Home

M68HC11EVB EVALUATION BOARD USER`S MANUAL

Contents

1. 6 12 Ze ER aug 3288 mw amp E e du 938 f E 4442444 k 275 E oi 208 2 2 858823885 pe 82 T 87 E g n 8 55 88 2 55 Hh ee amp 2 5 28 g a E 8 i zarn zB 38558598885295923998822R amp 5 amp 7 OBESE 5 I sg E zb Figure 6 2 EVB Schematic Diagram Sheet 2 of 2 M68HC11EVB D M MOTOROLA S RECORD INFORMATION APPENDIX A S RECORD INFORMATION A 1 INTRODUCTION The S record format for output modules was devised for the purpose of encoding programs or data files in a printable format for transportation between computer systems The transportation process can thus be visually monitored and the S records can be more easily edited A2 S RECORD CONTENT When viewed by the user S records are essentially character strings made of several fields which identify the record type record length memory address code data and checksum Each byte of binary data is encoded as a 2 character hexadecimal number the first character representing the high order 4 bits and the second the low order 4 bits of the byte The 5 fields which comprise an S record are shown below REC ORD LENGTH ADDRESS CODE DATA CHEC KSUM where the fields are composed as
2. hr aree 4 22 Memory Modify Dc 4 23 vi M68HC11EVB D M MOTOROLA CONTENTS CHAPTER 4 OPERATING INSTRUCTIONS continued MOVE noH 4 25 46 14 3Proceed C Online s ceo eor eH em 4 26 Register MOGI yi este eee iet ve o CE tale ue RODA 4 27 4 6 10 Stop at Address aieo ases euet da ip o anra iui ids need 4 28 Qr Mcr 4 29 4 60 18 Transparent ases 4 30 AOAI ues 4 3 4 6 20 Transfer Data Bootstrap MOGe i ail eI E ae 4 32 4 7 ASSEMBLY DISASSEMBLY PROCEDURES esee 4 34 4 8 DOWNLOADING ipe cute REESE TONS 4 39 TL 4 40 4 8 2 Apple Macintosh with MacTerminal to 0 00 4 4 4 8 3 Apple Macintosh with Red Ryder to 4 43 4 8 4 TBM PC with KERMIT to EV Bienes ento tane ete Ee Gann 4 44 4 8 5 with PROCOMM 600 00 enne enhn enne 4 45 CHAPTER 5 HARDWARE DESCRIPTION Sak INTRODUCTION o stone e Fd D RE HO aoe Fn EM Rie 5 1 945 GENERAL DESCRIPTION atu dam descende pan ada ng 5 1 Microcomputer Seco ep REP eO RE Mau t 5 1 52 2 JPort Replacement Wii asa o
3. RED WIRE 1 CND p VN N MODB NE oc STRA STRB EXTAL XTAL PCO PCI 2 PCS PCS o PC6 o Boer Bu E XIRQ 2 PDO PD1 zu NN N N PD2 PDS NN NN PD4 NN N oR PA7 NN N N PA6 oo PAS oo N ON UNY 4 Vn PAS noe 19 DY PA2 PAI Ww m 19 OR PBS NS t3 Mc PB4 LEE PB2 T PBI ix 0 PEO D 3 PEA lt F PES on PE2 0 PEG PE7 Gin VRL E Ww VRH NC mM WwW WwW Nc NC NC Ww WwW Nc D wo NC HARDWARE PREPARATION AND INSTALLATION MATES WITH TARGET SYSTEM EVALUATION gt CONNECTION PIN 59 PIN 1 i TOP VIEW RED WIRE 1 3 1 PIN 60 PIN 2 MATES WITH EVB MCU 1 0 gt PORT CONNECTOR NOTES 1 gt CABLE LENGTH NOT TO EXCEED 6 INCHES 27 60 PIN CONNECTOR SOCKET PART NUMBER 5414 7060 OR ANSLEY 4609 6000M 3 gt 60 CONDUCTOR FLAT RIBBON CABLE PART NUMBER 435350 60 OR ANSLEY 172 60 4 DOUBLE ROW POST 60 HEADER TYPE PART NUMBER AMPTRONICS 929715 01 50 Figure 2 3 MCU I O Port Extension Cable Assembly Diagram M68HC11EVB D 2
4. address1 Memory starting address lt address2 gt Memory ending address lt dest gt Destination starting address optional The MOVE command allows the user to copy move memory to new memory location If the destination is not specified the block of data residing from address1 to address2 will be moved up one byte Using the MOVE command on EEPROM locations will program EEPROM cells The MOVE command is useful when programming EEPROM As an example a program is created in user RAM using the assembler debugged using the monitor and then programmed into EEPROM with the MOVE command No messages will be displayed on the terminal CRT upon completion of the copy move operation only the prompt is displayed CAUTION Caution should be observed when moving data into EEPROM locations EVB MCU CONFIG register ROMON bit is cleared to disable MCU internal ROM EXAMPLE DESCRIPTION gt MOVE E000 E7FF C000 lt CR gt Move data from locations E000 E7FF to locations C000 C7FF gt M68HC11EVB D 4 25 OPERATING INSTRUCTIONS AA MOTOROLA P Proceed 4 6 14 Proceed Continue This command is used to proceed or continue program execution without having to remove assigned breakpoints This command is used to bypass assigned breakpoints in a program executed by the G command NOTE Refer to example program shown on page 4 15 for the following P command example Breakpoints have been inserted at locations 005 and C007 ref
5. gt gt VERIFY cat trial out CR Enter verify command cat trial out Mismatch encountered error addr E000 Error message displaying first byte address gt Refer to the downloading procedures at the end of this chapter for additional information pertaining to the use of the LOAD command M68HC11EVB D 4 31 OPERATING INSTRUCTIONS M MOTOROLA XBOOT Transfer Data Bootstrap Mode 4 6 20 Transfer Data Bootstrap Mode XBOOT lt addressl gt address2 where lt address1 gt Starting address lt address2 gt Ending address The XBOOT command loads transfers a block of data from addressl through address2 via the serial communications interface SCI to another MC68HC11 MCU device which has been reset in the bootstrap mode A leading control character of FF is sent prior to sending the data block This control character is part of the bootstrap mode protocol and establishes the baud rate for the rest of the transfer If only one address is provided the address will be used as the starting address and the block size will default to 256 bytes If no addresses are provided the block of addresses from 000 through COFF is assumed by the BUFFALO monitor program NOTE The MC68HC11A8 MCU requires a fixed block size of 256 bytes for bootloading while the MC68HCIIE9 MCU can accept variable length block of 1 to 512 bytes The XBOOT command generates SCI transmitter output signals at 7812 5 baud
6. continued M68HC11EVB D 4 35 OPERATING INSTRUCTIONS M MOTOROLA EXAMPLE PROGRAM PROGRAM DESCRIPTION 01 STX SOOFF gt BEQ C016 lt CR gt Branch true SCI RDR not full 27 F9 Branch false SCI RDR full COID STX 4065 gt LDAA 102F CR Read data from SCI RDR B6 10 2F C020 STAA 00 Y gt STAA 0 Y lt CR gt Store data byte 18 A7 00 C023 STX 00FF gt INX lt CR gt Increment fetch pointer 08 C024 TEST gt INY lt CR gt Increment storage pointer 18 08 C026 ASRB gt CPX C41F lt CR gt Done sending data 8C C4 C029 ASLD BEQ CO2E CR 27 03 02 STX 00FF gt JMP COOC CR No get next data byte 7E CO OC 02 MUL gt BRA CO2E CR Yes stop here 20 FE C030 ILLOP gt CTRL A Exit assembler dissembler mode The routines on the next page are performed on the SCI program loop just assembled NOTE Connector Pl pins 20 and 21 are connected connects SCI transmitter to the receiver in order to perform the following routines 4 36 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS TERMINAL CRT KEYBOARD ROUTINE DESCRIPTION gt RM Display user machine state 000 Y E8CC X 6FD1 A DF B OF 0 5 0054 000 C000 Y E8CC SPACE BAR X 6FD1 SPACE BAR A DF SPACE B 0F SPACE C DO FF BAR BAR gt BF C400 C41F 55 lt CR gt gt MD C400 C41F lt CR gt C400 55 55 55 55 55 55 CATO 55 55 55 55 55 55 gt BF C200 C220 00 lt CR gt gt BR C00
7. 13 HARDWARE PREPARATION AND INSTALLATION AA MOTOROLA 2 5 CHECKOUT PROCEDURE This procedure lets you perform a pre operational checkout of the EVB for basic operation Upon completion of the EVB installation to an external power supply and terminal check that the EVB is configured for the proper terminal baud rate refer to paragraph 2 3 5 Applying power to the EVB causes a power on reset POR to occur POR causes the MCU and user I O port circuitry to be reset and the monitor invoked The terminal monitor displays the following EVB monitor prompt BUFFALO X X ext Bit User Fast Friendly Aid to Logical Operation where X X is the revision of the monitor program ext denotes monitor program residing in external EPROM U3 int denotes monitor program residing in EEPROM MCU U10 If the EVB monitor prompt is not displayed as shown above press the user reset switch S1 If the monitor prompt cannot be displayed the possibility exists that the EVB cannot communicate via the terminal port because the CONFIG register NOSEC bit is enabled logic 0 Erasing the entire EEPROM array including the CONFIG register must be performed as follows 1 Remove installed jumper from reset select header J1 Reinstall jumper on MCU I O port connector P1 pins 1 and 2 top two pins 2 Press reset switch S1 3 Remove installed jumper from connector P1 Reinstall jumper on header 11 pins 1 and 2 4 Press reset switch S1 Interna
8. Apple Macintosh computer to the EVB perform the following steps 1 Select the following menu Terminal Settings Terminal TTY Cursor Shape Underline Line Width 80 Columns Select On Line Auto Repeat Click on OK 2 Select the following menu Compatibility Settings Baud rate 9600 same as EVBU Bits per Character 8 Bits Parity None Handshake None Connection Modem or Another Computer Connection Port Modem or Printer Click on OK 3 Select the following menu File Transfer Settings Settings for Pasting or Sending Text Word Wrap Outgoing Text File Transfer Protocol Text Settings for Saving Lines Off Top Retain Line Breaks Click on OK 4 Apply power to the EVB 5 Press Apple Macintosh computer keyboard carriage return CR key to display applicable EVB monitor prompt 6 Apple Macintosh computer displays the prompt M68HC11EVB D 4 41 OPERATING INSTRUCTIONS M MOTOROLA 7 Enter EVB monitor download command as follows gt LOADT Press RETURN after entering LOAD 8 Operate pull down File menu and select choose Send File 9 Use dialog box and select applicable S record object file Click on Send Motorola S record file is now transferred to the EVB NOTE S record file will not be displayed during the file transfer to the EVB Upon completion of the S record transfer the following message is displayed done gt NOTE The EVB may have to be reset to regain monitor con
9. HELP command enables the user available EVB command information to be displayed on the terminal CRT for quick reference purposes EXAMPLE gt HELP ASM lt addr gt Line assembler disassembler Do same address Do previous address CTRL J Do next address RETURN Do next opcode CTRL A Quit lt 1 gt lt addr2 gt lt data gt Block fill BR lt addr gt Set up breakpoint table BULK Erase the EEPROM BULKALL Erase EEPROM and CONFIG CALL lt addr gt Call user subroutine lt addr gt Execute user code LOAD VERIFY T or host download command Load or Verify S records MD addr1 lt addr2 gt Memory dump MM lt addr gt Memory modify Open same address CTRL H or Open previous address CTRL J Open next address SPACE Open next address RETURN Quit lt addr gt 0 Compute Offset to lt addr gt MOVE lt 1 gt lt s2 gt lt d gt Block move Proceed continue execution RM P Y X A B C or S Register modify T lt n gt Trace n instructions TM Transparent mode CTRL A exit CTRL B send break CTRL H Backspace CTRL W Wait for any key CTRL X or DELETE Abort cancel command RETURN Repeat last command gt 4 20 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS LOAD LOAD 4 6 10 Load LOAD host download command gt lt T gt where host dow
10. Memory The EVB memory map is a single map design User RAM resides at different address locations to that of the MCU ROM Any code debugged in the RAM which is not re locatable will require modification before being transferred to EPROM and executed instead of the monitor evaluation mode To evaluate programs normally held in ROM an 8k byte RAM is provided socket U5 An access time of 250 nanoseconds is necessary for a bus frequency of 2 1 MHz Jumper headers J3 and J7 configure socket U4 for an additional 8k byte RAM supplied by the user if required Refer to paragraph 2 3 3 for additional memory select information 5 2 4 Address Decoding De multiplexing Address decoding is accomplished via a MC74HC138 device U6 and is segmented into 8k byte blocks The low order address and data lines are de multiplexed using a MC74HC373 device U2 to communicate with ROM RAM and the ACIA The PRU uses a multiplexed input direct from the MCU 5 2 5 RS 232C I O Port Interface Circuits The EVB uses an MC68B50 ACIA device U9 to communicate to a terminal via an RS 232C driver receiver interface terminal I O port The terminal I O port baud rate is hardware selectable 300 9600 baud via jumper header J5 A second RS 232C driver receiver interface host I O port is fixed at 9600 baud via the MCU SCI using a 2 MHz E clock external bus This baud rate can be changed by software by reprogramming the BAUD register in the ONSCI subroutine of the BUFF
11. e A e ie Lade Est i d Hin rp 5 2 5 2 EVB Memory Diagramm uero due bd ea 5 3 6 1 EVB Parts Location Diagram n a In EHI M E t at eds 6 7 6 2 EVB Schematic Diagram Sheet 1 of 2 obe ERE MU ck 6 11 6 2 EVB Schematic Diagram Sheet 2 of 2 EE 6 12 C 1 Single Chip Mode C 2 viii M68HC11EVB D M MOTOROLA CONTENTS TABLES T BMB Speeclcationssesoetesi oro e Moles NER esc e Hn epee ae dedit Cio edd 1 2 1 2 External Equipment Requirements ei We bet EORR Pes quee a 1 4 3 1 Utility Subroutine Jump Table e es d io HL kei pape icc 3 3 3 2 T terr pt Vector Jump Table noD b Db otn 3 6 4 1 Monitor Memory Map Limitations esee 4 2 4 2 Monitor Program Commands on oe Een pU eeu ed oe eee ee 4 6 6 1 MCU I O Port Connector P1 Pin Assignments 6 2 6 2 Terminal I O Port Connector P2 Pin Assignments 6 4 6 3 Host I O Port Connector Pin Assignment cccccccccceeeeseeesenneeeeeeeeeeeeeetnnaeeeeeeees 6 5 6 4 Input Power Connector P4 Pin 1 0 001 111 6 6 6 5 Parts LIS alg sigue odd ec caste save Sige pete o PM caves riv Eus EE aga 6 8 M68HC11EVB D ix CONTENTS M MOTOROLA x M68HC11EVB D M MOTOROLA GENERAL INFORMATION CHAP
12. or DELETE 7 After a command has been entered pressing lt CR gt a second time will repeat the command 4 4 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS 4 6 MONITOR COMMANDS The monitor BUFFALO program commands are listed alphabetically by mnemonic in Table 4 2 Each of the commands are described in detail following the tabular command listing In most cases the initial single letter of the command mnemonic or a specific symbol shown in Table 4 2 can be used A minimum number of characters must be entered to at least guarantee uniqueness from other commands 1 MO MOVE ME MEMORY If the letter M is entered BUFFALO uses the first command in Table 4 2 that starts with M Additional terminal keyboard functions are as follows CTRL A CTRL CTRL CTRL J CTRL B DELET lt CR gt E Exit transparent mode or assembler Send break command to host in transparent mode Backspace Line feed If Wait freeze screen 1 Abort cancel command Enter command repeat last command NOTES Execution is restarted by any terminal keyboard key 2 When using the control key with a specialized command such as CTRL A the CTRL key is depressed and held then the A key is depressed Both keys are then released Command line input examples in this chapter are amplified with the following Bold entries are user entered on the terminal keyboard e Command li
13. output signal used to indicate an on line in service active status This pin is connected to both CTS pin 5 and DCD pin 8 7 SIG GND SIGNAL GROUND This line provides signal ground or common return connection common ground reference between the EVB and RS 232C compatible terminal DCD DATA CARRIER DETECT An output signal used to indicate an acceptable received line carrier signal has been detected This pin is connected to both CTS pin 5 and DSR pin 6 20 DTR DATA TERMINAL READY An input line used to indicate an on line in service active status 21 25 Not connected 6 4 M68HC11EVB D M MOTOROLA SUPPORT INFORMATION Table 6 3 Host I O Port Connector P3 Pin Assignments Pur rn Mnemonic Signal Name and Description DSR DATA SET READY An output signal used to indicate an on line in service active status This pin is connected to DCD pin 8 7 SIG GND SIGNAL GROUND This line provides signal ground or common return connection common ground reference between the EVB and RS 232C compatible host computer DCD DATA CARRIER DETECT An output signal used to indicate an acceptable received line carrier signal has been detected This pin is connected to DSR pin 6 20 DTR DATA TERMINAL READY An input line used to indicate an on line in service active status 21 25 Not connected M68HC11EVB D 6 5 SUPPORT INFORMATION M MOTOROLA Table 6 4 Input Power Connector P4 Pin Assignments Signal Mnemoni
14. step by step procedures M68HC11EVB D 4 39 OPERATING INSTRUCTIONS 4 8 1 EXORciser to EVB AA MOTOROLA To perform the EXORciser to EVB downloading procedure perform observe the following 4 40 EXAMPLES gt TM lt CR gt lt CR gt EXBUGO9 2 1 E MDOS lt CR gt DOS09 3 05 CTRL A gt LOAD COPY TRIAL LX 1 CN lt CR gt gt LOAD COPY TRIAL LX 1 CN lt CR gt COPY TRIAL LX 1 CN done gt gt LOAD COPY TRIAL LX 1 CN lt CR gt COPY TRIAL LX 1 CN error addr F800 gt gt VERIFY COPY TRIAL LX 1 CN lt CR gt COPY TRIAL LX 1 CN done gt gt VERIFY COPY TRIAL LX 1 CN lt CR gt COPY TRIAL LX 1 CN error addr F800 gt DESCRIPTION EXORciser initialized into MDOS via TM command to download S records Exit transparent mode LOAD command entered to download data to EVB through host port LOAD command entered Downloading successful Data transfer completed LOAD command entered Downloading unsuccessful Error address displayed VERIFY command entered Compares S records to RAM file Comparison verified VERIFY command entered Verification unsuccessful Error address displayed M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS 4 8 2 Apple Macintosh with MacTerminal to EVB The MacTerminal downloading program in this application is used as a terminal emulator for the Apple Macintosh computer To download a Motorola S record file from the
15. to a target system Connector P1 facilitates this interconnection Connectors P2 and P3 are also provided to facilitate interconnection of a terminal and a host computer respectively Connector P4 interconnects an external power supply to the EVB Pin assignments for the above connectors P1 through P4 are identified in Tables 6 1 through 6 4 respectively Connector signals are identified by pin number signal mnemonic and signal name and description M68HC11EVB D 6 1 SUPPORT INFORMATION M MOTOROLA Table 6 1 MCU I O Port Connector P1 Pin Assignments Signal Mnemonic Signal Name and Description 2 MODB MODE B An input control line used for MCU mode selection A high level enables the expanded multiplexed mode and a low level enables the special test mode of the EVB MCU 3 MODA MODE A An input control line used for MCU mode selection during reset An open drain output line used for LIR status indication 4 STRA STROBE A An input control line used for parallel port operations 5 E ENABLE CLOCK An output control line used for timing reference E clock frequency is one fourth the frequency of the XTAL and EXTAL pins STRB STROBE B An output control line used for parallel port I O operations EXTAL EXTAL External MCU clock input line XTAL XTAL Internal MCU clock line used to control the EVB clock generator circuitry PCO PC7 PORT bits 0 7 General purpose lines 17 RESET RESET An acti
16. which are intended for another MC68HC11 MCU device operating in the bootstrap mode These signals appear as nonsense data to the terminal display used for normal communication with the EVB After using the XBOOT command the EVB must be reset by pressing the reset switch S1 before normal communications can resume 4 32 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS XBOOT Transfer Data Bootstrap Mode The following procedure describes the use of the XBOOT command 1 Assemble or fill EVB MCU EEPROM locations B600 B6FF with program to be bootloaded transmitted transferred to target MC68HC11 MCU device 2 Enter XBOOT command and addresses without pressing carriage return CR key as follows gt XBOOT B600 B6FF Do not press the RETURN key 3 Remove previously installed fabricated jumper from jumper header 76 4 Connect jumper wire from jumper header J6 pin 1 to RxD input of target MC68HC11 MCU device 5 Reset target MC68HCI 1 MCU device in bootstrap mode 6 Press carriage return CR key to invoke XBOOT command Since TxD is not connected to the terminal the user will not observe any changes on the terminal display CRT The bootload process takes approximately a third of a second to finish 7 Disconnect jumper wire installed in step d 8 Install fabricated jumper removed in step c 9 Press EVBU reset switch S1 to restore normal EVB operation M68HC11EVB D 4 33 OPERATING INSTRUCTIONS M MOTOROLA 4 7 A
17. 000 103F The EVB allows the user to use all the features of the monitor BUFFALO program however it should be noted that the monitor program uses the MCU on chip RAM locations 0048 00FF leaving only 72 bytes for the user i e 0000 0047 This should be remembered when writing code M68HC11EVB D 5 1 HARDWARE DESCRIPTION AA MOTOROLA 5 2 2 Port Replacement Unit The EVB operates in the expanded multiplexed mode of operation An MC68HC24 PRU device U1 is used to replace the MCU I O ports B and C including STRA and STRB control lines used for single chip mode of operation The PRU provides the required single chip mode I O lines for target system evaluation emulation via the EVB MCU extension I O port connector P1 HOST COMPUTER 0 PDO PDS PEO PE7 EU RS 232C DRIVERS AND TARGET A RECEIVERS SYSTEM 7 7 TERMINAL PCO PC7 Figure 5 1 EVB Block Diagram 5 2 M68HC11EVB D AA MOTOROLA M68HC11EVB D INTERNAL RAM MCU RESERVED NOT USED PRU REG DECODE NOT USED IONAL 8K RAM NOT USED 0000 0032 USER RAM HARDWARE DESCRIPTION 0033 0047 50048 500 3 USER STACK POINTER MONI TOR VARI ABLES 500 4 500 VECTOR JUMP TABLE Figure 5 2 EVB Memory Map Diagram 5 3 HARDWARE DESCRIPTION M MOTOROLA 5 2 3
18. 1 ult 012 413 J5 U14 R13 C12 Li 5 R15 R16 013 R17 C14 Y2 P4 R18 J6 C16 C17 Figure 6 1 EVB Parts Location Diagram M68HC11EVB D 6 7 SUPPORT INFORMATION M MOTOROLA Table 6 5 EVB Parts List Reference Designation Component Description Printed Wiring Board PWB M68HC11EVB GI C5 08 011 013 014 617 C18 Header jumper single row post 2 pin Aptronics 929705 01 02 Header jumper single row post 3 pin Aptronics 929705 01 03 C6 C7 C16 C12 C15 J1 J3 J6 J2 J4 R1 R3 R5 R10 R4 R11 R13 R15 R12 6 8 Header jumper double row post 12 pin Aptronics 929715 01 06 Header double row post 60 pin Aptronics 929715 01 30 MCU I O port connector Connector cable 25 ITT DBP 25SAA terminal host port connector Terminal block 4 position Electrovert 25 112 0453 power supply connector M68HC11EVB D AA MOTOROLA SUPPORT INFORMATION Table 6 5 EVB Parts List continued I C MCM6164 8k RAM user supplied 1 MC68HC11A1FN MCU Note 1 U15 Voltage detector 3 80 4 20 Vdc Motorola MC34064P or Seiko S 8054HN XU1 Socket PC mount 44 pin PLCC AMP 821 551 1 use with U1 M68HC11EVB D 6 9 SUPPORT INFORMATION M MOTOROLA Table 6 5 EVB Parts List continued Reference Designation Component Description XU3 XU5 Socket 28 pin DIP Robinson Nugent ICL 286 S7 TG use with U3 U5 XU9 Socket 24 pin D
19. 17 to be used by the EVB This is accomplished by the installation of a fabricated jumper on pins 1 and 2 The EVB is factory configured and shipped with the jumper installed as shown below J1 oe 1 2 This jumper is removed from pins 1 and 2 when the EVB reset circuitry is used without target system intervention 2 2 M68HC11EVB D M MOTOROLA HARDWARE PREPARATION AND INSTALLATION 2 3 2 Clock Select Header J2 Jumper header J2 is used to select either internal or external clock source to be used by the EVB The internal EVB clock source is an 8 MHz crystal for a bus rate of 2 MHz The EVB is factory configured and shipped with the clock input selected for internal clock source This is accomplished by the installation of a fabricated jumper on pins 2 and 3 as shown below J2 1 2 3 External Internal If an external TTL clock source from the target system via MCU I O port connector pin 7 is required the jumper is repositioned between pins 1 and 2 M68HC11EVB D 2 3 HARDWARE PREPARATION AND INSTALLATION AA MOTOROLA 2 3 3 Memory Select Headers J3 and J7 Jumper headers J3 and J7 are used to configure the EVB circuitry for an additional 8k memory device e g MCM6164 installed at location U4 This device is provided by the user if required If a RAM device is installed at location U4 a fabricated jumper is installed on pins and 2 of jumper header J3 or J7 as shown below J3 J7 NOTE Jumper headers J3 an
20. 19 NC DCD 8 O 20 DTR NC 9 g O 21 NC NC 10 d 22 NC NC 11 o9 23 NC NC 12 o9 24 NC NC 13 25 NC HOST NOTE The RXD and TXD signal directions output versus input are reversed as compared to the terminal I O port The EVB looks like a terminal device to the host computing device while the EVB is a computing device to a terminal device even when the terminal device happens to be a personal computer such as an IBM PC or a Macintosh computer M68HC11EVB D 2 9 HARDWARE PREPARATION AND INSTALLATION M MOTOROLA 20 OR 25 CONDUCTOR FLAT RIBBON CABLE 3M 3365 20 OR 3M 3365 25 25 D SUBMINIATURE MALE 25 D SUBMINIATURE FEMALE PIN CONNECTOR SOCKET CONNECTOR PART S PART S 1 CIRCUIT ASSEMBLY CORP 1 CIRCUIT ASSEMBLY CORP CA 25 SMD P CA 25 SMD S 2 ITT CANNON DBSP B25P 2 ITT CANNON DBSP B25S 3 ANSLEY 609 25P 3 ANSLEY 609 25S 4 WINCHESTER 49 1125P 4 WINCHESTER 49 1125S 25 PIN D SUBMINIATURE CONNECTOR RED WIRE gt NOT CONNECTED SIGNAL GND 25 PIN D SUBMINIATURE CONNECTOR Figure 2 2 Terminal Host Computer Cable Assembly Diagram The EVB can operate with only pins 2 3 and 7 TXD RXD and SIGNAL GND connected however the terminal device may need the other handshake lines for proper operation 2 10 M68HC11EVB D M MOTOROLA HARDWARE PREPARATION AND INSTALLATION 2 4 4 Target System EVB Interconnection Target system to EVB i
21. 32C compatible Host computer RS 232C compatible MCU extension HCMOS TTL compatible Temperature Operating 25 degrees C Storage 40 to 85 degrees C Relative humidity 0 to 90 non condensing Power requirements 5 Vdc 9 0 5 A max 12 Vdc 0 1 A max 12 Vdc 0 1 A max Dimensions Width 7 062 in 17 8 cm Length 4 625 in 11 75 cm 1 2 M68HC11EVB D M MOTOROLA GENERAL INFORMATION 1 4 GENERAL DESCRIPTION The MC68HC11 MCU device is an advanced single chip MCU with on chip memory and peripheral functions Refer to the MC68HC11 MCU data sheet for additional device information To demonstrate the capabilities of this MCU the EVB functions with a debug monitor program called BUFFALO Bit User Fast Friendly Aid to Logical Operations This monitor program is contained within an on board EPROM external to the MCU The EVB provides low cost tool for debugging and evaluation of MC68HC11 MCU based target system equipment Figure 1 1 is a block diagram of the EVB The EVB is not intended to be a replacement for a much more powerful and flexible tool such as the Motorola M68HC11EVM Evaluation Module The EVB operates in either the debugging or evaluation emulation mode of operation The first mode of operation lets you debug your code using the BUFFALO monitor program User code is assembled on the EVB or on a host computer and then downloaded to the EVB RAM via Motorola S records The second mode of operation lets yo
22. 4 00 CO2E CR C004 COOA C gt G C000 lt CR gt P C004 Y C2 gt P lt CR gt P COOA Y C2 gt BR C024 lt CR gt C004 C00A C gt P lt CR gt P C024 Y C2 gt MD C200 55 00 C210 00 00 gt P P C024 Y C2 gt MD C200 55 55 C210 00 00 02 0000 00 X 6FD1 A 00 X C400 A 02E C024 00 X C401 A C200 C210 lt CR gt 00 00 00 00 00 00 00 00 01 X C402 A C200 C210 lt CR gt 00 00 00 00 00 00 00 00 BR C024 CR C004 00 continued M68HC11EVB D 02 0000 Su 55 95 29 295 9 9 5919 DF B OF C F9 S CO B OF C E9 5 55 00 00 B OF 1 S 00 00 00 00 00 00 00 00 55 00 00 B OF 1 5 00 00 00 00 00 00 00 00 Block fill with 55 Verify block fill 55 55 55 55 55 UUUUUUUUUUUUUUUU 55 55 55 55 55 UUUUUUUUUUUUUUUU Clear data storage area Set breakpoints Execute program 004 Proceed thru first breakpoint 004 Insert breakpoint 004A Display machine state after first loop 00 00 00 00 00 U 00 00 00 00 00 004 Display machine state after second loop 00 00 00 00 00 UU 00 00 00 00 00 Remove breakpoint 4 37 OPERATING INSTRUCTIONS M MOTOROLA TERMINAL CRT KEYBOARD ROUTINE DESCRIPTION gt P lt CR gt 02 Y C21F X C41F A 55 B OF 4 5 004 gt MD C200 C210 lt CR gt Display machine state after last breakpoint C200 55 55 55 55 55 55 55 55 55 55 55 5
23. 5 55 55 55 55 UUUUUUUUUUUUUUUU C210 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 00 UUUUUUUUUUUUUUU gt 4 38 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS 4 5 DOWNLOADING PROCEDURES This portion of text describes the EVB downloading procedures The downloading operation enables the user to transfer information from Motorola s EXORciser development station or a host personal computer to the EVB or target system memory Specific downloading procedures are described enabling the user to perform downloading operations with an EXORciser development station and host personal computer PC systems EXORciser downloading operations are accomplished utilizing the TM and LOAD commands The TM Transparent Mode command connects the EVB host port to the terminal port which allows direct communication between the terminal and host computer All I O between the ports are ignored by the EVB until the exit command CTRL A is entered from the terminal The LOAD command moves data information in S record format see Appendix A from an external host computer to the EVB user RAM The VERIFY command is used to compare the S record data to memory data Ensure that a jumper is installed on pins 1 and 2 of the host port RX signal disabling header 14 during all downloading operations or when communicating to a host computer e g EXORciser in the transparent mode Refer to paragraph 2 3 6 The transparent mode of operation is not applicable to the
24. 8HC11A1 MCU 1 26 U11 MC74HC74 D TYPE FLIP FLOP 7 14 U12 MC74HC14 INVERTER 7 14 U13 MC74HC 4040 RIPPLE COUNTER 8 16 U14 MC1489P RS 232C RECEIVER 7 Figure 6 2 EVB Schematic Diagram Sheet 1 of 2 M68HC11EVB D SUPPORT INFORMATION gt gt DIGITAL SWITH U7 OPERA ES AS FOLLOWS CONTROL PINS SWITCH 5 6 12 OR 13 OPERATION LOGIC ZERO 0 OFF OPEN LOGIC ONE 1 ON CLOSED 2 i SWITCH SYMBOL CONTROL PIN NOT USED DEVICE U11A 74 1 R 3 5 C Q NC 2 _ 6 D 4 5V SUPPORT INFORMATION M MOTOROLA PRU i uss x 1 EH NEZ RD 58 lo 9 ND
25. ALO monitor program Refer to the buf25 asm file on the EVB diskette for additional information pertaining to the ONSCI subroutine The host I O port is provided for downloading Motorola S records via the BUFFALO monitor commands When using the host I O port either by executing the HOST or LOAD commands The target system Serial Communications Interface SCI is switched to the host I O port via the MC74HC4066 digital switch device U7 and MC74HC74 latch device U11 The receiver connection from the host I O port is now connected to the RXD port of the MCU The switching of the receiver line from the target system to the host I O port is accomplished by writing a logic one in the bit 0 to any address in the range 4000 5FFF Likewise writing a zero in bit 0 to any address in the same range results in the target system being connected to the RXD pin of the MCU As the RS 232C handshake lines are not used a delay of approximately 300 milliseconds is present between successive characters sent to the host computer during the execution of the LOAD command in the monitor program 5 4 M68HC11EVB D M MOTOROLA SUPPORT INFORMATION CHAPTER 6 SUPPORT INFORMATION 6 1 INTRODUCTION This chapter provides the connector signal descriptions parts list with associated parts location diagram and schematic diagrams for the EVB 6 2 CONNECTOR SIGNAL DESCRIPTIONS The EVB provides one input output I O connector that is used to interconnect the EVB
26. ARATION AND INSTALLATION 2 3 6 Host Port RX Signal Disable Header J6 Jumper header J6 is used to disable the host computer I O port RX output signal line connector P3 pin 2 when using the EVB MCU SCI in a target system application When performing a downloading operation or communicating to a host computer in the transparent mode a fabricated jumper is installed on pins 1 and 2 as shown below J6 oe 1 2 Signal disabling is accomplished by the removal of the fabricated jumper installed on pins 1 and 2 2 4 INSTALLATION INSTRUCTIONS The EVB is designed for table top operation A user supplied power supply and RS 232C compatible terminal are required for EVB operation An RS 232C compatible host computer is optional for downloading user assembled code to the EVB 2 4 1 Power Supply EVB Interconnection The EVB requires 5 Vdc 0 5 A 12 Vdc 0 1 A 12 Vdc 0 1 A and GND for operation Interconnection of the power supply wiring to the EVB power supply connector P4 is shown below P4 ZENS 12 VDC GND 5 VDC 12 VDC The power supply cable simply consists of four 14 22 AWG wires that interconnect 12 VDC GND 5 VDC and 12 VDC from the user supplied power supply to the EVB connector P4 M68HC11EVB D 2 7 HARDWARE PREPARATION AND INSTALLATION M MOTOROLA 2 4 2 Terminal EVB Interconnection Interconnection of an RS 232C compatible terminal to the EVB is accomplished via a user supplied 20 or 25 condu
27. CR Remove all breakpoints 0000 0000 0000 0000 gt gt BR E000 lt CR gt Only RAM locations can be breakpointed 000 Invalid address message 0000 0000 0000 0000 gt gt BR C005 C007 C009 C011 CO13 CR Maximum of four breakpoints can be set Full Buffer full message C005 C007 C009 C011 gt M68HC11EVB D 4 13 OPERATING INSTRUCTIONS AA MOTOROLA BULK BULK 4 6 4 Bulk The BULK command allows the user to erase all MCU EEPROM locations B600 B7FF A delay loop is built in such that the erase time is about 10 ms when running at 1 MHz E clock NOTE No erase verification message will be displayed upon completion of the bulk EEPROM erase operation User must verify erase operation by examining EEPROM locations using the MM or MD command EXAMPLE DESCRIPTION gt BULK lt CR gt Bulk erase all MCU EEPROM locations B600 B7FF gt Prompt indicates erase sequence completed 4 14 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS BULKALL BULKALL 4 6 5 Bulkall BULKALL The BULKALL command allows the user to erase all MCU EEPROM locations B600 B7FF including the configuration CONFIG register location 103F A delay loop is built in such that the erase time is about 10 ms when running at 1 MHz E clock This command is only applicable for A38P and A95J mask sets Newer mask sets do not allow CONFIG to be changed in normal operating modes NOTE No erase verification message will be di
28. ERAL INFORMATION AA MOTOROLA 7 HOST COMPUTER PDO PDS D0 A0 D7 A7 PEO PE7 RS 232C DRIVERS AND TARGET A 2 2 RECEIVERS SYSTEM PBO PB7 TERMINAL PCO PC7 Figure 1 1 EVB Block Diagram 1 5 EQUIPMENT REQUIRED Table 1 2 lists the external equipment requirements for EVB operation Table 1 2 External Equipment Requirements External Equipment 5 12 12 power supply Terminal RS 232C compatible Host computer RS 232C compatible Target system EVB MCU I O port extension cable assembly 1 Refer to Chapter 2 for details 2 Optional not required for basic operation 1 4 M68HC11EVB D M MOTOROLA HARDWARE PREPARATION AND INSTALLATION CHAPTER 2 HARDWARE PREPARATION AND INSTALLATION 2 1 INTRODUCTION This chapter provides unpacking instructions hardware preparation and installation instructions for the EVB 2 2 UNPACKING INSTRUCTIONS After unpack EVM from shipping carton refer to the packing list and verify that all items are present Save packing material for storing or reshipping the EVM 2 3 HARDWARE PREPARATION This section describes the inspection preparation of EVB components prior to target system installation This description ensures that the EVB components are properly configured for target system operation The EVB has been factory tested and is shipped with factory installed jumpers Inspect the EVB for jumper plac
29. IP Robinson Nugent ICL 246 S7 TG use with 09 XU10 Socket PC mount 52 pin PLCC AMP 821 575 1 use with U10 Fabricated jumper Aptronics 929955 00 use with jumper headers J1 J6 NOTES 1 MCU supplied with the EVB have the configuration CONFIG register ROMON bit cleared to disable MCU internal ROM thereby allowing external EPROM containing the BUFFALO program to control EVB operations 2 Crystal frequencies from 4 to 8 MHz up to 8 4 MHz can be used without any changes to the 24 pF capacitors C6 and C7 and 10M ohm resistor R5 values 3 8 MHz crystal obtains 2 MHz E clock 9600 baud MCU SCI operation 4 MHz crystal obtains 1 MHz E clock 4800 baud MCU SCI operation 6 10 M68HC11EVB D M MOTOROLA 6 4 DIAGRAMS Figure 6 2 is the EVB schematic diagram NOTES 1 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE IN OHMS 52 1 4W ALL CAPACITORS ARE IN uF ALL VOLTAGES ARE DC 2 DEVICE TYPE NUMBERS LISTED BELOW ARE FOR REFERENCE ONLY DEVICE TYPE NUMBER VARIES WITH MANUFACTURER REF DEVICE DES TYPE NOTES GND 5V 12V 12V U1 MC68HC24 PRU 29 17 U2 MC74HC373 TRANSPARENT LATCH 10 20 U3 2764 8K EPROM 250ns 14 28 U4 USER SUPPLIED RAM 250ns 14 28 US MCM6164 8K RAM 250ns 14 28 U6 MC74HC138 DECODER DEMUX 8 16 U7 MC74HC4066 DIGITAL SWITCH 7 14 U8 MC1488P RS 232C DRIVER 7 14 1 U9 MC68B50P ACIA 1 12 U10 MC6
30. LA STOPAT Stop at Address 4 6 16 Stop at Address STOPAT address where address specified user program counter PC stop address The STOPAT command causes a user program to be executed one instruction at time until the specified address is encountered Execution begins with the current user PC address and stop just before execution of the instruction at the specified stop address The STOPAT command should only be used when the current value of the user PC register is known For example after a breakpoint is reached or after an RD command is used to set the user PC The STOPAT command has an advantage over breakpoints in that a stop address can be a ROM location while breakpoints only operate in RAM or EEPROM locations Since the STOPAT command traces one instruction at a time with a hidden return to the monitor after each user instruction some user programs will appear to execute slowly The stop address specified in the STOPAT command must be the address of an opcode just as breakpoints can only be set at opcode addresses NOTE Refer to example program shown on page 4 15 for the following STOPAT command example The RD command was used prior to this example to set the user PC register to 000 EXAMPLE DESCRIPTION gt STOPAT 0108 lt CR gt Execute example program until 0108 is reached 0108 Y DEFE X F4FF A 04 B FE C 90 5 0047 gt 4 28 M68HC11EVB D M MOTOROLA OPERATING INSTR
31. LL G and P command examples gt ASM C000 lt CR gt C000 STX SFFFF gt LDAA 44 lt CR gt 86 44 C002 STX SFFFF gt STAA C7FC lt CR gt B7 C7 FC C005 STX SFFFF gt NOP lt CR gt 01 C006 STX SFFFF gt NOP lt CR gt 01 007 5 SFFFE gt NOP lt CR gt 01 008 STX gt RTS lt CR gt 39 C009 5 SFFFF CTRL A 4 16 M68HC11EVB D M MOTOROLA CALL EXAMPLE gt CALL C000 lt CR gt P C000 Y DEFE gt M68HC11EVB D X F4FF 44 B OPERATING INSTRUCTIONS CALL DESCRIPTION Execute program subroutine E C DO S 0044A Displays register status at time RTS encountered except P register contents 4 17 OPERATING INSTRUCTIONS M MOTOROLA EEMOD EEPROM Modify Mapping 4 6 7 EEPROM Modify Mapping EEMOD lt addressl gt lt address2 gt where None Display current starting and ending EEPROM address lt address1 gt Specify new EEPROM starting address lt address2 gt Specify new EEPROM ending address The EEMOD command is only used when the EVB resident MCU is changed from XC68HCIIAIEN device to an XC68HCI1A2FN XC68HCIIE2FEN or XC68HC811E2FN device The EEMOD command informs the monitor where the EEPROM resident MCU is mapped If the starting address is specified and the ending address is not specified the re mapped address location will end at lt address1 gt 2K bytes EXAMPLES DESCRIPTI
32. M68HC11EVB D REV 2 November 1996 M68HC11EVB EVALUATION BOARD USER S MANUAL Copyright 1986 1996 by Motorola Inc Motorola reserves the right to make changes without further notice to any products herein to improve reliability function or design Motorola does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under its patent rights nor the rights of others Motorola products are not designed intended or authorized for use as components in systems intended for surgical implant into the body or other applications intended to support or sustain life or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur Should Buyer purchase or use Motorola products for any such unintended or unauthorized application Buyer shall indemnify and hold Motorola and its officers employees subsidiaries affiliates and distributors harmless against all claims costs damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim of personal injury or death associated with such unintended or unauthorized use even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part Information contained in this document applies to REVision C M68HC11EVB Evaluation Boards serial numbers 6000 through 99 999 The co
33. ON gt EEMOD lt CR gt Displays current EEPROM starting and ending address B600 BUFF locations XC68HC11AI device gt gt EEMOD E800 lt CR gt Specify remapped EEPROM starting address E800 Starting address amp ending address displayed gt Ending address automatically established via lt addr1 gt 2K bytes gt EEMOD F800 FFFF lt CR gt Specify remapped EEPROM starting and ending address F800 FFFF for an XC68HC811E2 device gt 4 18 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS G Go 4 6 8 Go G lt address gt where address starting address where program execution begins The G command allows the user to initiate user program execution free run in real time The user may optionally specify a starting address where execution is to begin Execution starts at the current program counter PC address location unless a starting address is specified Program execution continues until a breakpoint is encountered or the EVB reset switch S1 is activated pressed NOTE Refer to example program shown on page 4 15 and insert breakpoints at locations 005 and C007 for the following G command example EXAMPLE DESCRIPTION gt G 000 lt gt Begin program execution at PC address location C000 P C005 Y 0000 X 00CD A 44 B FB C DO 004 Breakpoint encountered at gt C005 M68HC11EVB D 4 19 OPERATING INSTRUCTIONS AA MOTOROLA HELP HELP 4 6 9 Help HELP The
34. OTOROLA 4 46 M68HC11EVB D M MOTOROLA HARDWARE DESCRIPTION CHAPTER 5 HARDWARE DESCRIPTION 5 1 INTRODUCTION This chapter provides an overall general description of the EVB hardware This description is supported by a simplified block diagram Figure 5 1 and a memory map diagram Figure 5 2 The EVB schematic diagram located in Chapter 6 can also be referred to for the following descriptions 5 2 GENERAL DESCRIPTION Overall evaluation debugging control of the EVB is provided by the monitor BUFFALO program residing in EPROM external to the MCU via terminal intervention The target system interface is provided by the MCU and PRU devices RS 232C terminal host I O port interface circuitry provides communication and data transfer operations between the EVB and external terminal host computer devices 5 2 1 Microcomputer The M68HC11A1 MCU 010 operates in the expanded mode of operation This is accomplished by 5 Vdc applied to MCU MODA and MODB pins The MCU configuration CONFIG register implemented in EEPROM is programmed such that the ROMON bit is cleared for EVB operations When this bit is cleared MCU internal ROM is disabled and that memory space becomes externally accessed space This allows the memory at E000 SFFFF to contain the monitor BUFFALO program or user program for emulation in external EPROM The monitor program uses the MCU internal RAM located at 0048 00FF The control registers are located at 1
35. PC to EVB operations Therefore the TM command is not utilized in the PC e g Apple Macintosh and IBM PC downloading procedures The following pages provide examples and descriptions of how to perform EVB downloading operations in conjunction with an EXORciser development station and Apple Macintosh and IBM PC host computer systems Downloading operations allow Motorola s S record files to be transferred from a host computer to the EVB or to be verified against data in EVB memory S record files are made up of data and checksum values in a special format which facilitates downloading A software terminal emulator program is required for PC downloading S record files Some typical terminal emulator programs for the IBM PC include PROCOMM and KERMIT Typical terminal emulator programs for the Apple Macintosh include MacTerminal and Red Ryder S record programs for downloading are created by assembling programs on the PC The steps needed to develop a program are described briefly as follows 1 Assembly language program is entered into a text file on the PC A text editor is used to create this text file which is called a source program 2 An assembler program operating on the PC is used to translate the source program into an S record object file and or listing file Buf25 asm file on the EVB diskette is an example of a large listing 3 After the creation of the S record files the files are downloaded to the EVB as shown in the following
36. SSEMBLY DISASSEMBLY PROCEDURES The assembler disassembler is an interactive assembler editor Each source line is converted into the proper machine language code and is stored in memory overwriting previous data on a line by line basis at the time of entry In order to display an instruction the machine code is disassembled and the instruction mnemonic and operands are displayed All valid opcodes are converted to assembly language mnemonics All invalid opcodes are displayed on the terminal CRT as ILLOP The syntax rules for the assembler are as follows a All numerical values are assumed to be hexadecimal Therefore no base designators e g hex 96 binary etc are allowed b Operands must be separated by one or more space or tab characters c Any characters after a valid mnemonic and associated operands are assumed to be comments and are ignored Addressing modes are designated as follows Immediate addressing is designated by preceding the address with a sign b Indexed addressing is designated by a comma The comma must be preceded a one byte relative offset even if the offset is 00 and the comma must be followed by an X or Y designating which index register to use e g LDAA 00 X c Direct and extended addressing is specified by the length of the address operand 1 or 2 digits specifies direct 3 or 4 digits specifies extended Extended addressing can be forced by padding the address operand with leading z
37. TER 1 GENERAL INFORMATION 1 1 INTRODUCTION This manual provides general information hardware preparation installation instructions monitor program description operating instructions hardware description and support information for the M68HC11 Evaluation Board EVB Downloading S record information is contained in Appendix A While a listing of the EVB monitor program is stored on the diskettes supplied with the EVB see file buf25 asm This file may be viewed using any text reader capable of handling a 123K file NOTE Unless otherwise specified all address references are in hexadecimal throughout this manual An asterisk following the signal name denotes that the signal is true or valid when the signal is low 1 2 FEATURES EVB features include e Aneconomical means of debugging user assembled code and evaluating target systems incorporating MC68HCI 1 microcomputer unit MCU device e One line assembler disassembler e Host computer downloading capability MC68HCI1 MCU based debugging evaluating circuitry e MC68HC 24 Port Replacement Unit PRU based MCU I O expansion circuitry e 6850 Asynchronous Communications Interface Adapter based terminal I O port circuitry RS 232C compatible terminal host computer I O ports M68HC11EVB D 1 1 GENERAL INFORMATION AA MOTOROLA 1 3 SPECIFICATIONS Table 1 1 lists the EVB specifications Table 1 1 EVB Specifications ports Terminal RS 2
38. TREG FF8E CHGBYT Write value if any from SHFTREG 1 to memory location pointed to by X Operation also applicable to EEPROM locations FF91 READBU Read next character from INBUFF FF94 INCBUF Increment pointer into input buffer FF97 DECBUF Decrement pointer into input buffer FF9A WSKIP Read input buffer until non white space character found FF9D CHKABR Monitor input for CTRL X DELETE or CTRL W requests FFAO UPCASE If character in accumulator A is lower case alpha convert to upper case M68HC11EVB D 3 3 MONITOR PROGRAM 3 4 Address FFA3 FFA6 FFA9 FFAC FFAF FFB2 FFB5 FFB8 FFBB M MOTOROLA Table 3 1 Utility Subroutine Jump Table continued WCHEK DCHEK INIT INPUT OUTPUT OUTLHL OUTRHL OUTA OUT1BY OUT1BS OUT2BS Test character in accumulator A and return with Z bit set if character is white space space comma tab Test character in accumulator A and return with Z bit set if character is delimiter carriage return or white space Initialize I O device Read device Write I O device Convert left nibble of accumulator A contents to ASCII and output to terminal port Convert right nibble of accumulator A contents to ASCII and output to terminal port Output accumulator A ASCII character Convert binary byte at address in index register X to two ASCII characters and output Returns address in index register X pointing to
39. The following pages describe how to operate the assembler disassembler by creating a typical program loop and debugging the program by the use of the EVB monitor commands A typical Serial Communications Interface SCI program loop is first assembled Routine examples are then provided to illustrate how to perform breakpoint setting proceeding from breakpoint register display and modification and initiation of user program execution A program loop that transmits RAM data from the SCI transmitter to the SCI receiver is assembled as follows EXAMPLE PROGRAM PROGRAM DESCRIPTION gt BF C200 C21F 00 lt CR gt Clear memory space gt ASM C000 Enter assembler disassembler mode C000 CLR 0800 gt LDY C200 lt CR gt First byte where data is stored 18 CE C2 00 C004 TEST gt LDX C400 lt CR gt Point to data to be fetched CE C4 00 C007 TEST gt LDAA 102E lt CR gt Clear bit if set B6 10 2E C00A TEST gt LDAA 0 X CR Get first data byte A6 00 00 TEST gt STAA 102F CR Store data in SCI data register B7 10 2F COOF INX gt LDAA 102E CR Read SCI status register B6 10 2E C012 TEST gt ANDA 80 lt CR gt Send data byte 84 80 C014 TEST gt BEQ COOF CR Wait for empty transmit data reg 27 F9 C016 BITB 80F6 gt LDAA 102E CR Read SCI status register B6 10 2E C019 BVS COIB gt ANDA 20 lt CR gt Extract RDRF bit from status reg 84 20
40. UCTIONS T Trace 4 6 17 Trace T lt n gt where n number in hexadecimal 1 FF max of instructions to execute The T command allows the user to monitor program execution on an instruction by instruction basis The user may optionally execute several instructions at a time by entering a count value up to FF Execution starts at the current program counter PC The PC displayed with the event message is of the next instruction to be executed The trace command operates by setting the OC5 interrupt to time out after the first cycle of the first opcode fetched NOTE The RD command was used to set the user PC register to FF85 prior to starting the following trace examples SINGLE TRACE EXAMPLE gt T lt CR gt JMP 1 7 1 7 Y FFFF X FFFF 04 C 10 5 0046 gt MULTIPLE TRACE EXAMPLES gt T 2 lt CR gt PSHA 1 8 Y FFFF X FFFF A 04 B FF C 10 5 0046 PSHB 1 9 Y FFFF X FFFF A 04 B FF C 10 5 0045 gt T 3 lt CR gt PSHX Y FFFF X FFFF A 04 B FF C 10 5 0043 JSR SE19D P E19D Y FFFF X FFFF 04 B FF C 10 5 0041 CMPA 4561 19 Y FFFF X FFFF 04 B FF C 19 5 0041 T A CR BLT SE1A7 1 7 Y FFFF X FFFF A 04 B FF C 19 S 0041 RTS Y FFFF X FFFF A 04 B FF C 19 5 0043 530 P ElFF Y FFFF X FFFF 04 C 19 5 0043 BLT SE223 P E223 Y FFFF X FFFF A 04 B FF C 19 S 0043 g
41. a host system to an 8 bit or 16 bit microprocessor based system 5 S RECORD EXAMPLE Shown below is a typical S record format module as printed or displayed 00600004844521B 1130000285F245F2212226A000424290008237C2A 11300100002000800082629001853812341001813 113002041E900084E42234300182342000824A952 5107003000144 492 59030000 The above module consists of SO header record four S1 code data records S9 termination record The SO header record is comprised of the following character pairs SO 06 00 00 48 44 52 1 S record type SO indicating a header record Hexadecimal 06 decimal 6 indicating six character pairs or ASCII bytes follow Four character 2 byte address field zeroes ASCII D and R HDR Checksum of SO record The first 51 code data record is explained as follows 51 13 00 M68HC11EVB D S record type S1 indicating a code data record to be loaded verified at a 2 byte address Hexadecimal 13 decimal 19 indicating 19 character pairs representing 19 bytes of binary data follow Four character 2 byte address field hexadecimal address 0000 indicates location where the following data is to be loaded A 3 S RECORD INFORMATION M MOTOROLA The next 16 character pairs are the ASCII bytes of the actual program code data In this assembly language example the hexadecimal opcodes of the program are wri
42. addresses are not required to be changed to operate on revised versions of the BUFFALO monitor program 3 2 55 Command Table The command table consists of three lines for each entry The first byte is the number of characters in the command name The second entry is the ASCII command name The third entry is the starting address of the command module As an example FCB 3 3 characters in command name FCC ASM ASCII literal command name string FDB ASM Jump address for command module Each command in the BUFFALO program is a individual module Thus to add or delete commands all that is required is to include a new command module or delete an existing module and or delete the entry in the command table 3 3 INTERRUPT VECTORS Interrupt vectors residing in MCU internal ROM are accessible as follows Each vector is assigned a three byte field residing in EVB memory map locations 0000 S00FF This is where the monitor program expects the MCU RAM to reside Each vector points to a three byte field which is used as a jump table to the vector service routine Table 3 2 lists the interrupt vectors and associated three byte field M68HC11EVB D 3 5 MONITOR PROGRAM M MOTOROLA Table 3 2 Interrupt Vector Jump Table Interrupt Vector Serial Communications Interface Serial Peripheral Interface SPI Pulse Accumulator Input Edge Pulse Accumulator Overflow Timer Overflow Timer Output Compare 5 Timer Output Compare 4 T
43. ansfer to the EVB Upon completion of the S record transfer the following message is displayed done gt M68HC11EVB D 4 43 OPERATING INSTRUCTIONS AA MOTOROLA 4 84 IBM PC with KERMIT to EVB Prior to performing any IBM PC operation ensure that both IBM PC and EVB baud rates are identical and that the IBM PC asynchronous port is configured for terminal mode of operation If the asynchronous port is hard wired for host mode of operation and cannot be reconfigured for a terminal mode of operation the use a null modem transmit TxD and receive RxD and associated handshake lines are cross coupled is required NOTE IBM PC to EVB interconnection is accomplished by one RS 232C cable assembly This cable is connected to the EVB terminal I O port connector P2 for downloading operations To perform the IBM PC to EVB downloading procedure perform observe the following EXAMPLE DESCRIPTION C gt KERMIT lt CR gt IBM PC prompt Enter Kermit program IBM PC Kermit MS VX XX Type for help Kermit MS SET BAUD 9600 lt CR gt Set IBM PC baud rate Kermit MS gt CONNECT lt CR gt Connect IBM PC to EVB Connecting to host type Control C to return to PC CR gt LOAD T lt CR gt EVB download command via terminal port entered CTRL Kermit MS PUSH CR The IBM Personal Computer DOS Version X XX C Copyright IBM Corp 1981 1982 1983 C gt TYPE File Name gt COM1 lt CR g
44. approximately 300 milliseconds is present between successive characters sent to the host computer during the execution of the LOAD command in the monitor program The monitor program uses the MCU internal RAM located at 0048 00FF The control registers are located at 1000 103F The monitor program also uses Output Compare 5 OCS for the TRACE instruction therefore OC5 should not be used in user routines being traced M68HC11EVB D 4 1 OPERATING INSTRUCTIONS M MOTOROLA The EVB allows the user to use all the features of the BUFFALO evaluation software however it should be noted when designing code that the BUFFALO uses the MCU on chip RAM locations 0048 00FF leaving only 72 bytes for the user i e 0000 0047 The user must be aware of the BUFFALO monitor address location restrictions Table 4 1 lists the monitor memory map limitations Table 4 1 Monitor Memory Map Limitations Available to user BUFFALO sets default value of the user stack pointer at location 0047 1000 103F MCU control registers Although RAM and registers can be moved in the memory map BUFFALO expects RAM at 0000 actually requires 0048 00FF and registers at 1000 103F 4000 Some versions of EVBs have a D flip flop addressed at this location During initialization BUFFALO 3 2 writes 00 to location 4000 and various monitor operations cause 00 or 01 to be written to 4000 Refer to the buf25 asm file on the EVB diskette for the definition
45. assembler ASM lt address gt where address starting address for the assembler operation Assembler operation defaults to internal RAM if no address is given The assembler disassembler is an interactive assembler editor Each source line is converted into the proper machine language code and is stored in memory overwriting previous data on a line by line basis at the time of entry In order to display an instruction the machine code is disassembled and the instruction mnemonic and operands are displayed All valid opcodes are converted to assembly language mnemonics All invalid opcodes are displayed on the terminal CRT as ILLOP The syntax rules for the assembler are as follows a All numerical values are assumed to be hexadecimal Therefore no base designators e g hex binary etc are allowed b Operands must be separated by one or more space or tab characters c Any characters after a valid mnemonic and associated operands are assumed to be comments and are ignored Addressing modes are designated as follows Immediate addressing is designated by preceding the address with a sign b Indexed addressing is designated by a comma The comma must be preceded a one byte relative offset even if the offset is 00 and the comma must be followed by an X or Y designating which index register to use e g LDAA 00 X c Direct and extended addressing is specified by the length of the address operan
46. c Signal Name and Description 12V 12 Vdc Power Input voltage 12 Vdc 0 1 A used by the EVB logic circuits 3 5 Vdc Power Input voltage 5 Vdc 0 5 A used by the EVB logic circuits 12 Vdc Power Input voltage 12 Vdc 9 0 1 A used by the EVB logic circuits 6 6 M68HC11EVB D M MOTOROLA SUPPORT INFORMATION 6 3 PARTS LIST Table 6 5 lists the components of the EVB by reference designation order The reference designation is used to identify the particular part on the parts location diagram Figure 6 1 that is associated with the parts list table This parts list reflects the latest issue of hardware at the time of printing C2 C4 C5 ei U2 U3 U4 U5 P2 R R2 Ul J R3 Y1 R4 a 3 R5 J2 1 5 06 07 ug R6 D d U8 c18 u15 R9 R10 p 9 J7 U1 11 R14 ue C8 C9 C1
47. ctor flat ribbon cable assembly as shown in Figure 2 2 One end of the cable assembly is connected to the EVB connector P2 shown below The other end of the cable assembly is connected to the user supplied terminal For connector pin assignments and signal descriptions of the EVB terminal port connector P2 refer to Chapter 6 P2 GND 1 O RXD 2 o O 14 NC TD 15 NC NC 4 o O 16 NC CIS 5 O 17 NC DSR 6 o O 18 NC SIG GND 7 19 NC DCD 8 O 20 DTR NC 9 g O 21 NC NC 10 O 22 NC NC 11 23 NC NC 12 O 24 NC NC 13 o O 25 NC TERMINAL NOTE A dumb terminal or personal computer is always connected to the terminal I O port but it is very common not to have any external equipment connected to the host I O port 2 8 M68HC11EVB D M MOTOROLA HARDWARE PREPARATION AND INSTALLATION 2 4 3 Host Computer EVB Interconnection Interconnection of an RS 232C compatible host computer to the EVB is accomplished via a user supplied 20 or 25 conductor flat ribbon cable assembly as shown in Figure 2 2 One end of the cable assembly is connected to the EVB connector P3 shown below The other end of the cable assembly is connected to the user supplied host computer For connector pin assignments and signal descriptions of the EVB host port connector P3 refer to Chapter 6 P3 GND 1 O RXD 2 O 14 NC TD 15 NC NC 4 o O 16 NC NC 5 o O 17 NC DSR 6 o O 18 NC SIG GND 7
48. d 1 or 2 digits specifies direct 3 or 4 digits specifies extended Extended addressing can be forced by padding the address operand with leading zeros d Relative offsets for branch instructions are computed by the assembler Therefore the valid operand for any branch instruction is the branch if true address not the relative offset 4 8 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS ASM Assembler Disassembler When a new source line is assembled the assembler overwrites what was previously in memory If no new source line is submitted or if there is an error in the source line then the contents of memory remain unchanged Four instruction pairs have the same opcode so disassembly will display the following mnemonics e Arithmetic Shift Left ASL Logical Shift Left LSL displays as ASL e Arithmetic Shift Left Double ASLD Logical Shift Left Double LSLD displays as LSLD Branch if Carry Clear BCC Branch if Higher or Same BHS displays as BCC e Branch if Carry Set BCS Branch if Lower BLO displays as BCS If the assembler tries to assemble at an address that is not in RAM or EEPROM an invalid address message rom xxxx is displayed on the terminal CRT xxxx invalid address Assembler disassembler subcommands are as follows If the assembler detects an error in the new source line the assembler will output an error message and then reopen the same address location Assemble the current line and then disasse
49. d J7 should not have fabricated jumpers installed at the same time Jumper header J7 is for factory use only Jumper header J3 or J7 applies a chip enable CE signal to the RAM device installed at location U4 The RAM device is selected or deselected by the installation of a fabricated jumper on either jumper header J3 or J7 If the installed RAM device is not required but left installed both jumper headers J3 and J7 should not have fabricated jumpers installed Installing a fabricated jumper on jumper header J3 causes the memory device at location U4 to be mapped at locations 6000 to 7FFF Installing a fabricated jumper on jumper header J7 causes the memory device located at location U4 to be mapped at locations A000 to BFFF NOTE MCU EEPROM may be located at B600 to B7FF 2 4 M68HC11EVB D M MOTOROLA HARDWARE PREPARATION AND INSTALLATION 2 3 4 Program Execution Select Header 74 Jumper header J4 is used to determine whether the BUFFALO monitor prompt will be displayed or if a jump to internal EEPROM will be executed Upon reset the monitor detects the state of the PEO line If a low state is detected the monitor program is executed and the prompt displayed If a high state is detected the monitor will automatically jump directly to EEPROM address location B600 and execute user program code without displaying the monitor prompt The EVM is factory configured and shipped with the program execution selected for BUFFALO
50. ecific information on which S records are supported by a particular program the user manual for that program must be consulted NOTE The EVB monitor supports only the S1 and S9 records data before the first S1 record is ignored Thereafter all records must be S1 type until the S9 record terminates data transfer An S record format module may contain S records of the following types S0 The header record for each block of S records The code data field may contain any descriptive information identifying the following block of S records The address field is normally zeroes SI A record containing code data and the 2 byte address at which the code data is to reside 52 58 Not applicable to EVB S9 A termination record for a block of S1 records The address field may optionally contain the 2 byte address of the instruction to which control is to be passed If not specified the first entry point specification encountered in the object module input will be used There is no code data field Only one termination record is used for each block of S records Normally only one header record is used although it is possible for multiple header records to occur A 2 M68HC11EVB D M MOTOROLA S RECORD INFORMATION A 4 S RECORD CREATION S record format programs may be produced by several dump utilities debuggers or several cross assemblers or cross linkers Several programs are available for downloading a file in S record format from
51. ed S e 5 2 SA MEN RE 5 4 5 2 4 Address Decodimg De multiplexmpg 4 oe ern tent eh rere ran oen ie Een p oi e 5 4 3 25 2RS 232C WO Port Interface Circuits o ed add ed 5 4 CHAPTER 6 SUPPORT INFORMATION INTRODUCTION Fro e 6 1 6 2 CONNECTOR SIGNAL DESCRIPTIONS teda t ORE RUM nae ue 6 1 6 2 PARTS EIS aa M nene statute e osi ae eae 6 7 6 4 IDENGR AM 52556 Means 6 11 M68HC11EVB D vii CONTENTS M MOTOROLA APPENDIX A S RECORD INFORMATION ALI INDRODEUCIION ittinseiun meds tn Dee C we etd 1 A SRE CORE CONTEN eu eae aoa 1 A3 SRE CORD aut editis 2 AG S RECORD CREATION de A 3 AO S RECORD EXAMPLE ine ntc paalo A 3 APPENDIXB APPLICATIONS BJ INTZEODUCETIOBN S educa aedis B 1 FIGURES I 1 EVB Block Di graM RR e Dite rud bees 1 4 2 1 EVB Connector Switch and Jumper Header Location Diagram 2 2 2 2 Terminal Host Computer Cable Assembly 2 10 2 3 MCU Port Extension Cable Assembly Diagram eee 2 13 Dx EV B Block zoe eo eas
52. ements prior to target system installation Figure 2 1 illustrates the EVB connector switch and jumper header locations Use connector to connect the EVB to the target system Use connectors P2 and P3 to connect the EVB to the external terminal and host computer equipment respectively Use connector P4 to connect an external power supply to the EVB Use switch S1 to reset the EVB Jumper header locations J1 through J7 provide these capabilities e Reset select J1 e Clock select J2 e Memory select J3 and 77 e Program execution select J4 e Terminal baud rate select J5 e Host port RX signal disable J6 M68HC11EVB D 24 HARDWARE PREPARATION AND INSTALLATION M MOTOROLA SELECT 2 _ TERMINAL m PORT p SEG CONNECTOR CLOCK SELECT J4 PROGRAM EXECUTION J7 FACTORY USE da ONLY 51 CONNECTOR P d RESET SWITCH HOST PORT s RX SIGNAL POWER P3 DISABLE HOST PORT CONNECTOR 15 TERMINAL BAUD RATE SELECT oo000 i 12V 5 GND 12 Figure 2 1 EVB Connector Switch and Jumper Header Location Diagram 2 3 1 Reset Select Header J1 Jumper header J1 is used to connect an external reset signal from the target system via MCU I O port connector P1 pin
53. er to example on page 4 17 EXAMPLE DESCRIPTION gt G COOO CR Start execution at C000 P C005 Y 7982 00 44 B 70 C DO 5 004 Breakpoint encountered at C005 gt P lt CR gt Continue execution 007 7982 00 44 B 70 C CO 5 004 Breakpoint encountered at C007 4 26 M68HC11EVB D M MOTOROLA RM 4 6 15 Register Modify Dy yy GU OPERATING INSTRUCTIONS Register Modify The RM command is used to modify the MCU program counter P Y index Y X index X A accumulator A B accumulator B C accumulator C and stack pointer S register contents EXAMPLES gt RM lt CR gt P C007 7982 00 44 DESCRIPTION Display P register contents B 70 C CO S 0054 007 020 lt gt gt RM X lt CR gt 007 Y 7982 X FFOO 44 Modify P register contents Display X register contents 70 0 5 0054 00 020 lt gt gt RM lt CR gt Modify X register contents Display P register contents P C020 Y DEFE X C020 A DF P C020 SPACE BAR Y DEFE SPACE BAR X C020 SPACE BAR A DF SPACE BAR B DE SPACE BAR C D0 SPACE BAR S 0054 SPACE BAR gt M68HC11EVB D B DE 5 0054 Display remaining registers SPACE BAR entered following stack pointer display terminates RM command 4 27 OPERATING INSTRUCTIONS M MOTORO
54. eros d Relative offsets for branch instructions are computed by the assembler Therefore the valid operand for any branch instruction is the branch if true address not the relative offset Assembler disassembler subcommands are as follows If the assembler directs an error in the new source line the assembler will output an error message and then reopen the same address location Assemble the current line and then disassemble the same address location Assemble the current line and then disassemble the previous sequential address location CR Assemble the current line and then disassemble the next opcode address CTRL J Assemble the current line If there isn t a new line to assemble then disassemble the next sequential address location Otherwise disassemble the next opcode address CTRL A Exit the assembler mode of operation 4 34 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS When a new source line is assembled the assembler overwrites what was previously in memory If no new source line is submitted or if there is an error in the source line then the contents of memory remain unchanged Each of the instruction pairs Arithmetic Shift Left ASL Logical Shift Left LSL have the same opcode so disassembly always displays the ASL mnemonic If the assembler tries to assemble at an address that is not in RAM an invalid address message rom is displayed on the terminal CRT xxxx invalid address
55. follows Printable Field Characters Contents Type 2 S record type SO 51 etc Record length 2 The count of the character pairs in the record excluding the type and record length Address 4 6 8 The 2 3 or 4 byte address at which the data field is to be loaded into memory Code data 0 2n From 0 to n bytes of executable code memory loadable data or descriptive information For compatibility with teletypewriters some programs may limit the number of bytes to as few as 28 56 printable characters in the S record Checksum 2 The least significant byte of the one s complement of the sum of the values represented by the pairs of characters making up the record length address and the code data fields M68HC11EVB D 1 S RECORD INFORMATION M MOTOROLA Each record may be terminated with a CR LE NULL Additionally an S record may have an initial field to accommodate other data such as line numbers generated by some time sharing systems Accuracy of transmission is ensured by the record length byte count and checksum fields A 3 S RECORD TYPES Eight types of S records have been defined to accommodate the several needs of the encoding transportation and decoding functions The various Motorola upload download and other record transportation control programs as well as cross assemblers linkers and other file creating or debugging programs utilize only those S records which serve the purpose of the program For sp
56. he BUFFALO monitor program consists of five parts or sections which are as follows e Initialization e Command interpreter T O routines e Utility subroutines e Command table 3 2 1 Initialization This part of BUFFALO contains all of the reset initialization code In this section internal RAM locations are set up and the I O channel for the terminal is set up To set up the terminal I O port BUFFALO must determine if the terminal is connected to the SCI or to an external ACIA or DUART This is accomplished by sending a sign on message to all ports and then waiting for the user to type carriage return RETURN on whichever device is the terminal port When M68HC11EVB D 3 1 MONITOR PROGRAM M MOTOROLA BUFFALO recognizes a carriage return from a port that port is then used for all subsequent terminal I O operations 3 2 2 Command Interpreter The next section of BUFFALO is the command interpreter American Standard Code for Information Interchange ASCII characters are read from the terminal into the input buffer until a carriage return or a slash is received The command field is then parsed out of the input buffer and placed into the command buffer A table of commands is then searched and if a match is found the corresponding command module is called as a subroutine All commands return control back to the command interpreter upon completion of the operation 3 2 3 W O Routines The I O section of BUFFALO consists
57. he single chip mode as shown in Figure C 1 The only terminal interface is through the SCI port Internally there are 54 bytes of RAM starting at 0000 and 512 bytes internal EEPROM which can be used for developing user programs M68HC11EVB D B 1 RS 232C 5V CONNECTOR 100uF CND KT Te SIG GND 45V 7 Vss op 1488 TXD PD1 TXD 5 VRL PDO RXD gt 5V MODA 502 PDA ay PDS 741514 550 4 7K PD67AS lt me AAA AN rane PD7 RW CTS 4 7K S E ARS gt gt s AM IRQ 4 7K AM XIRQ DSR aL gt gt e EXTAL RST 5V DCD lt gt z 10M XTAL 8 MHz DTR m PAO PBO 2 1 1 4 7K PA2 PB2 PAS PBS 4 PAS PBS 2uF PAG PB6 8 PB7 RESET 30pF 30pF RN d 4 7K MC68HC11 2N3904 NOTES EC 44K 1 UNLESS OTHERWISE SPECIFIED la PAZ 2 ALL RESISTORES ARE IN OHMS 5 1 4W PCA ALL CAPCITORS ARE IN uF PAS PCS PAS ALL VOLTAGES ARE DC PA7 PC7 2 TIE UNUSED INPUTS TO 5V Vpp OR GROUND GND Figure C 1 Single Chip Mode Configuration B 2 M68HC11EVB D
58. imer Output Compare 3 Timer Output Compare 1 Timer Input Capture 3 Timer Input Capture 2 Timer Input Capture 1 Real Time Interrupt XIRQ Software Interrupt SWI Illegal Opcode SCI Computer Operating Properly COP Clock Monitor 00C7 00C9 00C4 00C6 00 D2 00 D5 001 E4 E E2 00 001 ED 00 EE 500 0 To use vectors specified in Table 3 2 the user must insert a jump extended opcode in the three byte field of the vector required For an example for the IRQ vector the following is performed 1 Place 7E JMP at location 00 2 Place IRQ service routine address at locations 00 and 00 0 The following is an example where the IRQ service routine starts at 0100 500 01 3 6 00 JMP IRO SERVICE M68HC11EVB D M MOTOROLA MONITOR PROGRAM During initialization BUFFALO checks the first byte of each set of three locations If a 7E jump opcode is not found BUFFALO will install a jump to a routine called STOPIT This assures there will be no uninitialized interrupt vectors which would cause undesirable operation during power up and power down If an interrupt is accidentally encountered the STOPIT routine will force a STOP instruction sequence to be executed A user may replace any of the JMP STOPIT instructions with a JMP to a user written interrupt service routine If reset is issued via swi
59. l int BUFFALO monitor prompt is displayed 5 Memory modify MM command refer to paragraph 4 6 11 is used to change CONFIG register contents to 0D BUFFALO monitor will respond with rom message 6 Press reset switch S1 External ext BUFFALO monitor prompt is displayed Proceed to Chapter 4 for complete operating instructions 2 14 M68HC11EVB D M MOTOROLA MONITOR PROGRAM CHAPTER 3 MONITOR PROGRAM 31 INTRODUCTION This chapter provides the overall description of the monitor program This description will enable the user to understand the basic structure of the program and to modify or customize the program for specific applications 3 2 PROGRAM DESCRIPTION The monitor program supplied for the EVB is called BUFFALO Bit User Fast Friendly Aid to Logical Operations This program communicates the MC6850 Asynchronous Communications Interface Adapter ACIA device and the MCU Serial Communications Interface SCI Refer to the buf25 asm file on the EVB diskettes for additional information pertaining to the monitor BUFFALO program The EVB monitor program is contained in EPROM external to the MCU The EVB resident MCU have the configuration CONFIG register ROMON bit cleared thereby disabling the MCU internal ROM Having the monitor program in EPROM external to the MCU at locations E000 FFFF is a great advantage because it allows the user to add instructions to customize the monitor for specific requirements T
60. lowing subcommands are recognized CTRL J or SPACE BAR or Examine modify next location CTRL H or or Examine modify previous location Examine modify same location CR Terminate MM operation O Compute branch instruction relative offset If an invalid address is specified the invalid address message rom is displayed on the terminal CRT M68HC11EVB D 4 23 OPERATING INSTRUCTIONS M MOTOROLA Memory Modify CAUTION Caution should be observed when modifying EEPROM locations EVB MCU CONFIG register ROMON bit is cleared to disable MCU internal ROM EXAMPLES gt MM C700 lt CR gt C700 44 66 lt CR gt C700 66 55 C6FF FF AA lt CR gt gt MM C13C lt CR gt C13C F7 18 51 lt CR gt 13C F7 Q gt C000 lt CR gt C000 55 80 C2 00 CE C4 gt MM B600 lt CR gt B600 73 52 lt CR gt gt MM B600 lt CR gt B600 52 gt DESCRIPTION Display memory location C700 Change data at C700 and reexamine location Change data at C700 and backup one location Change data at C6FF and terminate MM operation Display memory location Compute offset result 51 Examine location C000 Examine next location s using SPACE BAR Examine EEPROM location B600 Change data at location B600 Reexamine EEPROM location B600 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS MOVE MOVE 4 6 13 Move MOVE lt addressl gt address2 lt dest gt where
61. mble the same address location Assemble the current line and then disassemble the previous sequential address location CR Assemble the current line and then disassemble the next opcode address CTRL J Assemble the current line If there isn t a new line to assemble then disassemble the next sequential address location Otherwise disassemble the next opcode address CTRL A the assembler mode of operation M68HC11EVB D 4 9 OPERATING INSTRUCTIONS AA MOTOROLA ASM Assembler Disassembler EXAMPLES DESCRIPTION gt ASM C000 lt CR gt C000 STX SFFFF gt LDAA 55 lt CR gt Immediate mode addressing requires before 86 55 operand C002 STX SFFFF gt STAA CO CR Direct mode addressing 97 CO C004 STX SFFFF gt LDS 0 X CR Index mode if offset 0 X will not be accepted AE 00 C006 STX SFFFF BRA C500 CR Branch out of range message Branch out of range C006 STX SFFFF gt BRA C030 CR Branch offsets calculated automatically address 20 28 required as branch operand C008 STX SFFFF gt Assembler operation terminated gt NOTE Above example memory locations 000 008 contain FF data which disassembles to STX FFFF Refer to the end of this chapter for additional operational information pertaining to the use of the assembler disassembler 4 10 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS BF Block Fill 4 6 2 Block Fill lt addressl gt addre
62. monitor operation as shown below The user must configure the EVB for the type of program execution required If program execution out of EEPROM is desired the jumper is repositioned between pins 2 and 3 J4 oe e 1 2 3 Monitor EEPROM 10K PULLDOWN 10K PULLUP If the PEO line is used for A D operations the loading condition introduced by jumper header J4 may not be desired To circumvent this condition program the first three EEPROM locations with 7E E0 and 0A respectively Next remove installed jumper from jumper header J4 removes load condition and proceed into the A D operation For additional information pertaining to the EEPROM jump operation described above refer to the buf25 asm file on the EVB diskettes M68HC11EVB D 2 5 HARDWARE PREPARATION AND INSTALLATION 2 3 5 Terminal Baud Rate Select Header J5 AA MOTOROLA Jumper header J5 is used to select the baud rate for the terminal P2 I O port The EVB is factory configured and shipped with the terminal baud rate selected for 9600 baud as shown below J5 1 2 3 4 5 6 7 8 9 10 11 12 300 BAUD 600 BAUD 1200 BAUD 2400 BAUD 4800 BAUD 9600 BAUD BAUD RATE SELECTION The host P3 I O port is a fixed MCU SCI 9600 baud rate non selectable Refer to Chapter 6 EVB parts list notes for additional information pertaining to the host baud rate crystal vs E clock vs MCU SCI operation 2 6 M68HC11EVB D M MOTOROLA HARDWARE PREP
63. mputer program stored in the Read Only Memory of the device contains material copyrighted by Motorola Inc first published 1985 and may be used only under a license such as the License For Computer Programs Article 14 contained in Motorola s Terms and Conditions of Sale Rev 1 79 EXORCiser is a trademark of Motorola Inc IBM PC is a registered trademark of International Business Machines Corp Apple MacTerminal MacWrite are trademarks of Apple Computer Inc Macintosh is a trademark licensed to Apple Computer Inc Macintosh is a trademark of Macintosh Laboratory Inc Red Ryder is a trademark of Freesoft Company Motorola and the Motorola logo are registered trademarks of Motorola Inc Motorola Inc is an Equal Opportunity Affirmative Action Employer CAUTION Caution should be observed when programming or erasing MCU EEPROM locations The EVB MCU configuration CONFIG register ROMON bit is cleared to disable MCU internal ROM thereby allowing external EPROM containing the BUFFALO program to control EVB operations M MOTOROLA CONTENTS CONTENTS CHAPTER 1 GENERAL INFORMATION I3 INTRODUCTION rai e e HERE GEM E Ibn Qu a Ut n pe tn 1 1 L2 THEA TURES ete Metus pe Suction e deu 1 1 1 3 SPECIFICATION aucun oi etal odes 1 2 l4 GENERAL DESCRIPTION poete ot ear e t En aod Ace es 1 3 1 5 EQUIPMENT REQUIRED iai ttti epa t re idee atu
64. ne input is entered when the keyboard CR key is depressed Typical example of this explanation is as follows gt MD 000 F100 lt CR gt M68HC11EVB D 4 5 OPERATING INSTRUCTIONS 4 6 AA MOTOROLA Table 4 2 Monitor Program Commands ASM lt address gt ASSEM BF lt addr1 gt lt addr2 gt lt data gt BR lt address gt BREAK BULK BULKA BULKALL CALL lt address gt COPY DUMP ERASE FILL G lt address gt GO HELP HOST LOAD lt host download command gt LOAD lt T gt MEMORY MD lt addr1 gt lt addr2 gt MM lt address gt MOVE lt addr1 gt lt addr2 gt lt dest gt PROCEED Download S records via host port 2 Download S records via terminal port M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS Table 4 2 Monitor Program Commands continued m VERIFY host download command Compare memory to download data via host port VERIFY lt T gt Compare memory to download data via terminal port XBOOT lt address1 gt lt address2 gt Send program to another M68HC11 via bootstrap mode same as HELP lt gt same as MM lt address gt NOTES 1 On newer mask sets of MC68HC11 CONFIG can only be changed in special test or bootstrap modes of operation 2 Refer to Appendix A for S record information M68HC11EVB D 4 7 OPERATING INSTRUCTIONS AA MOTOROLA ASM Assembler Disassembler 4 6 1 Assembler Dis
65. next byte Convert binary byte at address in index register X to two ASCII characters and output followed by a space Returns address in index register X pointing to next byte Convert two consecutive binary bytes starting at address in index register X to four ASCII characters and output followed by a space Returns address in index register X pointing to next byte FFC4 OUTCRL Output ASCII carriage return followed by a line feed FFC7 OUTSTR Output string of ASCII bytes pointed to by address in index register X until character is an end of transmission 04 FFCA OUTSTO Same as OUTSTR except leading carriage return and line feed is skipped Input ASCII character to accumulator A and echo back This routine loops until character is actually received FFCD FFDO INCHAR VECINIT Used during initialization to preset indirect interrupt vector area in RAM This routine or a similar routine should be included in a user program which is invoked by the jump to B600 feature of BUFFALO M68HC11EVB D M MOTOROLA MONITOR PROGRAM When accessing BUFFALO utility routines always reference the routines by the applicable address SFF7C through FFDO in the jump table rather than the actual address in the BUFFALO monitor program Jump table addresses remain the same when a new version of BUFFALO is developed even though the actual addresses of the routine may change Programs that reference routines by the jump table
66. nload command download S records to EVB via host port T download S records to EVB via terminal port The LOAD command moves downloads object data in S record format see Appendix A from an external host computer to EVB As the EVB monitor processes only valid S record data it 1s possible for the monitor to hang up during a load operation If an S record starting address points to an invalid memory location the invalid address message error addr xxxx is displayed on the terminal CRT xxxx invalid address EXAMPLES DESCRIPTION gt LOAD cat trial out CR LOAD command entered to download data from host cat trial out computer to EVB via host port done gt gt LOAD cat trial out lt CR gt LOAD command entered cat trial out error addr E000 Invalid address message gt S records must be downloaded into RAM Refer to the downloading procedures at the end of this chapter for additional information pertaining to the use of the LOAD command M68HC11EVB D 4 21 OPERATING INSTRUCTIONS M MOTOROLA MD Memory Display 4 6 11 Memory Display MD addressi lt address2 gt where lt address1 gt Memory starting address optional lt address2 gt Memory ending address optional The MD command allows the user to display a block of user memory beginning at address1 and continuing to address2 If address2 is not entered 9 lines of 16 bytes are displayed beginning at addressl If addressl is grea
67. nterconnection is accomplished via the EVB MCU I O port connector and a 60 conductor flat ribbon extension cable assembly This MCU I O port connector P1 shown on the following page is a 60 pin header that facilitates the interconnection of the cable assembly for evaluation purposes For connector pin assignments and signal descriptions of the EVB MCU I O port connector P1 refer to Chapter 6 Two types of extension cable assembly construction techniques are available to the user Cable assembly construction is dependent upon the purpose or use of the EVB The user must first determine the primary application of the EVB in order to determine the type of cable assembly to be constructed Cable assembly types and construction methods are described in the following paragraphs The first type of cable assembly user supplied is low cost and simplest to construct and is illustrated in Figure 2 3 This type of assembly provides an indirect connection of the EVB MCU I O port to the target system MCU device socket Indirect connection is accomplished via a 60 pin connector installed on the target system board that connects to the target system MCU device socket This connector is a double row post 60 pin header type Amptronics 929715 01 30 Target system wiring from the connector to the MCU device socket is implemented via wire wrap or Printed Wiring Board PWB conductive land wiring Uses for this type of cable assembly are in the early development
68. of a set of supervisor routines and three sets of driver routines The supervisor routines are INIT INPUT and OUTPUT These routines determine which driver subroutine to call to perform the specific action Each set of driver routines consists of an initialization routine an input routine and an output routine One set of drivers is for the SCI port and these routines are called ONSCI INSCI and OUTSCI The second set of drivers is for a DUART and these routines are called ONUART INUART and OUTUART The third set of drivers is for an ACIA and these routines are called ONACIA INACIA and OUTACIA All I O communications are controlled by three RAM locations IODEV EXTDEV and HOSTDEV EXTDEV specifies the external device type 0 1 2 DUART HOSTDEV specifies which I O port is used for host communications O SCI 1 3 DUARTB IODEV instructs the supervisor routine which port driver routine to use O SCI 1 2 DUARTA 3 DUARTB The INIT routines set up a serial transmission format of eight data bits one stop bit and no parity For the SCI the baud rate is set to 9600 for an 8 MHz crystal 2 MHz E clock A different baud rate can be achieved by modifying address location 102B refer to MCU data sheet SCI baud rate selection The INPUT routine reads from the specified port If a character is received the character is returned in accumulator A If no character is received a zero is returned in acc
69. p 3 2 CX MESS UME ia T 3 2 old Utility Subroutines ei Ines edt 3 3 22223 Command eie eH ES RO Sida d Hwa de tq MT 3 5 39 INTERRUPT VECTORS tee Ma See On EHE 3 5 CHAPTER 4 OPERATING INSTRUCTIONS 4 1 INTRODUGHON 42 deceat Dee eb qutd 4 4 2 CONDROE S 4 4 3 LIMITATIONS dose cscs ton toe ua Sek 4 1 44 OPERATING PROCEDURES 4 3 AA Debuesine Mode eoo a Ate atu E de did 4 3 44 2 Evaluation WOR poet ME ny 4 3 4 4 3 Monitor Prostam eode oe pO ute betae 4 3 AS COMMAND LINE FORMAT te EINE RE OM eV a 4 4 4 0 MONITOR COMM ANIS i viec Na Rr atin a eae ec be ti 4 5 25 1 Assemblet i eo Atene NR etude aam 4 8 4 6 2 4 11 20 5 Breakpoint Seter aier 4 12 46A Bulk eese A Eten EMO esd ee ac a RN OS eut 4 14 AGS te ters atte C teta 4 15 4 6 6 sea ced NON 4 16 4 6 7 EEPROM Modify 4 1 1 111 2 0 6 eene ann inno annee 4 18 ntis Go cc 4 19 2 68 97 ea ey 4 20 4 6107 Ps 4 21 Z6 T1 Memory
70. riget ns n Sides 1 4 CHAPTER 2 HARDWARE PREPARATION AND INSTALLATION 2 n oj se dede ie Ev 2 1 24 UNPACKING INSTRUCTIONS 2 1 2 3 HARDWARE PREPARATION titted Staite aes diia a ne 2 1 2221 ResetSelect Header 2 2 2 54 Clock Select Header J2 eiecti ede e ree seat s Oso Deua 2 3 23 3 Memory Select Headers 13 and 17 5c 2 4 2 3 4 Program Execution Select Header 4 eei peel 2 5 2 3 5 Terminal Baud Rate Select Header 75 0000000000100 2 6 2 3 6 Host Port RX Signal Disable Header 76 5 22502 2 7 2 4 INSTALLATION INSTRUCTIONS i eir E E PORTU 2 7 2 4 1 Power Supply EVB Interconnection 2 7 2 4 2 Temnnal EVB Intercomnneetlotr eb 2 8 2 4 3 Host Computer EVB Interconnection eio retener decade deren iu 2 9 2 4 4 Target System EVB 2 11 23 CHECKOUT PROCEDURE 2 14 M68HC11EVB D CONTENTS M MOTOROLA CHAPTER 3 MONITOR PROGRAM Su INTRODUCTION s diui asi eta parten aiu ecu 3 1 3 2 PROGRAM DESCRIPTION inrer VEU DE ad nn oes 3 1 321 EET D TOES 3 1 Command Interpreten dee
71. s of DFLOP TARGCO and HOSTCO for additional information Since the EVB has no memory or peripherals located at 4000 these writes should not concern most EVB users D000 DOOF BUFFALO supports serial I O to a terminal and or host via a DUART external IC located at D000 in the memory map During initialization BUFFALO 3 2 reads and writes to location DOOC to see if a DUART is present in the system Refer to the buf25 asm file on the EVB diskette 4 2 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS 4 4 OPERATING PROCEDURES The EVB is a simplified debugging evaluating tool designed to operate in either the debugging or evaluation emulation mode of operation Jumper header J4 is used to determine whether the BUFFALO monitor prompt will be displayed or if a jump to internal EEPROM will be executed Refer to paragraph 2 3 4 for additional program execution selection information Upon reset the monitor detects the state of the PEO line If a low state is detected the monitor program is executed and the prompt displayed If a high state is detected the monitor will automatically jump directly to EEPROM address location B600 and execute user program code without displaying the monitor prompt 441 Debugging Mode The first mode of operation allows the user to debug user code under control of the monitor program User code can be assembled in one of two methods The first method is to assemble code using the line assembler in
72. s table The SWI service routine saves and displays the internal machine state then restores the original opcodes at the breakpoint location before returning control back to the monitor program SWI opcode cannot be executed or breakpointed in user code because the monitor program uses the SWI vector Only RAM locations can be breakpointed Branch on self instructions cannot be breakpointed COMMAND FORMATS DESCRIPTION BR Display all current breakpoints BR lt address gt Set breakpoint BR addrl addr2 Set several breakpoints BR Remove all breakpoints BR lt 1 gt lt addr2 gt Remove addrl and add lt addr2 gt BR addrl lt addr2 gt Add lt addrl gt clear all entries then add lt addr2 gt BR addrl1 lt addr2 gt Add lt addrl gt then remove lt addr2 gt 4 12 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS BR Breakpoint Set EXAMPLES DESCRIPTION gt BR C003 lt CR gt Set breakpoint at address location C003 0000 0000 0000 gt gt BR C003 C005 C007 COO9 CR Sets four breakpoints Breakpoints at same address C003 C005 C007 C009 will result in only one breakpoint being set gt gt BR lt CR gt Display all current breakpoints C003 C005 C007 C009 gt gt BR C009 CR Remove breakpoint at address location C009 C005 C007 0000 gt gt BR C009 lt CR gt Clear breakpoint table and add C009 C009 0000 0000 0000 gt gt BR
73. splayed upon completion of the bulkall EEPROM and configuration register erase operation User must verify erase operation by examining EEPROM locations or the configuration register location using the MM or MD command CAUTION Caution should be observed when erasing MCU EEPROM locations EVB MCU configuration CONFIG register ROMON bit is cleared to disable MCU internal ROM thereby allowing external EPROM containing the BUFFALO program to control EVB operations EXAMPLE DESCRIPTION gt BULKALL lt CR gt Bulk erase all MCU EEPROM B600 B7FF and configuration register 103F locations gt Prompt indicates erase sequence completed M68HC11EVB D 4 15 OPERATING INSTRUCTIONS M MOTOROLA CALL CALL 4 6 6 Call CALL lt address gt where address starting address where user program subroutine execution begins The CALL command allows the user to execute a user program subroutine Execution starts at the current program counter PC address location unless a starting address is specified Two extra bytes are placed onto the stack before the return from interrupt RTI is issued so that the first unmatched return from subroutine RTS encountered will return control back to the monitor program Thus any user program subroutine can be called and executed via the monitor program Program execution continues until a breakpoint is encountered or the EVB reset switch S1 is activated pressed Example program for CA
74. ss2 data where lt address1 gt Lower limit for fill operation lt address2 gt Upper limit for fill operation data pattern hexadecimal value The BF command allows the user to repeat a specific pattern throughout a determined user memory range If an invalid address is specified an invalid address message rom xxxx is displayed on the terminal CRT xxxx invalid address EXAMPLES DESCRIPTION gt BF C000 C030 FF CR Fill each byte of memory from C000 through C030 with data pattern FF gt BF C000 000 0 Set location C000 to 0 M68HC11EVB D 4 11 OPERATING INSTRUCTIONS M MOTOROLA BR Breakpoint Set 4 6 3 Breakpoint Set BR lt address gt where removes clears all breakpoints Kaddress gt removes individual or multiple addresses from breakpoint table The BR command sets the address into the breakpoint address table During program execution a halt occurs to the program execution immediately preceding the execution of any instruction address in the breakpoint table A maximum of four breakpoints may be set After setting the breakpoint the current breakpoint addresses if any are displayed Whenever the G CALL or P commands are invoked the monitor program inserts breakpoints into the user code at the address specified in the breakpoint table Breakpoints are accomplished by the placement of a software interrupt SWI at each address specified in the breakpoint addres
75. stages of the MC68HC11 MCU based product The second type of cable assembly not illustrated is expensive and hardest to construct This type of assembly provides a direct connection of the EVB MCU I O port to the target system MCU device socket Direct connection is accomplished via a specialized plug platform containing a 52 lead plastic leaded chip carrier PLCC plug constructed by the user This type of plug platform mates directly with the target system MCU device socket Uses for this type of cable assembly are in the production stages of the developed MC68HC11 MCU based product M68HC11EVB D 2 11 HARDWARE PREPARATION AND INSTALLATION AA MOTOROLA 1 GND 2 MODB NC 4 STRA E 6 STRB EXTAL 8 XTAL PCO 10 PC1 PC2 12 PC4 14 PC5 PC6 16 PC7 RESET 18 IRQ 20 PDO PD1 22 PD2 PD3 24 PD4 PD5 26 7 28 PAG PA5 30 PA4 PA3 32 PA2 1 34 PB7 36 6 5 38 4 40 PB2 1 42 PBO PEO 44 4 1 46 48 PEG PE3 50 VRL 52 VRH NC 54 NC NC 56 NC NC 58 NC NC 60 NC MCU I O PORT 2 12 M68HC11EVB D M MOTOROLA
76. t M68HC11EVB D 4 29 OPERATING INSTRUCTIONS M MOTOROLA TM Transparent Mode 4 6 18 Transparent Mode TM The TM command connects the EVB host port to the terminal port which allows direct communication between the terminal and the host computer All I O between the ports are ignored by the EVB until the exit character is entered from the terminal The TM subcommands are as follows CTRL A Exit from transparent mode CTRL B Send break to host computer EXAMPLE DESCRIPTION gt TM lt CR gt Enter transparent mode appslab login ED lt CR gt Host computer login response Password XXXX lt CR gt XXXX host computer password System Message 5 CTRL A Task completed Enter exit command gt Exit transparent mode Refer to the downloading procedures at the end of this chapter for additional information pertaining to the use of the TM command 4 30 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS VERF Verify 4 6 19 Verify VERIFY lt host download command gt lt T gt where lt host download command gt Compare memory to host port download data lt T gt compare memory to terminal port download data The VERIFY command is similar to the LOAD command except that the VERIFY command instructs the EVB to compare the downloaded S record data to the data stored in memory EXAMPLES DESCRIPTION gt VERIFY cat trial out CR Enter verify command cat trial out done Verification completed
77. t Motorola S record file name C gt EXIT lt CR gt S record downloading completed Kermit MS gt CONNECT lt CR gt Return to EVB monitor program gt CTRL C Kermit MS gt EXIT lt CR gt Exit Kermit program 4 44 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS 4 85 with PROCOMM to EVB To perform the IBM PC to EVB downloading procedure with perform observe the following 1 22 Invoke the PROCOMM EXE program Setup PROCOMM to match EVB baud rate and protocol type AIt S then the number 2 as follows 9600 baud no parity 8 bits 1 stop bit full duplex Setup ASCII transfer parameters type AIt S then the number 6 as follows Echo Local Yes Expand Blank Lines Yes Pace Character 0 Character pacing 25 1 1000 second Line Pacing 10 CR Translation None LF Translation None Save above settings to disk for future use Apply power to EVB 5 Press IBM PC keyboard carriage return CR key to display applicable EVB monitor prompt Enter EVB monitor download command as gt LOADT Press RETURN after entering LOAD T Instruct PROCOMM to send the S record file by pressing the Pg Up key on the PC then follow PROCOMM instructions on the display screen to select the S record file Motorola S record file is now transferred to the EVB Upon completion of the S record transfer the following message is displayed done gt M68HC11EVB D 4 45 OPERATING INSTRUCTIONS M M
78. tch S1 BUFFALO will not overwrite these user jump instructions so they need not be re initialized after every reset M68HC11EVB D 3 7 MONITOR PROGRAM 3 8 M MOTOROLA M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS CHAPTER 4 OPERATING INSTRUCTIONS 4 4 INTRODUCTION This chapter provides the necessary information to initialize and operate the EVB in a target system environment Information consists of the control switch description operating limitations command line format monitor commands and operating procedures The operating procedures consist of assembly disassembly and downloading descriptions and examples 4 2 CONTROL SWITCH The EVB contains a user reset switch S1 This switch is a momentary action push button switch that resets the EVB MCU circuits 4 3 LIMITATIONS CAUTION Caution should be observed when programming or erasing MCU EEPROM locations EVB MCU configuration CONFIG register ROMON bit is cleared to disable MCU internal ROM thereby allowing external EPROM containing the BUFFALO program to control EVB operations The MC68HC11 MCU SCI has been set for 9600 baud using a 2 MHz E clock external bus This baud rate can be changed by software by reprogramming the BAUD register in the ONSCI subroutine of the BUFFALO monitor program Refer to the buf25 asm file on the EVB diskettes for additional information pertaining to the ONSCI subroutine As the RS 232C handshake lines are not used a delay of
79. ter than address2 the display will default to the first address If no addresses are specified 9 lines of 16 bytes are displayed near the last memory location accessed EXAMPLES gt MD E61F lt CR gt E61F 42 55 46 46 41 4C 4F 20 33 2E 32 20 28 69 6E 74 29 20 2D 20 42 69 74 20 55 73 65 72 20 46 61 73 74 20 46 72 69 65 6E 64 6C 79 20 41 69 64 20 74 6F 20 4C 6F 67 69 63 61 6C 20 4F 70 65 72 61 gt gt MD C030 C020 lt CR gt C030 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FE gt gt MD C000 C020 lt CR gt C000 86 04 B7 01 01 01 01 39 FF FF FF FF FF FF 9 C010 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FE C020 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FE gt 4 22 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS MM Memory Modify 4 6 12 Memory Modify MM lt address gt where address is the memory location at which to start display modify CAUTION Caution should be observed when modifying EEPROM locations EVB MCU CONFIG register ROMON bit is cleared to disable MCU internal ROM The MM command allows the user to examine modify contents in user memory at specified locations in an interactive manner The MM command will also erase any EEPROM location and will reprogram the location with the corresponding value EEPROM locations treated as if RAM Once entered the MM command has several sub modes of operation that allow modification and verification of data The fol
80. the BUFFALO monitor program via the EVB user RAM C000 DFFF The second method is to assemble code on a host computer and then download the code to the EVB user RAM via Motorola S records The monitor program is then used to debug the assembled user code Having the monitor program in EPROM external to the MCU 000 FFFF allows the user to add instructions to customize the monitor for specific requirements 4 4 Evaluation Mode The second mode of operation allows the user to evaluate emulate user code in a target system environment utilizing the memory of the MC68HC11 MCU This is accomplished by relocating the code from locations C000 DFFF EVB user RAM to E000 SFFFF MCU 8k ROM MCU locations 0000 00FF RAM and B600 B7FF EEPROM are also available to the user The EVB then emulates an EPROM equivalent of the masked ROM device in the single chip mode of operation The EVB emulates as if in a single chip mode of operation even though operating in the expanded multiplexed mode of operation at all times 4 4 3 Monitor Program The monitor BUFFALO program is the resident firmware for the EVB which provides a self contained operating environment The monitor interacts with the user through predefined commands that are entered from a terminal The user can use any of the commands supported by the monitor M68HC11EVB D 4 3 OPERATING INSTRUCTIONS M MOTOROLA A standard input routine controls the EVB operation while the user t
81. trol depending on the version of BUFFALO and how the file transfer program terminates the download operation There is a problem which occurs when using the EVB with the MacTerminal program when performing a downloading operation The MacTerminal program sends a carriage return and line feed characters at the end of the downloaded S record file The EVB monitor treats this as a erroneous command you must RESET the EVB to regain control of the monitor 4 42 M68HC11EVB D M MOTOROLA OPERATING INSTRUCTIONS 4 8 3 Apple Macintosh with Red Ryder to EVB The Red Ryder downloading program in this application is also used as a terminal emulator for the Apple Macintosh computer To download a Motorola S record file from the Apple Macintosh computer to the EVB perform the following steps 1 Launch Red Ryder program 2 Setup computer program to match EVB baud rate typically as follows 9600 baud no parity 8 bits 1 stop bit full duplex 3 Apply power to EVB 4 Press Apple Macintosh computer keyboard carriage return CR key to display applicable EVB monitor prompt 5 Enter EVB monitor download command as follows gt LOADT Press RETURN after entering LOAD 6 Operate pull down File menu and select choose Send File ASCII 7 Use dialog box and select applicable S record object file Click on Send Motorola S record file is now transferred to the EVB NOTE S record file will not be displayed during the file tr
82. tten in sequence in the code data fields of the S1 records Opcode Instruction 28 5F BHCC 0161 24 5F BCC 0163 22 12 BHI 0118 22 6A BHI 0172 00 04 24 BRSET 0 04 012F 29 00 BHCS 010D 08 23 7C BRSET 4 23 S5018C Balance of this code is continued in the code data fields of the remaining S1 records and stored in memory location 0010 etc 2 Checksum of the first S1 record The second and third S1 code data records each also contain 13 19 character pairs and are ended with checksums 13 and 52 respectively The fourth S1 code data record contains 07 character pairs and has a checksum of 92 The S9 termination record is explained as follows 59 S record type S9 indicating a termination record 03 Hexadecimal 03 indicating three character pairs 3 bytes follow 00 Four character 2 byte address field zeroes 00 FC Checksum of S9 record Each printable character in an S record is encoded in hexadecimal ASCII in this example representation of the binary bits which are actually transmitted For example the first S1 record above is sent as shown below LENGTH ADDRESS CODE DATA CHECKSUM 0101 0011 0011 0001 00111 00011 0011 0011 0011 0000 0011 0000 0011 0000 0011 0000 0011 0010 0011110001 0011 0101 0100 0011 0010 0100 0001 A 4 M68HC11EVB D M MOTOROLA APPLICATIONS APPENDIX B APPLICATIONS B 1 INTRODUCTION BUFFALO can be used with the MC68HC11 MCU in t
83. u evaluate emulate user code in a target system environment utilizing the memory of the MC68HC11 MCU The EVB emulates the single chip mode of operation even though the EVB operates in the expanded multiplexed mode of operation at all times Overall evaluation debugging control of the EVB is provided by the BUFFALO monitor program via terminal interaction The target system interface is provided by the MCU and PRU devices RS 232C terminal host I O port interface circuitry provides communication and data transfer operations between the EVB and external terminal host computer devices Independent baud rate selection capabilities are provided for the terminal and host I O ports Hardware selectable 300 9600 baud rates are provided for the ACIA based terminal port A non selectable fixed 9600 baud rate is provided for the host port via the MCU Serial Communications Interface SCI The EVB requires a user supplied 5 12 and 12 Vdc power supply and an RS 232C compatible terminal for operation An RS 232C compatible host computer is used with the EVB to download Motorola S records via the BUFFALO monitor commands The Motorola S record format was devised for the purpose of encoding programs or data files in a printable format for transportation between computer systems The transportation process can therefore be monitored and the S records can be easily edited Refer to Appendix A for additional S record information M68HC11EVB D 1 3 GEN
84. umulator A This routine does not wait for a character to be received before returning function is performed by the INCHAR subroutine The OUTPUT routine takes the ASCII character in accumulator A and writes to the specified I O port This routine waits until the character is transmitted before returning 3 2 M68HC11EVB D M MOTOROLA MONITOR PROGRAM 3 2 4 Utility Subroutines Several subroutines exist that are available for performing I O tasks A jump table has been set up in ROM directly before the interrupt vectors To use these subroutines execute a jump to subroutine JSR command to the appropriate entry in the jump table By default all I O performed with these routines are sent to the terminal port Redirection of the I O port is achieved by placing the specified value O SCI 1 ACIA 2 DUARTA 3 DUARTB into RAM location IODEV Utility subroutines available to the user are listed in Table 3 1 Table 3 1 Utility Subroutine Jump Table sme mae Go to gt prompt point skip BUFFALO message FF85 HEXBIN Convert ASCII character in A register to 4 bit binary number Shift binary number into SHFTREG from the right SHFTREG is a 2 byte 4 hexadecimal digits buffer If A register is not hexadecimal location TMP1 is incremented and SHFTREG is unchanged FF88 BUFFAR Read 4 digit hexadecimal argument from input buffer to SHFTREG FF8B TERMAR Read 4 digit hexadecimal argument from terminal device to SHF
85. ve low bi directional control line used to initialize the MCU 18 XIRQ X INTERRUPT REQUEST An active low input line used to request asynchronous non maskable interrupts to the MCU 6 2 M68HC11EVB D M MOTOROLA SUPPORT INFORMATION Table 6 1 MCU I O Port Connector P1 Pin Assignments continued Signal Mnemonic Signal Name and Description IRQ INTERRUPT REQUEST An active low input line used to request asynchronous interrupts to the MCU PORT D bits 0 5 General purpose l O lines These lines can be Qe with m MCU Serial Communications Interface SCl and Serial Peripheral Interface SPl VDD 5 0 Vdc power PA7 PAO PORT A bits 7 0 General purpose lines PB7 PBO PORT B bits 7 0 General purpose output lines PORT E bits 0 7 General purpose input or A D channel input lines VOLTAGE REFERENCE LOW Input reference supply voltage low line for the MCU analog to digital A D converter Used to increase accuracy of the A D conversion VOLTAGE REFERENCE HIGH Input reference supply voltage high line Same purpose as pin 51 53 60 Not connected M68HC11EVB D 6 3 SUPPORT INFORMATION M MOTOROLA Table 6 2 Terminal I O Port Connector P2 Pin Assignments Pur rrr Mnemonic Signal Name and Description 5 CTS CLEAR TO SEND An output signal used to indicate ready to transfer data status This pin is connected to both DSR pin 6 and DCD pin 8 DSR DATA SET READY An
86. ypes a command line Command processing begins only after the command line has been terminated by depressing the keyboard carriage return CR key 4 5 COMMAND LINE FORMAT The command line format is as follows gt lt command gt lt parameters gt lt CR gt where gt EVB monitor prompt lt command gt Command mnemonic single letter for most commands parameters Expression or address CR ENTER keyboard key depressed to enter command NOTES 1 The command line format is defined using special characters which have the following syntactical meanings lt gt Enclose syntactical variable Enclose optional fields Enclose optional fields repeated These characters are not entered by the user but are for definition purposes only 2 Fields are separated by any number of space comma or tab characters 3 All input numbers are interpreted as hexadecimal 4 All input commands can be entered either upper or lower case lettering All input commands are converted automatically to upper case lettering except for downloading commands sent to the host computer or when operating in the transparent mode 5 A maximum of 35 characters may be entered on a command line After the 36th character is entered the monitor automatically terminates the command entry and the terminal CRT displays the message Too Long 6 Command line errors may be corrected by backspacing CTRL H or by aborting the command CTRL X

Download Pdf Manuals

Related Search

Related Contents

  Philips Flash audio player  

Copyright © All rights reserved. Failed to retrieve file