EMERALD-MM-8P
Contents
1. REG_DWORD 0x3 REG_DWORD 0x7 SharedInterrupts REG DWORD 0x1 SharedInterrupts REG DWORD 0x1 Serial6 Serial10 DosDevices REG_SZ DosDevices REG_SZ 10 COM6 ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD 0 1 Interrupt REG DWORD 0x7 Interrupt REG DWORD 0x7 InterruptStatus REG DWORD 0x202 InterruptStatus REG DWORD 0x202 PortAddress REG DWORD 0x138 PortAddress REG DWORD 0x118 REG_DWORD 0x8 REG_DWORD 0x4 SharedInterrupts REG DWORD 0x1 Sharedlnterrupts REG DWORD 0x1 Page 19 11 SPECIFICATIONS Serial Ports Number of serial ports Protocols Maximum baud rate Communications parameters Short circuit protection RS 232 mode Input impedance Input voltage swing Output voltage swing RS 422 RS 485 modes Differential input threshold Input impedance Input current Differential output voltage High low states differential output voltage symmetry Digital I O No of I O lines Input voltage Output voltage General I O header Dimensions Power supply Current consumption Operating temperature Operating humidity PC 104 bus 2005 2008 Diamond Systems Corp 8 EMM 8P XT RS 232 RS 422 RS 485 115kbps standard version 460 8kbps available via jumper selection 5 6 7 or 8 data bits Even odd or no parity All outputs protected against continuous short circuit min 30V max 5V min 7V typical2. una e e ieri 17 INSTALLING EMERALD MM 8P IN YOUR 5 8 2 110 18 SPECIFICATIONS eioh M S 20 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 2 E M E RA L D M M 8 P 8 Channel Software Configurable Protocol Serial Port PC 104 Modules 1 DESCRIPTION Emerald MM 8P is a PC 104 I O module with 8 serial ports with protocols that are software programmable addresses and interrupt levels are programmable for each port allowing maximum configuration flexibility For applications where fixed addresses are desirable four groups of preset addresses are provided that can be selected by jumper settings Two I O headers are provided with four serial ports on each header The board operates on 5V only eliminating the need for a 12V supply that is often required for serial port operation Emerald MM 8P is based on the 160654 quad serial port IC This device contains 4 identical sets of registers one for each port and is compatible with the standard PC serial port Each port contains a 16 byte FIFO Complete descriptions of these registers may be found in the Appendix Most users will not need this programming information as it is normally handled by the operating system s communications software 2 FEATURES e 8 serial ports with 16 byte FIFOs Software Configurable RS 232 RS 422 RS 485 Upto 115 2kbps in standard configuration up to 460 8k
3. 0 2V min 0 2V max 12 min 1 0 max Vin 12V 0 8mA max Vin 7V 2 0V min 500 0 2V max At Vcc 5 0VDC 8 in 8 out Low 0 3V min 0 8V max High 2 0V min 5 3V max Low 0 0V min 0 4V max loi 6MA max High 3 7V min 5 0V max loH 4mA max 2 40 position 2x20 025 square pin header on 1 centers Headers mate with standard ribbon cable IDC connectors 3 55 x 3 775 LxW PC 104 standard 5VDC 10 160mA typical all outputs unloaded 40 C to 85 C Industrial range 5 to 95 noncondensing 8 bit and 16 bit bus headers are installed and used 16 bit header is used for interrupt levels only Emerald MM 8P User Manual V1 10 Page 20
4. FOR PORT 4 ccsscccecssssececesececesseeecseaaececseceecessaeeecseaeeeeneeeeenens 10 VO REGISTER MAP C 11 REGISTER Porc 13 8 1 ADDRESS POINTER ENABLE REGISTER BASE ADDRESS 0 READ WRITE 13 8 2 ADDRESS IRQ PROTOCOL DATA REGISTER BASE ADDRESS 1 13 8 3 ADDRESS REGISTER READBACK BASE ADDRESS 1 14 8 4 DIGITAL I O DIRECTION REGISTER BASE ADDRESS 2 14 8 5 INTERRUPT STATUS REGISTER BASE ADDRESS 2 READ rennen enne 14 8 6 DIGITAL I O OUTPUT REGISTER BASE ADDRESS 3 14 8 7 DIGITAL INPUT REGISTER BASE ADDRESS 3 READ enne enne ener ennt 14 8 8 EEPROM COMMAND AND ADDRESS REGISTER BASE ADDRESS 4 15 8 9 EEPROM Busy STATUS BASE ADDRESS 4 15 8 10 EEPROM DATA REGISTER BASE ADDRESS 5 READ WRITE ii 15 8 11 CONFIGURATION REGISTER RELOAD COMMAND BASE ADDRESS 6 WRITE 15 EEPROM 62555 sooro ooo atos ansas sosis Pe ceri 16 9 1 EEPROM MAP AND DESCRIPTION 2 2241 222002000 00000000000000000000 500000 500000 5 16 9 2 HOW TO USE THE
5. IRQ numbers The last two locations 16 and 17 are used to store the port protocol for each port The memory map of the EEPROM is identical to the register map for the addresses and interrupts on Emerald MM 8P EEPROM Address Function 0 Port 0 Address 1 Port 1 Address 2 Port 2 Address 3 Port 3 Address 4 Port 4 Address 5 Port 5 Address 6 Port 6 Address 7 Port 7 Address 8 Port 0 IRQ No 9 Port 1 IRQ No 10 Port 2 IRQ No 11 Port 3 IRQ No 12 Port 4 IRQ No 13 Port 5 IRQ No 14 Port 6 IRQ No 15 Port 7 IRQ No 16 Ports 0 3 Protocol Configuration 17 Ports 4 7 Protocol Configuration The address values stored in EEPROM are the upper 7 bits of the 10 bit serial port address Each serial port uses 8 registers so the binary base address of each serial port always ends in 000 To determine the value to store in the EEPROM divide the desired base address by 8 Desired base address 120 Hex 01 0010 0000 288 Decimal EEPROM value 288 8 36 Decimal 24 Hex 010 0100 These are the 7 uppermost bits of the original base address This value would be written to the selected port s address location in the EEPROM to program that port for The IRQ numbers stored in EEPROM are the actual IRQ numbers without any changes Each port may be programmed for its own IRQ number or any number of ports may share an IRQ Not all IRQs are available in all computers You will need to test for availability and operability of the selected IRQ NOTE The s
6. REGEDT32 EXE and go to the following dialog box Key_Local_Machine System CurrentControlSet Service Serial Parameters 2 Adda new key for each serial port by selecting Edit Add Key The following parameters need to be specified for each serial port SerialN N serial port number 1 2 3 4 etc Parameter Type Value Comments DosDevices REG_SZ Name of port e g COM5 COME ForceFifoEnable REG_DWORD 0 1 for yes Interrupt REG_DWORD IRQ level in Hex format e g 0x5 for 5 or for 10 InterruptStatus REG_DWORD Address of interrupt status register in Hex e g 0x102 See page 8 for status register addresses PortAddress REG_DWORD Address or port in Hex e g 0x120 for Hex 120 PortIndex REG_DWORD Bit position in status register 0x1 for LSB through 0x8 for MSB Note this is NOT the weighted bit value See page 14 for details SharedInterrupts REG DWORD 0x1 for yes 0 0 for 3 Exit REGEDT32 EXE and restart NT See the example parameter values on the following page 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 18 Windows NT Registry Setup Example The following example is for 8 ports on an EMM 8P XT board installed on a CPU that already contains 2 serial ports called COM1 and COM2 Note that all 8 ports on the Emerald MM 8P board share the same interrupt status register but the bit position changes for each port The settings shown are the factory settings for the board All
7. 0 for read 2 Monitor Busy bit bit 7 in base 4 until it is 0 3 Read data from Base 5 EEPROM Reload Operation 1 Write 0x80 128 to Base 6 to initiate Reload operation 2 Monitor Busy bit bit 7 in base 4 until it is 0 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 17 10 INSTALLING EMERALD MM 8P IN YOUR SYSTEM Diamond Systems provides utility programs to configure the Emerald MM 8P board for use in your computer system For DOS and Windows 9x applications the program will configure the address and interrupt settings store them in the EEPROM on the board and allow you to store them in a file which can be used later to program additional boards with the same configuration For Windows NT applications the program will additionally configure the NT registry with the proper settings according to the configuration you select The configuration programs and instructions are in the zip file EMM8 zip that is included in the board s software diskette For DOS and Windows 9x applications complete instructions are in the file readme txt in the DOS 9x folder and the application program is called eepconf exe For Windows NT applications complete instructions are in the file EMM8 NT txt in the NT folder and the application is called Emm8Conf exe The instructions below may be used to manually set up Windows NT to run with the board However these instructions are not needed if Emm8Conf exe is used 1 Run
8. DIAMOND SYSTEMS CORPORATION EMERALD MM 8P 8 Channel Software Programmable Protocol Serial Port PC 104 Module User Manual V1 10 Copyright 2005 2008 DIAMOND SYSTEMS CORPORATION 1255 Terra Bella Avenue Mountain View CA 94043 Tel 650 810 2500 Fax 650 810 2525 techinfo diamondsystems com www diamondsystems com TABLE OF CONTENTS 10 11 DESCRIPTION basi sccsssstsetissiessassossdasosasesscdesscascnnstaaseosssedesoaaseassbesounsedasaasctosdaseussesseeeseuaseanstvasoosesecsssaseussos 3 BEA TURES 3 EMERALD MM 8P BOARD 1 2 rese senreneeeen ener sese snenesenecenenesinecenenesieneeeee 4 YO HEADERPINOUTS sr criceto peto Ca eU T cercarne sansessonscoussevncsasenecsveesessovassoascesecssous 5 HEADER PIN DEFINITIONS cssscssssosssscsssccssscssscssssssssccsssssssscssnessssscssessssscssssssssssseessoess 7 BOARD CONFIGURATION ccscssscscscscscscsscccscscscscscsssssesscssscsssesecsneessessscsseessesssessscsssssssssessesesens 8 6 1 PORT AND INTERRUPT REGISTER ADDRESS 8 6 2 RS 422 RS 485 CABLE ENDPOINT TERMINATION 9 enne 9 0 3 INTERRUPT SHARING aaa 9 6 4 HIGH BAUD RATE UART CLOCK SELECTION crei 9 6 5 POWER UPPORT BNABLE iere REL A LL na 10 6 6 PULL UP PULL DOWN RESISTORS
9. LE Enables chip selects for the 8 serial ports 1 enable 0 disable On power up or reset all ports are automatically configured with the EEPROM values If the PD jumper on jumper block J9 is not installed the ports are also automatically enabled If the PD jumper is installed the ports must be manually enabled by writing to bit 7 When manually programming the address and IRQ registers this bit must be set after programming is complete in order to enable the serial ports X Not used A3 0 Address of internal configuration register 0 7 Address registers for ports 0 7 respectively 8 15 Interrupt level register for ports 0 7 respectively 8 2 Address IRQ Protocol Data Register Base Address 1 Write This register is used to write data to the register selected with the address enable register described above The data must be written to this register after the address is selected Note that writing to the board s serial port address and IRQ registers does not cause a write through to the corresponding EEPROM registers The user must explicitly write the data to the EEPROM to store these settings for future use when the board is reset or the power is cycled X Not used D6 0 Register data For address registers D6 0 contains the upper 7 bits of the 10 bit base address of the serial port Valid port base addresses are 100 Hex to 3F8 Hex For interrupt level registers Only D3 0 are used Valid values
10. These registers are accessed through the address pointer register at Base 0 The register map is shown below Register No Function 0 Port 0 Address 1 Port 1 Address 2 Port 2 Address 3 Port 3 Address 4 Port 4 Address 5 Port 5 Address 6 Port 6 Address 7 Port 7 Address 8 Port 0 IRQ No 9 Port 1 IRQ No 10 Port 2 IRQ No 11 Port 3 IRQ No 12 Port 4 IRQ No 13 Port 5 IRQ No 14 Port 6 IRQ No 15 Port 7 IRQ No 16 Ports 0 3 Protocol Configuration 17 Ports 4 7 Protocol Configuration To write data to a register first write the number of that register 0 17 to the board s address pointer enable register at Base address 0 Then write the data to the board s data register at Base address 1 To program an address for a port write the upper 7 bits of the 10 bit I O address into bits 6 0 of the address register for that port The value written to the address register is therefore the desired I O address divided by 8 All I O addresses should be on 8 byte boundaries between 100 Hex and 3F8 Hex Addresses below 100 Hex are reserved for CPU functions A value of 00 Hex for a port address will disable that port To select an interrupt level for a port write the desired interrupt level to that port s interrupt level register Valid interrupt levels are 2 3 4 5 6 7 10 11 12 and 15 Writing any other value to the interrupt level register including 00 Hex will cause that port not to generate interrupts Bit 7 of Base add
11. are 2 3 4 5 6 7 10 11 12 and 15 Any other value will prevent interrupts from operating on the selected port I O Address example Desired I O address 140 Hex 01 0100 0000 Only the upper 7 bits are needed The three lowest bits are always 0 resulting in all addresses being on 8 byte boundaries Necessary bits 0 10 1000 28 Hex An easy way to generate these bits is to divide the I O address by 8 or shift right 3 places 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 13 8 3 Address Register Readback Base Address 1 Read This register provides a means to read back the current address settings for Ports 1 8 as a diagnostic tool to verify that the board is present and responding Using this technique all 8 address registers can be read back but the IRQ registers cannot be read back All 18 register values be read back from the EEPROM see page 15 for details 8 4 Digital I O Direction Register Base Address 2 Write This register determines the direction of each of the 8 digital I O lines The direction of each bit can be programmed individually This register is cleared to 0 on reset or power up all bits in input mode se 7 e TTT e e we DAT pne ons oma oma one ORT ORO Dir7 0 0 1 output 8 5 Interrupt Status Register Base Address 2 Read The interrupt status register indicates the status of each port s interrupt request line It opera
12. bps available Software selectable I O addresses and interrupt levels EEPROM storage of configuration data for instant availability on power up e l Olines are short circuit protected 8 programamble digital I O lines 1 per port Dual 40 pin I O headers 4 ports per header 4 5V only operation Extended temperature 40 C to 85 C operation e PC 104 form factor 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 3 3 EMERALD MM 8P BOARD DRAWING 1 J1 J2 J3 J4 J5 J8 J9 J10 J11 PC 104 bus 8 bit connector PC 104 bus 16 bit connector I O header for ports 1 4 2x20 pins 4 DIO I O header for ports 5 8 2x20 pins 4 DIO Termination jumper blocks two ports per block Board address and interrupt pull down resistor configuration JTAG Programming Connector Bias Resistor Enable Jumper Block for Port 4 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 4 4 I O HEADER PINOUTS Emerald MM 8P provides two identical 40 pin headers labeled J3 and J4 for the serial ports Four ports are contained on each header Pin numbers are marked on the board to assist with connector orientation Depending on the model you have each port may be fixed in a single protocol or configurable for different protocols The template connector pinouts below are provided to show the pinout for each port in each configuration The actual pinout of each conn
13. ector will depend on the model you have and the configuration you have set for each port RS 232 Configuration 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 5 RS 485 Configuration Port 1 NC Port 5 NC NO o TXD RXD 1 TXD RXD 5 TXD RXD 5 GND GND NC NC NC NC dano OND oaa DIOE ts Port 2 NC Port 6 NC NC TXD RXD 2 TXD RXD 6 TXD RXD 6 GND GND NC NC NC NC a OND ANDA Port 3 NC Port 7 NC NC TXD RXD 3 TXD RXD 7 TXD RXD 7 GND GND NC NC NC NC lita AND DIOG fL Port 4 NC Port 8 NC NC TXD RXD 4 TXD RXD 8 TXD RXD 8 GND GND NC NC NC NC GND GND DIOH 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 6 5 I O HEADER PIN DEFINITIONS Signal Name Definition Direction RS 232 DCD Data Carrier Detect Input DSR Data Set Ready Input RXD Receive Data Input RTS Request To Send Output TXD Transmit Data Output CTS Clear To Send Input DTR Data Terminal Ready Output RI Ring Indicator Input RS 422 TXD TXD Differential Transmit Data Output RXD RXD Differential Receive Data Input RS 485 TXD RXD Differential Transmit Receive Bi directional TXD RXD Differential Transmit Receive Bi directional Common to all protocols DIO A H Digital I O lines Programmable GND Ground NC Not Connected 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 7 6 BOARD CONFIGURATION 6 Refe
14. erial port base addresses must be distinct from each other and must also be distinct from the board s base address If any serial port s address is programmed to overlap with the board s base address that port will not be accessible and the address will have to be reconfigured 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 16 9 2 How to Use the EEPROM There are three available EEPROM operations write data read data and reload data The write and read operations store data in the EEPROM but have no effect on the board s configuration settings The reload operation updates the board s configuration settings to match the values stored in the EEPROM Note that writing to the board s serial port address and IRQ registers does not cause a write through to the corresponding EEPROM registers The user must explicitly write the data to the EEPROM to store these settings for future use when the board is reset or the power is cycled The EEPROM contains 256 bytes However only locations 0 63 may be accessed Only EEPROM addresses 0 17 are used to store data for the configuration of Emerald MM 8P The remaining locations are available for customer application use EPROM Write Operation 1 Write data to Base 5 2 Write 6 bit address including Write bit bit 7 1 to Base 4 3 Monitor Busy bit bit 7 in base 4 until it is 0 EEPROM Read Operation 1 Write 6 bit address to Base 4 Bit 7
15. essive read operations This is normal behavior for a floating input pin sane 7 e T5 T5 L5 L2 T5 fo we D07 pos nos noz BOO DIO 7 0 Logic state of I O line 7 0 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 14 8 8 EEPROM Command and Address Register Base Address 4 Write This register is used to initiate an EEPROM read or write operation First the data is written to Base 5 then the address and read write bit are written to this register to initiate the operation After writing the operation has started the application program should monitor the Busy bit by reading this address to know when the operation is complete R W Read Write bit 1 write operation 0 read operation EEA6 0 EEPROM address The EEPROM has 256 bytes only the lowest 64 are accessible Only the lowest 16 contain configuration information for the board The other registers are available for customer application 8 9 EEPROM Busy Status Base Address 4 Read The Busy bit indicates whether the EEPROM is busy with a read write or reload operation The application program must monitor this bit after each read write or reload operation before proceeding to another one If a new EEPROM operation is commenced without waiting for the previous one to finish the new operation will be ignored Bit No Name BUSY EEPROM Busy status 1 busy 0 idle X Not used 8 10 EEPROM Da
16. hm resistors can be jumper configured to drive the circuit to an inactive state when the pins are left unconnected using jumper block J11 as follows The default is with no jumpers installed For RS 422 install vertical jumpers in all four positions T T R R to enable active pull up down on the TX and RX line pairs For RS 485 install vertical jumpers in the two positions T and T to enable active pull up down on the combination TX RX line pair Feature J11 Jumper Settings vertical jumpers RS 422 Active Pull up down Jumper on T pins Jumper on T pins Jumper on R pins Jumper on R pins RS 485 Active Pull up down Jumper on T pins Jumper on T pins No jumper on R pins No jumper on R pins No Active Pull up down No jumpers on any pins default 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 10 7 REGISTER MAP Emerald MM 8P Register Map Base Address Write Read 0 Address pointer enable register Address pointer enable register 1 Data for address IRQ no Readback of address registers 2 Digital I O direction register Interrupt status register 3 Digital output register Digital input readback register 4 EEPROM read write address EEPROM busy status 5 EEPROM data write operation EEPROM data read operation 6 Reload command N A 7 N A N A Emerald MM 8P contains 18 additional registers for selecting the address and and interrupt level for each port
17. ly one such resistor should be used on each active interrupt line For each interrupt level availabe on Emerald MM 8P there is a position on jumper block J9 with that interrupt level number for enabling the pulldown resistor Install a jumper in this position to connect the resistor and remove the jumper to disconnect the resistor 6 4 High Baud Rate UART Clock Selection 2005 2008 Diamond Systems Corp For those applications that require high baud rates jumper pins CK are provided on jumper block J9 to select a high baud rate Placing a vertical jumper on the CK pin pair causes the baud rate to become 4x the programmed rate enabling a 460 8kbps top baud rate With no jumper installed on the CK pins default the baud rate is the programmed rate with a maximum rate of 115kbps Emerald MM 8P User Manual V1 10 Page 9 6 5 Power Up Port Enable Disable The serial ports on EMM 8P XT can be configured to be enabled or disabled on power up To enable the ports on power up remove the jumper from location PD on jumper block J9 default setting To disable the ports on power up install the jumper vertically on the PD pin pair of jumper block J9 If the PD jumper is installed the ports will still be automatically configured for the programmed addresses and IRQ settings but they will need to be enabled by setting the ENABLE bit see Sections 7 and 8 6 6 Pull up pull down Resistors for Port 4 In RS 422 RS 485 mode on port 4 only 4 7K o
18. ports are set to share the same interrupt number Configuration selections 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Port1 Port2 Port3 Port4 Port5 Port6 Port7 Port8 Address 0x100 0x108 0x110 0x118 0x120 0x128 0x130 0x138 IRQ No 7 7 7 7 7 7 7 7 Board base address 0x200 Interrupt status register 0x202 Serial3 Serial7 DosDevices REG_SZ DosDevices REG_SZ COM3 COM7 ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD 0 1 Interrupt REG_DWORD 0x7 Interrupt REG_DWORD 0x7 InterruptStatus REG DWORD 0x202 InterruptStatus REG DWORD 0x202 PortAddress REG DWORD 0x100 PortAddress REG DWORD 0x120 Portlndex REG_DWORD 0 1 Portlndex REG_DWORD 0x5 SharedInterrupts REG DWORD 0x1 SharedInterrupts REG DWORD 0x1 Serial4 Serial8 DosDevices REG SZ DosDevices REG SZ COMA COM8 ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD 0 1 Interrupt REG_DWORD 0x7 Interrupt REG_DWORD 0x7 InterruptStatus REG DWORD 0x202 InterruptStatus REG DWORD 0x202 PortAddress REG DWORD 0x108 PortAddress REG DWORD 0x128 REG_DWORD 0x2 REG_DWORD 0x6 SharedInterrupts DWORD 0x1 SharedInterrupts DWORD 0x1 Serial5 Serial9 DosDevices REG_SZ DosDevices REG_SZ COM5 COMI ForceFifoEnable REG DWORD 0 1 ForceFifoEnable REG DWORD 0 1 Interrupt REG_DWORD 0x7 Interrupt REG_DWORD 0x7 InterruptStatus REG DWORD 0x202 InterruptStatus REG DWORD 0x202 PortAddress REG DWORD 0x110 PortAddress REG DWORD 0x130
19. r to the Drawing of Emerald MM 8P on page 4 for locations of the configuration items mentioned here Port and Interrupt Register Address Selection Each peripheral board in the computer system must have a unique I O address or block of addresses Emerald MM actually uses nine I O address blocks one for each of the eight serial ports and one for the board s configuration registers Each port s address block consists of 8 consecutive addresses while the configuration and interrupt status register block occupies four addresses Jumper block J9 in the lower left corner of the board is used for configuration of the board s base address The serial port I O addresses are set in software once this address is known To help with the translation between jumper settings and addresses remember that each jumper installed corresponds to a 0 and each jumper out corresponds to a 1 The 4 jumpersD CBA correspond to address bits 9 8 7 6 and address bits 5 0 are forced to 0 to determine the base address Board Configuration Register Addresses Base Address DIO Direction Register Addr Pointer Data Interrupt Status D C B A Register Register Register DIO Register In In In In Invalid setting In In In Out Invalid setting In In Out In Invalid setting In In Out Out Invalid setting In Out In In 100 101 102 103 In Out In Out 140 141 142 143 In Out In 180 181 182 183 In Out Out 100 1 1 102 163 In In In 200 201 202 203 Out In In O
20. ress 0 is the port enable bit and must be set after manual loading of port addresses and interrupts in order to enable serial port operation On power up or reset all ports are automatically configured with the EEPROM values If the PD jumper on jumper block J9 is not installed the ports are also automatically enabled If the PD jumper is installed the ports must be manually enabled by writing to bit 7 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 11 To configure the serial protocol for a port the pair of bits assigned to that port must be configured as shown below REGISTER 16 Name Port 3 Port 3 Port 2 Port 2 Port 1 Port 1 Port 0 Port 0 CFGI CFGO CFGI CFGO CFGI CFGO CFGI CFGO REGISTER 17 Name Port 7 Port 7 Port 6 Port 6 Port 5 Port 5 Port 4 Port 4 CFG1 CFGO CFG1 CFGO CFG1 CFGO CFG1 CFGO CFGO PROTOCOL 0 0 RS232 RS422 RS485 with Echo RS485 without Echo o o 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 12 8 I O REGISTER DETAIL 8 1 Address Pointer Enable Register Base Address 0 Read Write This register selects the address or IRQ register to be programmed and also enables the serial ports The value written to this register can be read back for diagnostic purposes After writing the address to this register the appropriate data is written to the data register at Base address 1 See 8 2 below ENAB
21. t 1 Port 3 Port 5 Port 7 Terminal Resistor Jumper on 1T pins Jumper on 1R pins Jumper on 3T pins Jumper on 3R pins Jumper on 5T pins Jumper on 5R pins Jumper on 7T pins Jumper on 7R pins RS 422 1200 Terminal Resistor Port 2 Jumper on 2T pins Jumper on 2R pins Port 4 Jumper on 4T pins Jumper on 4R pins Port 6 Jumper on 6T pins Jumper on 6R pins Port 8 Jumper on 8T pins Jumper on 8R pins RS 485 1200 Terminal Resistor Port 1 Jumper on 1T pins No jumper on 1R pins Port 3 Jumper on 3T pins No jumper on 3R pins Port 5 Jumper on 5T pins No jumper on 5R pins Port 7 Jumper on 7T pins No jumper on 7R pins RS 485 1200 Terminal Resistor Port 2 Jumper on 2T pins No jumper on 2R pins Port 4 Jumper on 4T pins No jumper on 4R pins Port 6 Jumper on 6T pins No jumper on 6R pins Port 8 Jumper on 8T pins No jumper on 8R pins 6 3 Interrupt Sharing On the PC 104 bus interrupt levels may be shared by multiple devices For this reason the interrupt is driven to a logic high level by the device requesting service and when the device is serviced it tristates the line rather than driving it low This technique avoids contention by two devices trying to drive the line with opposing logic levels In order to guarantee valid logic levels on the line when the device is not requesting service each active interrupt level requires a 1KQ pulldown resistor On
22. ta Register Base Address 5 Read Write When writing to the EEPROM the data is first written to this register before the address and write bit are written to Base 4 When reading from the EEPROM the address to read from is first written to Base 4 Then the program must monitor the BUSY bit in Base 4 When it is 0 the program may read the EEPROM data from this register EED7 0 EEPROM data 8 11 Configuration Register Reload Command Base Address 6 Write This register is used to cause a reload of the contents of the EEPROM into the board s configuration registers This can be done at any time for example to recall known good settings in case the user loads invalid data into the registers RELOAD Setto 1 to force a reload of the 8 address settings and 8 interrupt level settings from the EEPROM into the board The BUSY bit Base 4 bit 7 will go high and stay high until the reload is complete X Not used 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 15 9 EEPROM OPERATION 9 1 EEPROM Map and Description Emerald MM 8P V1 has an EEPROM for storage of the address and interrupt level settings for each serial port The EEPROM has 256 bytes total of which the lowest 64 are addressible Only the lowest 18 registers in the EEPROM are used The first 8 locations 0 7 are used to store the base address values for the 8 serial ports The second 8 locations 8 15 are for the 8 interrupt levels
23. tes regardless of whether interrupt sharing is enabled see below If two or more ports are sharing the same interrupt level the status register will still indicate the correct status of each port s interrupt request line If different ports are sharing different interrupt levels the status register will still operate properly we 7 TT TID LL fo wwe wre wrs wre wre wre wrr mro Definitions INT 7 0 Status of interrupt request for each port 0 no interrupt request active 1 interrupt request active 8 6 Digital I O Output Register Base Address 3 Write This register programs the digital output lines on the I O headers Any line set to output mode using the configuration register at base 2 will be set to the value specified in this register Any I O line in input mode will not be affected The digital output register is cleared to 0 on power up or system reset Ts L5 e To Name Dou Dort Doura Dowo Dout 7 0 Set digital output line to value specified 8 7 Digital Input Register Base Address 3 Read This register returns the state of the 8 digital I O lines on the I O headers Any line in output mode will be read back Any line in input mode will be read as the state of the pin on the I O header Input pins that are not driven externally will float They will have an unpredictable readback value and the value may change on succ
24. ut 240 241 242 243 Out In Out In 280 281 282 283 Out In Out Out 2C0 2C1 2C2 2C3 Out In In 300 301 302 303 Out Out In Out 340 341 342 343 Out Out In 380 381 382 383 Out Out 3C0 3C1 3C2 3C3 2005 2008 Diamond Systems Corp Emerald MM 8P User Manual V1 10 Page 8 6 2 5 422 RS 485 Cable Endpoint Termination In RS 422 or RS 485 networks termination resistors are normally installed at the endpoints of the cables to minimize reflections on the lines Emerald MM 8P provides 1200 resistors for this purpose To enable resistor termination for a port install jumpers in the locations T and R of that port s corresponding configuration jumper block J5 J8 Termination is only needed and should only be used at the cable endpoints Enabling these termination resistors at each end of the cable results in an effective impedance of 600 Installing termination resistors at additional points in the network may cause overloading and failure of the line drivers due to the lower impedance caused by multiple resistors in parallel Jumper Blocks J5 J8 Using jumper blocks J5 J8 1200 termination resistors can be added individually for each of the eight serial ports as follows The default configuration is with no jumpers installed Termination J5 Jumper Settings J6 Jumper Settings J7 Jumper Settings J8 Jumper Settings Feature horizontal jumpers horizontal jumpers horizontal jumpers horizontal jumpers RS 422 1200 Por
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