iSBX 311 Analog Input Multimodule Board Hardware Reference
Contents
1. 1 1 2 1 Board Dimensions Inches ess 2 2 2 2 Mounting Clearances 2 3 2 3 Voltage Gain Resistor Location 2 4 2 4 Single Ended Input Configuration 2 8 2 5 Differential Input Configuration 2 8 2 6 Mounting Technique 2 9 FIGURE TITLE PAGE 3 1 Channel Selection Byte Format 3 2 3 2 Data Form t pesce va aae RESET EE KS 3 2 4 1 iSBX 311 Board Functional Block Diagrami is V Ma ne teu 4 3 5 1 iSBX 311 Analog Input Multimodule Board Parts Location Diagram 5 5 5 2 iSBX 311 Analog Input Multimodule Board Schematic Diagram 5 7 CHAPTER 1 GENERAL INFORMATION 1 1 INTRODUCTION The iSBX 311 Analog Input Multimodule Board is a member of Intel s growing family of expansion boards designed to allow quick easy and inexpen sive expansion for the Intel single board computer product line The iSBX 311 Analog Input Multi module Board hereafter referred to as the Multi module board provides the ability to add analog input functions to any host iSBC board that con tains an iSBX bus connector Compatibility can also be maintained with the iCS 910 Analog Signal Con ditioning Termination Panel since the Multi module board contains a 50 pin edge connector with a pin assignment compatible with that of the iSBC 711 Analog Input Board This manual contains the information required to use the Multimodule2. 1 3 CHAPTER 2 PREPARATION FOR USE 2 1 INTRODUCTION This chapter of the text provides information on preparing and installing the iSBX 311 Analog Input Multimodule Board The instructions include un packing and inspection instructions installation considerations such as physical power cooling and mounting requirements jumper configuration de characteristics connector assignments jumper configuration and installation procedures 2 2 UNPACKING AND INSPECTION Inspect the shipping carton immediately upon receipt for evidence of mishandling during transit If the shipping carton is severely damaged or waterstained request that the carrier s agent be present when the carton is opened If the carrier s agent is not present when the carton is opened and the contents of the carton are damaged keep the carton and the packing material for the agent s inspection For repair to a product damaged in shipment contact the Intel Technical Support Center to obtain a Return Authorization Number and further instruc tions A purchase order will be required to complete the repair A copy of the purchase order should be submitted to the carrier with your claim It is suggested that the salvageable shipping cartons and packing material be saved for future use in the event that the product must be shipped 2 3 INSTALLATION CONSIDERATIONS Installation considerations such as power cooling mounting and physical siz
3. LF354 Figure 2 3 Voltage Gain Resistor Location 2 4 iSBX 311 Table 2 3 Gain Resistor Values GAN Ra VALUE Rb VALUE 2K 1K 500 ohms 500 ohms 100 ohms 50 ohms 50 ohms Notes suggested maximum gain configuration choose Ra so that Rb does not exceed 50 ohms To choose the proper resistor values Ra and Rb for your application first decide how much gain is required for the application and then calculate the resistor values as follows Vout _ Ra Vu 7 Bb Voltage Gain Consider these examples If a voltage gain of 2 is required then the resistors Ra and Rb must be chosen such that Ra Rb For a voltage gain of 10 Ra and Rb must be chosen such that Ra 9Rb Each case however requires that the total resistance Ra Rb can be approximately 2000 ohms so that the amplifier can supply the required current output Preparation for Use For higher gain applications Rb should be 200 ohms or less to minimize noise pickup Some con figuration examples are listed in table 2 3 NOTE When selecting an Rb resistor value bear in mind that the smallest possible value of Rb will provide the best possible noise im munity When installing resistors Ra and Rb and capacitor Cb ensure that the U3 and U4 chip sockets and surrounding traces are not contaminated with sol der Failure to do so could result in damage to the board The Multimodule board includes a mounting posi ti
4. R1 R2 R3 Resistor 20K W 16 turn 3262X 203 RP2 Resistor Pack 10K 10 pin SIP 9R 4310R 101 103 RP1 Resistor Pack 1K 6 pin SIP 3R 4306R 102 102 C1 Capacitor cer 0 01uF 50V 80 20 OBD C8 Capacitor cer 0 001uF 50V 10 OBD C17 Capacitor cer 1800pF 50V 1096 OBD C18 Capacitor cer 33pF 50V 596 OBD C22 Capacitor cer 0 1uF 50V 80 20 OBD C25 Capacitor dg 0 01uF 50V 80 20 OBD C5 C7 C12 C13 C16 C19 C20 Capacitor dg O 1uF 50V 80 20 OBD C10 C11 C14 C15 Capacitor dg 220pF 50V 10 OBD C2 C3 C4 C6 C9 Capacitor cer 1uF 50V 80 20 OBD C21 Capacitor tant 33uF 10V 20 OBD C23 C24 Capacitor tant 15uF 20V 20 OBD CR1 CR2 Diode HP2811 OBD VR1 Diode zener 1N4567 OBD Q1 Transistor PNP 2N4403 OBD Shorting Plugs 530153 2 Socket SIP 12 pin 7195 295 5 Socket SIP 8 pin 7195 295 5 Socket SIP 4 pin 7195 295 5 Connector 36 pin 000292 0001 Stake pins brass 87623 1 OO BB D PO NN 5 3 Service Information Table 5 5 Manufacturer Codes Mtr Code Manufacturer Address Harrisburg PA Sunnyvale CA AMP Incorporated Advanced Microdevices Analog Devices Norwood MA Bourns Inc Riverside CA EMC Technology Inc Cherry Hill NJ Hewlett Packard Palo Alto CA Intel Corporation Motorola Santa Clara CA Franklin Park IL Texas Instruments Dallas TX Viking Connectors In
5. SIGNATURE Tor amp 3065 BOWERS AVE 1 DIMENSIONS ARE IN IN E 7 74m CALIF 95051 2 BREAK ALL SHARP pi Lem BY Si Varo 58 1 een Hed AL fo PRINTED WIRING ASSEMBLY aro C AA eg 5 STAKE PINS ARE PREFIXED WITH VE QUANTITY PER DASH NO PARTS LIST A ANALOG INPUT MULTIMODULE SURFACE FINISH J Figure 5 1 iSBX 311 Analog Input Multimodule Board Parts Location Diagram 5 5 5 6 iSBX 311 Service Information 7 6 5 4 3 pe ego TE THIS DRAWING CONTAINS INFORMATION EN OF INTEL CORPORATION TN RAIN CW E ou Poe em 12V e b E B Eco 40 2067 PS Ime vs lan c R2 NA i COK Ge Lea Y W L AV D 114 2V vi B 2 5V Cu JI 12 110pt Jl iW 10 b di 20 HEI Ji 28 see MPXI A 2 H BUSY MPXA d ER MPXB C 2504CN mPxc D 2M il MaB D DID DS Mexe E EN N DB Ji 6 IN D D7 Ji 10 Sin U5 R Do 91 14 GI iN 3 HI 3 5067A 5 D5 91 18 Tina D4 VI 22 Zug D3 JI 26 WING D2 J1 30 0 iN Wl pi J1 24 9 xI Do START E CLOCK gt gt gt E 6 3V Siu mee 3 31 3 5 7 9 M 13 15 11 19 R3 GAIN 21 23 25 21 24 31 33 20K VC Plea 12V OAV PI Z WVV Pl 3 B GND P1 17 PI 3S Se Pi 4 T P1 18 CSILLA Cel P PI 3b A 22 zou E GE Ger ae 31 48 POWER GROUND AND SPARES TABLE Y 3 49 DEVICE REF POWER PINS js EM EE e e Y Lo E Ee ei s evis 13 22 14 31 50 2 CAPACITOR VALUES ARE IN MICRDFARADS 50V 8D7 Z0
6. or XE XO through XE Note Refer to the Hardware Reference Manual for your host iSBC microcomputer to determine the upper digit X of the Transfer converted data from Multi module board and resets the interrupt request line Transfer converted data and status from Multimodule board WRITE next channel address to Multi module board and initiate conversion Programming Information bit position Figure 3 1 Channel Selection Byte Format 3 4 DATA FORMAT A READ command is issued to the multimodule board to initiate a READ operation in which converted data is sampled by the host iSBC micro computer The digital data created within the Multimodule board is the result of operation of the SAR the DAC and the comparator to transform the analog input data into 12 bits of digital data which are left justified through two three state multi plexers to form two 8 bit bytes of digital data The format of the digital data bytes created by the Multimodule board is shown in figure 3 2 Bits DO through D3 of the low byte interface to bidirectional bus lines MD4 through MD7 respectively The low byte includes one unused bit bit 3 and the status bits EOC BUSY and START on MDO MD1 and MD2 respectively The high byte includes data bits D4 through D11 which are transferred on bidirectional bus lines MDO through MD7 respec tively iSBX 311 bit position 7 6 5 4 3 LOW BYTE os START BUSY EOC onere r
7. refer to table 5 3 c Call t he ADCRNG subroutine and adjust the R3 resistor until the readings on the monitor alternate equally between FFEH and FFFH as listed in table 5 3 5 10 REPLACEABLE PARTS Table 5 4 provides a list of replaceable parts for the Multimodule board Table 5 5 identifies and locates the manufacturers specified in the MFR CODE column of table 5 4 Intel parts that are available on the open market are listed in the MFR CODE column as COML Every effort should be made to procure these parts from a local commercial distributor iSBX 311 Service Information Table 5 4 Replaceable Parts Reference Designator Description Mfr Part No KEJET IC Monostable Multivibrator 74121 Bo IC Quad D type Flip Flop 74175 U12 U13 IC Quad 2 to 1 Multiplexer 74LS258A U14 IC Quad 2 input OR 74LS32 U8 IC Dual 4 bit Counter 74LS390 U5 U6 IC 8 to 1 Analog Multiplexer HI 3 508 A 5 U3 U4 IC Dual Op Amplifier LF353BN U7 IC Sample and Hold Register LF398N U2 IC Successive Approx Register AM2504CN U1 IC Digital To Analog Converter AD DAC 80Z CBI U10 IC Comparator LM311N Saa uy ND ON aap a R4 Resistor 1 1K 4AW 5 OBD R7 Resistor 39 2K W 1 OBD R12 Resistor 2 5323K 1 20W 0 02 10PPM OBD R13 Resistor 3 9K W 5 OBD R14 Resistor 681K ZW 1 OBD R15 Resistor 150 ohm W 5 OBD R5 R6 R10 Resistor 196K 4W 1 OBD R8 R9 R11 Resistor 2 5K 1 20W 0 02 10PPM OBD
8. HIGH BYTE command also clears the interrupt request line during initialization Principles of Operation iSBX 311 BUFFER AMP p ANALOG CHANNEL INPUT ANALOG INPUT MULTIPLEXER U6 IOWRT LOW BYTE MCS0 DIFFERENTIAL MD7 AMP ur MDO SECTOR ALU SAMPLE MUERE DECODE MD uti ADJUST REGISTER U13 MD5 MDZ U3 U7 e MD3 SEE E8 BUFFER E14 E15 AMP MD3 ANALOG wage Lo Ga SS moer oureur 102 ALOG CHANNEL INPUT MULTIPLEXER ES Meow SAMPLE BUFFER BNALOOCH y US START LOW BYTE U12 MD1 CLOCK STAT E13 E10 GUARANTEE GC pU a SIGNAL GROUND i BOARD START GROUND MCLK CLOCK DIVIDER 12 BITS INTERRUPT INTRO REQUEST U8 RESET Figure 4 1 iSBX 311 Board Functional Block Diagram Single Ended Unipolar Operation 4 5 4 6 CHAPTER 5 SERVICE INFORMATION 5 1 INTRODUCTION This chapter provides a list of replaceable parts service diagrams adjustment procedures and service and repair assistance instructions for the iSBX 311 Analog Input Multimodule Board 5 2 SERVICE AND REPAIR ASSISTANCE United States Customers can obtain service and repair assistance by contacting the Intel Product Service Hotline in Phoenix Arizona Customers outside the United States should contact their sales source Intel Sales Offices or Authorized Distrib utor for service information and repair assistance Before calling the Product Service Ho
9. IN or OUT instruction in the host iSBC micro computer to one of the legal port addresses for the Multimodule board Since some host iSBC micro computers will accept up to three Multimodule boards the upper address byte for each iSBX bus connector will vary as table 3 1 shows The port addresses vary according to whether an 8 bit board or a 16 bit board is used as the host iSBC microcom puter board 3 3 COMMAND FORMAT The Multimodule board is capable of responding to 2 types of commands READ commands and WRITE commands The READ command causes digital data high byte low byte or status to be transferred to the host iSBC microcomputer and the WRITE command transfers the channel address to the Multimodule board to select which channel will be converted Each of the commands is issued by the host iSBC microcomputer via either an IN or an OUT instruction directed to one of the legal port addresses The WRITE command must select the channel on the Multimodule board which is to be converted this consists of loading the channel selection byte into the A register before the OUT instruction is directed to one of the legal WRITE port addresses for the Multimodule board see table 3 1 The format of the channel selection byte is shown in figure 3 1 The channel selection byte bits CO C1 C2 and C3 is decoded by the Multimodule board to select one of the 16 for single ended operation or one of 8 for differential operation a
10. Table 5 1 Power Supply Voltage Requirements Across C23 Across C24 Across C21 Note Refer to figure 5 1 for capacitor locations 5 6 A TO D CONVERTER ADC CIRCU ITRY CALIBRATION PROCEDURE The cali bration procedure for the A to D Converter ADC circuits consists of a sequence of three steps which must be performed in the following order 1 ampli fier offset adjustment 2 ADC offset adjustment and 3 ADC range adjustment These adjustments are explained in the following paragraphs How ever be aware that the procedures outlined in the text assume that the calibration programs are run on a microcomputer system that includes a monitor screen and that contains a host microcomputer board within the microcomputer system and further assumes that an ADC offset ADCOFF subroutine and an ADC range ADCRNG subroutine are in the resident program Appendix A of this manual includes an example of typical programs to use when adjusting the ADC range and offset NOTE The calibration procedures are call for adjusting the channel 0 input Once channel 0 is adjusted properly it may be safely assumed that the remaining channels are aajusted properly 5 7 AMPLIFIER OFFSET ADJUST PRO CEDURE Adjust the amplifier offset as follows a Short input channel 0 by connecting J2 pin 4 to J2 pin 3 if in differential mode also short J2 pin 6 to J2 pin 4 b Set the DVM to the most sensitive de voltage scale Then connect t
11. board as follows a With a plastic screw 1 4 by 6 32 secure the plastic 1 2 by 6 32 spacer to the host iSBC board b Locate pin 1 of the iSBX bus connector P1 on the Multimodule board and align it with pin 1 of the iSBX bus connector on the host iSBC microcomputer c Align the mounting hole on the Multimodule board with the mounting spacer installed onto the host iSBC board in the first step d Gently press the two boards together until the connector seats e Secure the Multimodule board to the top of the spacer with another plastic 1 4 by 6 32 screw NOTE The location of an installed Multimodule board and the iSBX bus connector number on the host iSBC microcomputer may vary according to the type of host iSBC micro computer that is used iSBX 311 Not Used Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Not Used Not Used Not Used Not Used Not Used Not Used Analog Return 12v Table 2 5 Connector J1 Pin Assignment MON SINGLE ENDED DIFFERENTIAL ww SINGLE ENDED DIFFERENTIAL Not Used Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Analog Return Anal
12. lbmesoscn oz ie Ta IT 3 SYMBOL V DENOTES ANALOG COMMON KEE oy f 7 4 4 SMBOLT DENOTES DIGITAL COMMON LF359N u3 uve _ 8 4 B COMMON JUNCTION POINT FOR ANALOG AND H3ss08A5 US5 U6 m 1313 TE DESIT mu RU 6 RESISTOR PACKS ARE 2 1 2 W miei dus 7 Juaj b J a z 2 D j EE ME ea A PL EE e Ime QUES re E RE our Sra casa A USERS OPTION ZEZ AIE 8 Piet ED TEL in 145032 uia 7 f FS E S ee T Ee A SCHEMATIC Pimsunf vio sata er Ac EE ANALOG INCU MULTIMODULE Se A PRE A A eee aes RS ls nl sax 31 se eee ee ee KE ee DEE ENEE ele vd Gaeo ae a SE NN SENE Re Four ere E FE DER A RSS DENT EINE EN EE E 9200022 8 7 6 5 3 2 4 Figure 5 2 iSBX 311 Analog Input Multimodule Board Schematic Diagram Sheet 1 of 2 5 7 5 8 NOT SCLOSED WITH OUT THE PRIOR WRITTEN CONSENT OF INTEL CORPORATION MCLK PI 6 RESET PI 5 7ALS32 IOWRT PI I3 zT Mi 74532 MAC PI II IORD PI BUSY H DA os s Ge D7 P poe EEN EE Abe NS Be Se E ene PE SR San msesek DIO L T 3Y P Goal EE D ee A MU whem l a ul iSBX 311 Service Information Pp oescernon or cux one lee SEE SHEET ONE D CLOCH PI 14 INTRO 5V RP2 C17 OK j 1800 pf Il 1D o SH START c fe MPX 2 33 MDD 31 MDI 29 MD2 27 MD PI 25 MD4 83 MD5 21 MD6 PI 19 MD 7 A DO cus AAA x 1 DWG NO REV 142820 B Figure 5 2
13. table 2 2 5 to 5 volts bipolar 0 to 5 volts unipolar Jumper selectable see table 2 2 Gain User configurable through installation of two resistors at E1 to E2 and E3 to E4 Factory configured for gain of X1 E5 jumpered to E6 gain above 250 is possible but not recommended see table 2 3 12 bits 11 bits plus sign for 5 volts 3 4 LSB maximum for a 10V voltage change Full Scale Input Voltage Range Resolution Dynamic Error 1 2 iSBX 311 General Information Table 1 1 Specifications continued Accuracy Accuracy max at 25 C Accuracy at 0 to 60 C 0 035 FSR 1 2 LSB 0 20 FSR 1 2 LSB typical 0 36 FSR 1 2 LSB maximum Note Figures are typical and are listed in percent of full scale reading FSR at a gain of 1 At any fixed temperature between 0 and 60 C the accuracy is adjustable to 0 025 1 2 LSB of full scale Gain TC at Gain 1 30 PPM per degree centigrade typical 56 PPM per degree centigrade maximum BIPOLAR UNIPOLAR Offset TC in percent of FCR C 0 0018 0 0047 0 0026 0 0076 0 0036 0 015 0 0063 0 018 0 024 0 069 0 048 0 137 0 116 0 333 0 232 0 665 Offset is measured in bipolar mode and assumes that user supplied gain resistors 10ppm are installed for gains greater than 1 Input Protection 30 volts Input Impedance 20 megohms minimum Conversion Speed 50 microseconds typical Common Mode Rejection Ratio 60 db minimum
14. 12 operation or differential E9 to E12 operation The jumper connections control which of the multiplexer outputs become amplifier inputs For pseudo differential mode operation connect jumpers E8 to E9 and E12 to E13 this allows the ground reference to float with the user input signal DAC MODE SELECTION The operating mode of the A to D converter is jumper selectable via jumpers E14 E15 E16 and E17 to either Unipolar 0 to 5 volts input mode or Bipolar 5 to 5 volts input mode Unipolar operation 0 to 5 volts requires a jumper from E14 to E15 and E16 to E17 to connect two internal DAC resistors in parallel into the signal path Bipolar operation 5 to 5 volts requires a jumper from E15 to E16 This configuration connects only one internal DAC resistor into the signal path and allows the DAC to be offset by 1 0 mA half scale VOLTAGE GAIN SELECTION As shipped from the factory the Multimodule board contains a Preparation for Use iSBX 311 jumper connecting E5 to E6 and no resistors from that they produce The resistors shown in figure 2 3 E3 to E4 and El to E2 This configures the board for must be axial 0 4 inch lead spacing to fit into the a gain of 1 Configuration for a gain other than 1 is mounting positions Ra is beneath U3 Rb is performed by removing the jumper connecting E5 to between U2 and U3 The capacitor Cb in figure 2 3 E6 and installing resistors at the mounting loca must have 0 3 inch lead sp
15. HIGH BYTE command The interrupt line may be used to request an interrupt from the host iSBC microcomputer at the end of a conversion 3 6 PROGRAMMING EXAMPLE Table 3 3 contains a programming example for the Multimodule board that will read data from each of sixteen single ended analog input channels and store the converted data in a 32 byte table in memory A program for a differential system would be similar with the exception that only 8 channel inputs are available The example uses a data table to store up to 32 bytes of converted analog data input through the Multimodule board All 16 channels are scanned implying that the Multi module board is configured to operate in the single ended mode The end of a conversion cycle is sensed by polling for the EOC signal transition The port addresses used in the sample program are for use with an iSBC 80 24 board J6 Multimodule board connector and may have to be altered if another host or another Multimodule connector is required For proper port addresses refer to table 3 1 of this manual Programming Information Table 3 3 Programming Example 32 OFOH OF 1H OFOH H TABLE 31 B 15 HIGH Define data table High byte port address Low byte port address Channel select port address Set data table pointer Set up channel counter Ensure EOC bit RESET READ HIGH BYTE Move next channel address to A WRITE channel a
16. ISBX 311 ANALOG INPUT MULTIMODULE BOARD HARDWARE REFERENCE MANUAL Manual Order Number 142913 001 Copyright 1981 Intel Corporation Intel Corporation 3065 Bowers Avenue Santa Clara California 95051 REVISION HISTORY Original Issue Additional copies of this manual or other Intel literature may be obtained from Literature Department Intel Corporation 3065 Bowers Avenue Santa Clara CA 95051 The information in this document is subject to change without notice Intel Corporation makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Intel Corporation assumes no responsibility for any errors that may appear in this document Intel Corporation makes no commitment to update nor to keep current the information contained in this document Intel Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in an Intel product No other circuit patent licenses are implied Intel software products are copyrighted by and shall remain the property of Intel Corporation Use duplication or disclosure is subject to restrictions stated in Intel s software license or as defined in ASPR 7 104 9 a 9 No part of this document may be copied or reproduced in any form or by any means without the prior written consent of Intel Corporation The following are trademarks of Intel Corporat
17. ace in order to fit properly tions El to E2 Rb and E3 to E4 Ra Refer to table into the mounting position E5 to E7 under the U3 2 3 for a list of resistor values and the voltage gains socket on the board Table 2 2 User Configured Jumpers Jumper Position Jumper Functions Number Comments Mode Selection for Input Multiplexers E19 E20 E21 Connect E19 to E20 single ended operation 16 channels maximum Connect E20 to E21 differential operation 8 channels maximum Mode Selection for Input Multiplexers E8 E9 E11 E12 Connect E8 to E9 and E11 to E12 single ended Connect E9 to E12 differential operation Analog Ground onto Input Returns E10 E12 E13 Connect E10 to E13 to provide an analog ground out to the odd numbered pins of the J1 connectors Connect E12 to E13 for pseudo differential operation the signal grounds float with respect to the board ground thereby eliminating ground loops However the ground differential must not exceed 10V Mode Selection for DAC E14 E15 E16 E17 Connect E14 to E15 and E16 to E17 unipolar operation Connect E9 to E10 bipolar operation Voltage Gain Select for Amplifier E5 E6 E7 Connect E5 to E6 Gain of one Connect E5 to E7 mounting location for user supplied capacitor to control noise E1 E2 E3 E4 Install resistors into mounting locations for user configuration of voltage gain see table 2 3 NOTES indicates the as shipped configuration of the jumpers
18. acking material if possible If this material is not available wrap the product in a cushioning material such as Air Cap TH 240 manufactured by the Sealed Air Corpora tion Hawthorne N J Then enclose in a heavy duty corrugated shipping carton and label FRAGILE to ensure careful handling Ship only to the address specified by Product Service Hotline personnel 5 3 ADJUSTMENT PROCEDURE The adjustments for the iSBX 311 Analog Input Multimodule Board include facilities for user performed offset and voltage gain adjustments The procedures are outlined in the following paragraphs Each Multimodule board is adjusted at the factory however the boards should be readjusted on instal lation and whenever reconfiguration occurs 5 4 TEST EQUIPMENT REQUIRED The test equipment required to adjust the gain and offset for the Multimodule board is as follows a Digital Voltmeter with a voltage range of 0 to 15 volts and accuracy of 0 005 or better b Precision voltage source 0 to 15 volts de 0 001 continuously adjustable source im pedance less than 1 0 ohm 5 5 PRELIMINARY PROCEDURE Before beginning the calibration procedure install the Multimodule board onto a host iSBC micro computer and verify the voltage levels of the de supply voltages as per table 5 1 If any of the voltage levels are out of tolerance they should be readjusted before the calibration procedure is performed 5 1 Service Information
19. board including chapters on general information prepara tion for use programming principles of operation and service information 1 2 DESCRIPTION The Multimodule board shown in figure 1 1 is designed to plug onto any host iSBC microcomputer that contains an iSBX bus connector P1 The board provides 8 differential or 16 single ended analog input channels that may be jumper selected as the application requires The Multimodule board in cludes a user configurable gain and a user selectable voltage input range 0 to 5 volts or 5 to 5 volts The Multimodule board receives all power and control signals through the iSBX bus connector to initiate channel selection sample and hold opera tion and analog to digital conversion 1 3 EQUIPMENT SUPPLIED Since the Multimodule board plugs directly onto the host iSBC board no interface cables are required for Figure 1 1 iSBX 311 Analog Input Multimodule Board 11 General Information the system The following equipment is supplied with the iSBX 311 Analog Input Multimodule Board a Schematic Diagram drawing number 142820 b Two plastic screws 1 4 6 32 c One plastic spacer 1 2 6 32 1 4 COMPATIBLE EQUIPMENT The Multimodule board must be used with a host iSBC microcomputer that contains an iSBX bus connector Multibus interfacing must be performed indirectly by means of a host iSBC microcomputer iSBX 311 The input connector J1 on the Mu
20. c Chatsworth CA Available from any commercial distributor Order by description OBD 5 4 iSBX 311 5 11 SERVICE DIAGRAMS The parts location diagram and schematic dia grams for the Multimodule board are provided in Figures 5 1 and 5 2 respectively On the schematic diagram a signal mnemonic that ends with a slash e g MCSO is active LOW Conversely a signal mnemonic without the slash e g OPTO is active HIGH iSBX 311 Service Information 7 6 5 4 3 pe AME THIS DRAWING CONTAINS INFORMATION CONTENTS MAY NOT BE DISCLOSED WITH IC _ Eco 40 2 PY Pe Laien ert OUT THE PRIOR WRITTEN CONSENT OF INTEL CORPORATION 51 Edo pL APL J al E D LUPUL MR er Tas cC Du ve C Ro Ga Mi doo a C e ss Li Q JO o A PL dh o O HV O 10 Q o QU SS gl fg bos V e e 64 5 PL OIDO A eat Q gt TH QOOC eM 92 SEE WIRE LIST e 2140 UN dr i Q 5 PL ia 6 53 I 0000 S S S FARSIDE NOTES UNLESS OTHERWISE SPECIFIED L ASSEMBLY PART NUMBER 15 142751 002 THIS DOCUMENT PARTS LIST AND WIRE LIST ARE TRACKING DOCUMENTS 2 WORKMANSHIP PER 944 0007 001 MARK WITH ASSEMBLY DASH NUMBER AND REVISION LEVEL WITH PERMANENT CONTRASTING COLOR 12 HIGH NON CONDUCTIVE APPROAIMATELY WHERE SHOWN MARK VENDOR I D WITH PERMANENT CONTRASTING COLOR s JE HIGH NON CONDUCTIVE APPROXIMATELY WHERE SHOWN OMITTED DUE TO SPACE LIMITATIONS UNLESS OTHERWISE SPECIFIED
21. ddress to Mtuli module board and start conversion on channel data READ status byte to check for end of conversion Checking for EOC bit Waiting for end of conversion READ LOW BYTE of data Mask off non data bits of low byte Store low byte data into table Decrement memory pointer READ HIGH BYTE of data from the Multimodule board Store high byte data into table Decrement channel counter Return when all 16 channels serviced Go to next channel 3 3 3 4 CHAPTER 4 PRINCIPLES OF OPERATION 4 1 INTRODUCTION This chapter provides a functional description of the interface signals detailing the circuit operation for the iSBX 311 Analog Input Multimodule Board The functional description of the board includes details on the operation of each of the major components on the board as shown in the functional block diagram in figure 4 1 4 2 iSBX BUS INTERFACE SIGNAL DESCRIPTION The Multimodule board is controlled by the signals on the iSBX bus connector The iSBX bus signals and their functions are detailed in the following paragraphs RESET Reset This active high signal when asserted to the Multimodule board clears the clock divider and interrupt request circuitry on the board The DAC Sample and Hold and SAR devices are not directly affected by RESET MCLK Clock This signal is derived from the host iSBC microcomputer
22. e from board b 1 plastic spacer 1 2 inch 6 32 separate from board c 36 pin connector P1 factory installed onto board NOTE The Multimodule board when installed onto a host iSBC microcomputer occupies an additional card slot located within an iSBC 604 614 Cardcage and adjacent to the component side of the host iSBC micro computer 2 7 PHYSICAL DIMENSIONS The outside dimensions of the Multimodule board are as follows a Width 6 35 cm 2 50 inches Length 9 40 cm 3 70 inches c Height 2 03 cm 0 80 inch Multimodule board only 2 82 cm 1 13 inches Multimodule and iSBC boards 2 1 iSBX 311 Preparation for Use BEE bag Se eg 2 590 250 CONNECTOR Ji MOUNTING HOLE Figure 2 1 Board Dimensions Inches iSBX BUS CONNECTOR P1 Figure 2 1 shows the outside dimensions of the 2 9 JUMPER CONFIGURATION board and figure 2 2 gives the maximum height dimensions for the Multimodule board mounted The 22 user configured jumper positions on the iSBX onto a host iSBC microcomputer 811 Analog Input Multimodule Board allow the user to select the operating mode for the input multi plexers and the DAC and select the voltage gain for the amplifier Table 2 2 lists the functions of the user configurable jumpers The Multimodule board 2 8 DC INTERFACE CHARACTERISTICS is configued to the single ended bipolar mode of operation when shipped from the factory this The dc characte
23. e requirements are outlined in the following paragraphs NOTE Ensure that none of the iSBX bus specifica tions or standards is violated if modifica tion of the Multimodule board is required 2 4 POWER REQUIREMENTS The Multimodule board requires three voltages for operation 5 volts 0 25 volt at 250 mA maximum 12 volts 0 6 volt at 55 mA maximum and 12 volts 0 6 volt at 50 mA maximum All power for the board is drawn through the iSBX bus connector P1 on the board The Multimodule board uses the 12 volt power supply voltage and components R4 and VRI to create a 6 4 volt reference voltage and the DAC provides a 6 3 volt reference voltage from pin 24 for use with the analog circuitry 2 5 COOLING REQUIREMENTS The Multimodule board dissipates 35 73 gram calories minute 0 14 BTU minute of heat and adequate circulation of air must be provided to prevent a temperature rise above 55 C 131 F The Intel Development Systems and other Intel system cardcages provide adequate air circulation for use with Multimodule boards 2 6 MOUNTING REQUIREMENTS Figure 2 1 shows the Multimodule board the loca tion of the iSBX bux connector and the location of the mounting hole The Multimodule will mount onto any host iSBC microcomputer containing an iSBX bus connector and the required mounting hole The mounting hardware supplied with the Multi module board includes a 2 plastic screws 1 4 inch 6 32 separat
24. el 0 OUT CSEL EOC IN LOW ANI 01 Mask for EOC status bit JNZ EOC Wait until EOC IN HIGH MOV C A Save in C register CALL DBYTE IN LOW MOV C A Save in C register CALL DBYTE MVI C cr CALL CO MVI C 1f Prepare a line feed character CALL CO IN CRTS operator ANI RXRDY JZ ADCRNG RET Input request sensed from console device exit calibration routine 5 iSBX 311 Analog Input Multimodule Board in Hardware Reference Manual 142913 001 REQUEST FOR READER S COMMENTS Intel Corporation attempts to provide documents that meet the needs of all Intel product users This form lets you participate directly in the documentation process Please restrict your comments to the usability accuracy readability organization and completeness of this document 1 Please specify by page any errors you found in this manual 2 Does the document cover the information you expected or required Please make suggestions for improvement 3 Is this the right type of document for your needs Is it at the right level What other types of documents are needed 4 Did you have any difficulty understanding descriptions or wording Where 5 Please rate this document on a scale of 1 to 10 with 10 being the best rating NAME e A A ee AE TITLE COMPANY NAME DEPARTMENT ADDRESS CITY a ge ee MATE ZIP CODE Please check here if you require a written reply O WE D LIKE YOUR COMMENTS This document is one of a serie
25. er to obtain correct data l Signal Ground Isolation The signal ground may be isolated from the Multimodule board ground by removing the jumper connecting E10 to E13 and installing one from E12 to E13 This procedure eliminates a potential ground loop problem by connecting the analog signal ground directly to the input of the amplifier Ensure that the potential on your analog signal ground does not exceed 12 volts Failure to do so could result in damage to the amplifiers on the board 2 10 CONNECTOR CONFIGURATION The Multimodule board contains two connectors the iSBX bus connector P1 and the I O connector J1 Each of these is described in the following paragraphs The iSBX bus connector P1 interfaces the Multi module board to any host iSBC microcomputer that contains an iSBX bus connector The signals found on each pin of connector P1 are listed in table 2 4 and described in Chapter 4 The input connector J1 interfaces the Multimodule board to the application via user supplied analog data lines channels The channel input found on each pin of connector J1 is listed in table 2 5 As the table shows the Multimodule board provides all but four signals that are present on the J2 connector of the iSBC 711 and 732 boards the non supported signals include Clock Out External Trigger In EOC Status Out and EOS Status Out on pins 40 42 44 and 46 respectively Table 2 6 contains a list of part numbers for compatible
26. he positive lead of the DVM to E22 and the negative lead to jumper post E18 c Call the ADCOFF subroutine and adjust the R2 resistor to give a 0 volts reading on the DVM 5 8 ADC OFFSET ADJUSTMENT PROCE DURE After the amplifier is adjusted adjust the ADC offset as follows 5 2 0 to 5 volts 0 00061 volts 5 volts 4 9988 volts iSBX 311 a Connect the precision voltage source to the connection points required for channel 0 as listed in table 5 2 b Set the voltage source for the appropriate offset input as required for the ADC range being used refer to table 5 3 c Call the ADCOFF subroutine and adjust the R1 resistor until the readings on the monitor alter nate equally between 000 and 001 as listed in table 5 3 Table 5 2 ADC Offset and Range Adjustment Test Input Voltage Source Connection Input Single ended Differential J2 pin 4 J2 pin 3 J2 pin 3 J2 pin 4 J2 pin 6 J2 pin 3 Table 5 3 Voltage Source Input Required for ADC Offset and Range Adjustment Operating Offset Adjust Range Adjust Mode Reading Reading 4 9982 volts 4 9963 volts 5 9 ADC RANGE ADJUST PROCEDURE After the amplifier offset and ADC offset adjust ments are made adjust the ADC range as follows 8 Connect a precision voltage source to the connection points for channel 0 input as listed in table 5 2 b Set the precision voltage source to the appro priate range input as required for the ADC range being used
27. iSBX 311 Analog Input Multimodule Board Schematic Diagram Sheet 2 of 2 5 9 5 10 APPENDIX A CALIBRATION PROGRAMS The calibration program presented in this appendix is intended to show a typical approach to pro gramming the iSBX 311 Analog Input Multimodule Board when calibrating the ADC as explained in Chapter 5 of this text The program contains port addresses that are valid for an iSBC 80 24 board with the Multimodule board mounted onto the J6 Multimodule connector If a different configuration is required refer to the hardware reference manual for the host iSBC microcomputer to determine the proper port addresses Start conversion on channel 0 READ LOW BYTE status from Multimodule board READ HIGH BYTE of data from Multimodule board Output HIGH BYTE to console output device READ LOW BYTE of data from the Multimodule board Output LOW BYTE to console output device Prepare a carriage return character Output carriage return to console output device Output line feed to console output device Check the status byte of the console device for halt request from Mask for keyboard input request No input request sensed perform calibration test again EXTRN DBYTE RXRDY CSEL EQU OFOH Channel select port address LOW EQU OF1H LOW data byte port address HIGH EQU OF OH HIGH data byte port address STATUS EQU OF1H STATUS byte port address CSEG ADCOFF ADCRNG MVI AO Select chann
28. in the SAR device One cycle for the SAR consists of 12 successive data approximations and each approxi mation determines the proper value for one data bit position within the SAR starting with the most significant bit and ending with the least significant bit As soon as the state of the last bit within the SAR is determined the EOC signal from pin 3 of the SAR goes LOW indicating that conversion is completed The voltage comparator circuitry includes some internal DAC circuitry amplifier U10 diodes CRI and CR2 resistor R13 and capacitor C18 For each bit of the conversion operation the comparator circuitry compares the value held in the Sample and Hold register with the conversion value con tained in the DAC and with the results of the compare operations builds a converted data word in the SAR If U10 senses a positive current flow at pin 3 then a LOW is generated from pin 7 and fed back into the SAR on pin 11 to turn ON that particular bit of the conversion data word Conversely if U10 senses a negative current flow then a HIGH is generated from pin 7 to turn OFF that bit of the conversion data word Diodes CR1 and CR2 limit the voltage swing at the comparator in order to increase conversion speed 4 14 CLOCK DIVIDER CIRCUITRY The Multimodule board includes on board clock divider circuitry U8 that uses the MCLK signal 9 to 10 MHz clock from the iSBX bus connector Device U8 divides the MCLK signal by 25 t
29. ion 5 ere a wide EAS a 5 1 Service and Repair Assistance 5 1 Adjustment Procedures 5 1 Test Equipment Required 5 1 Preliminary Procedure 5 1 A to D Converter ADC Circuitry Calibration Procedure 5 2 Amplifier Offset Adjust Procedure 5 2 ADC Offset Adjust Procedure 5 2 ADC Range Adjust Procedure 5 2 Replaceable Parts 5 2 Service Diagrams 5 4 TABLE TITLE PAGE 1 1 e d TEEN 1 2 2 1 DC Interface Characteristics 2 2 2 2 User Configured Jumpers 2 4 2 3 Gain Resistor Values 2 5 2 4 iSBX BUS Pin Assignment 2 5 2 5 Connector J1 Pin Assignment 2 7 2 6 Compatible J1 Connector Details 2 7 3 1 I O Port Addresses 3 1 3 2 WRITE Commands dpi bes 3 2 TABLES TABLE TITLE PAGE 3 3 Programming Example 3 3 5 1 Power Supply Voltage Requirements 5 2 5 2 ADC Offset and Range Adjustment Test Input Lise dinars 5 2 5 8 Voltage Source Input Required for ADC Offset and Range Adjustment 5 2 5 4 Replaceable Parts 5 3 5 5 Manufacturer Codes 5 4 ILLUSTRATIONS FIGURE TITLE PAGE 1 1 iSBX 311 Analog Input Multimodule Board
30. ion and its affiliates and may be used only to identify Intel products BXP Intel Megachassis CREDIT Intelevision Micromap i Intellec Multibus ICE gt iRMX Multimodule iCS iSBC PROMPT im iSBX Promware Insite Library Manager RMX 80 Intel MCS System 2000 UPI uScope and the combination of ICE iCS iRMX iSBC iSBX MCS or RMX and a numerical suffix PREFACE This manual provides general information preparation for use programming information principles of operation and service information for the iSBX 311 Analog Input Multimodule Board Supplementary information is provided in the following documents Intel MCS 85 User s Manual Order No 9800366 Intel Peripheral Design Handbook Order No 9800676 Intel Multibus Specification Order No 9800683 Intel iSBX Bus Specification Order No 142686 001 111 CONTENTS CHAPTER 1 GENERAL INFORMATION PAGE Introduction edu a ME a da a 1 1 Description cuss toad eine ees te fouet 1 1 Equipment Supplied 1 1 Compatible Equipment 1 2 Specifications Laine tenues dus Anna 1 2 CHAPTER 2 PREPARATION FOR USE Introduction Lists o x EE E ESPERE suse 2 1 Unpacking and Inspection 2 1 Installation Considerations 2 1 Power Requirements 2 1 Cooling Requirements 2 1 Mounting Requirements 2 1 Physical Dimensi
31. ltimodule board is compatible with the J2 and J3 connectors on the iSBC 711 Analog Board and on the iSBC 732 Combination Analog I O Board As a result the Multimodule board may be used in most analog input applications satisfied by an iSBC 711 or iSBC 732 board The Multimodule board interfaces readily to an iCS 910 Analog Input Signal Conditioning Termination Panel in the same manner as the iSBC 711 and 732 boards 1 5 SPECIFICATIONS The specifications for the iSBX 311 Analog Input Multimodule Board are listed in table 1 1 Table 1 1 Specifications POWER REQUIREMENTS Vcc 5 volts 0 25 volts Vaa 12 volts 0 6 volts Vss 12 volts 0 6 volts lec 250mA maximum lad 50mA maximum Iss 55mA maximum PHYSICAL CHARACTERISTICS Height 2 03 cm 0 80 inch 2 82 cm 1 13 inches Width 6 35 cm 2 50 inches Length 9 40 cm 3 70 inches Weight 85 gm 2 31 ounces Multimodule board only Multimodule and iSBC boards ENVIRONMENTAL REQUIREMENTS Operating Temperature Relative Humidity 0 to 60 C 32 to 131 F To 90 without condensation INTERFACE COMPATIBILITY Connector P1 Interface Connector J1 Interface Compatible with the iSBX bus interface requirements Analog pinout compatible with the iSBC 711 and 732 Analog Board input connector format Connector details are contained in table 2 5 OPERATING CHARACTERISTICS Inputs 8 differential 16 single ended Jumper selectable see
32. monostable multivibrator U9 is triggered at the end of the period when IOWRT and MCSO are LOW The mutivibrator generates a 10 to 15 micro second Sample and Hold SH pulse to sample the analog data into the Sample and Hold circuitry U7 and also generates a Start Conversion pulse START to trigger the SAR to start a data conversion sequence 4 8 BUFFER AMPLIFIERS The two buffer amplifiers both contained in U4 provide high impedance for the input multiplexers U5 and U6 and for the signal source to prevent unnecessary input line lading The buffer amplifiers also provide a low input impedance for the differen tial amplifier U3 4 9 DIFFERENTIAL AMPLIFIERS The differential amplifier U3 operates as a unity gain bipolar amplifier The amplifier provides a single ended output that is the difference between the outputs on pin 1 and pin 7 from the buffer amplifiers U4 The output of the amplifier feeds the gain select and offset adjust stage of U3 The amplifier includes four 0 02 percent resistors R8 R9 R11 and R12 to provide greater than 60 db Common Mode Rejection CMR Capacitors C11 and C12 are included to filter high frequency noise from the data 4 10 AMPLIFIER GAIN SELECT The gain select is user configurable through jumper resistor locations El through E7 factory configuration includes a jumper from E5 to E6 which configures the board to a gain of one The Multimodule board may be configured for a maxi
33. mum gain of 250 by installing two resistors Rb from El to E2 and Ra from E3 to E4 and removing the jumper from E5 to E6 Configuration also includes installation of filter capacitor Cb from E5 to E7 to limit the bandwidth More jumper wiring information is contained in Chapter 2 4 11 AMPLIFIER OFFSET ADJUST The offset adjust resistor R2 and resistor R10 are responsible for controlling the offset if any induced into the input by the two buffers the differential amp and the gain select circuitry Chapter 5 of the iSBX 311 text includes an adjustment procedure for the offset R2 Once the offset on the channel input is cor rected the channel input is ready to be passed on to the sample and hold stage 4 12 SAMPLE AND HOLD CIRCUITRY The sample and hold device U7 samples the input signal on pin 3 for 15 microseconds and holds the sample for the duration of the conversion cycle By sampling and holding the input the Multimodule board freezes the input signal for the duration of the analog to digital A to D conversion so that a more accurate A to D conversion can be performed When the sample and hold device senses a HIGH on pin 8 the SH signal from U9 it samples the input on pin 3 Capacitor C9 stores the sample of the input signal voltage during the conversion 4 13 ANALOG TO DIGITAL CONVERSION The A to D Converter ADC logic on the Multi module board consists of circuits to perform several distinct fu
34. nal block in the figure is explained in detail in the following paragraphs 4 4 INPUT CHANNEL SELECTOR Logic device U11 serves as a decoding device to determine which input chjannel to the Multimodule board is selected for output to the host iSBC 4 Principles of Operation microcomputer The channel selection byte refer to figure 3 1 from the host is decoded into MPXA MPXB MPXC MPX1 and MPX2 signals to operate the channel selector devices U5 and U6 These signals select one of 8 differential or one of 16 single ended analog input channels 4 5 CHANNEL MULTIPLEXERS The channel multiplexers U5 and U6 receive the analog inputs from an external source As shipped from the factory the analog multiplexers are set up to operate in the single ended mode In single ended mode operation only one multiplexer is enabled on any operation to select channel data input one of sixteen channel inputs In differential mode opera tion the Multimodule board allows both U5 and U6 to operate simultaneously in multiplexing both halves of a differential channel input signal selection of one of eight channel inputs As a safety feature the multiplexers contain an internal device to protect against overvoltage surges of up to 30 volts 4 6 OUTPUT DATA BUFFERS The output data buffers U12 and U13 provide an 8 bit register in which converted data for the host iSBC microcomputer can be held until requested Depending on the command
35. nalog input channels The high order bits X X X X are not used The WRITE command is issued via an OUT instruction When the OUT command is executed by the host iSBC microcomputer the accumulator must contain the proper channel address as listed in table 3 2 When a READ command IN instruction is directed to one of the legal Multimodule port addresses and is decoded by the Multimodule board the command causes converted digital data to be sent to the host iSBC microcomputer from the Multimodule board data buffers The READ command may call for either the status of the Multimodule board the LOW BYTE of converted data or the HIGH BYTE of converted data The data recall is the result of an analog data conversion sequence from the channel selected by the previous WRITE command The distinction between the LOW and HIGH data bytes is performed by the port address used refer to table 3 1 NOTE The RESET occurring as a result of power on will not clear the interrupt request signal INTRO from the Multimodule board Therefore a READ HIGH BYTE command should be issued after power up to clear the INTRO signal before starting an operation Table 3 1 I O Port Addresses FUNCTION READ HIGH BYTE X0 X2 X4 or X6 READ LOW BYTE X14 X8 X5 or X7 and READ STATUS WRITE CHANNEL XO through X7 SELECT ADDRESS Multimodule port address 8 BIT PORT ADDRESS 16 BIT PORT ADDRESS COMMENTS X0 X4 X8 or XC X2 X6 XA
36. nctions including e a reference voltage pin 24 of U1 e a Digital to Analog Converter U1 e a voltage comparator U10 e a Successive Approximation Register SAR U2 e a clock U8 e a DAC offset circuit R1 and R14 and e a Dac gain adjust circuit R3 R5 R6 and R7 Each of these is discussed in detail in the following paragraphs A voltage reference circuit of 6 3 volts within the DAC pin 24 of U1 establishes the full scale current reference for the DAC More information on the DAC can be found in the data book and data sheets for the DAC device The DAC voltage gain adjust circuitry R3 R5 R6 and R7 modifies the full scale voltage reference output from the DAC by a maximum of 0 596 in order to accurately set the full scale reading for the DAC Chapter 5 contains a procedure for adjusting the DAC voltage gain R3 The DAC offset adjust circuitry R1 and R14 establishes a true zero reading for unipolar opera tion or a negative full scale reading for bipolar operation Chapter 5 contains a procedure for adjusting the DAC offset R1 Principles of Operation The SAR is a 12 bit register that sequentially tests each bit against the value in the sample and hold register The state of each bit of the final output is successively determined by the operation of DAC the sample and hold register and the comparator circuits The result of the operation of these ciruits builds bit by bit a digital data word with
37. nded Select channel Select channel Select channel Select channel Select channel Select channel Select channel Select channel 08 input 09 input 10 input 11 input 12 input 13 input 14 input 15 input Notes XX is any legal WRITE port address as defined in table 3 1 Refer to the respective Hardware Reference Manual for the host iSBC microcomputer for port addresses The Channel Selection Byte must be contained in the accumulator i in the CPU on the host iSBC microcomputer board 3 2 iSBX 311 The BUSY status bit bit 1 is generated by the SAR to show the condition of the successive approximation routine that occurs for each data input sequence on the Multimodule board When the dat conversion is started the BUSY signal goes LOW a maximum of 3 8 microseconds after START goes LOW When the board is finished converting the analog data to digital data BUSY goes HIGH indicating that the conversion within the SAR is fully completed i e data is available in the form of a HIGH BYTE and LOW BYTE The EOC status bit bit 0 is used by the host iSBC microcomputer to determine the end of conversion when the host must determine the status of the Multimodule board by polling the status byte The EOC status bit is reset by issuing a READ HIGH BYTE command to the Multimodule board The interrupt line INTRO from the Multimodule board is an inverted version of the EOC signal and is also reset on a READ
38. o create a CLOCK signal with a nominal 2 7 to 2 5 micro second period CLOCK controls the successive ap proximation cycle within the SAR the nominal con version time for one SAR cycle 12 bit approxima tion including sample and hold time is 50 micro seconds 4 15 INTERRUPT GENERATION CIRCUITRY When the end of conversion signal is output from the SAR device the falling edge advances the count in U8 generating an output from pin 3 of U8 which requests an interrupt from the host iSBC micro computer The interrupt request from U8 remains active until cleared by reading the HIGH BYTE of data or by receiving RESET the reset signal from the iSBX bus connector 4 3 Principles of Operation 4 16 RESET GENERATION CIRCUITRY A RESET operation on the Multimodule board clears only the interrupt request line INTRO from U8 The RESET operation is performed through device U14 and Q1 and may be generated for the Multimodule board in one of two methods a Ifa RESET command is issued by the host iSBC microcomputer the command is sensed on the Multimodule board as RESET via pin 5 of the iSBX bus connector The power on reset will not clear the interrupt request line 4 4 b iSBX 311 If a READ HIGH BYTE command is issued to the Multimodule board to input the upper byte of the data word U14 pin 3 generates a pulse which is inverted by Q2 to reset U8 clearing the interrupt request line INTRO from U8 The READ
39. of the host the buffers can pass either the HIGH BYTE or the LOW BYTE of the last data conversion to the host via the bidirectional bus The buffers are held in a high impedance condition when not in use The data in the register may be read as many times as desired however after reading the HIGH BYTE the EOC status bit bit 0 is reset and should be considered not valid until after the next data conversion sequence To pass the LOW BYTE of converted data bits D3 D2 D1 and DO on MD7 through MD4 and the status bits on MD3 through MDO the Multimodule board must sense a LOW on the IORD line a LOW on MCSO and a HIGH on MAO These signals enable the output buffers U12 and U13 to operate and the MAO signal also provides the output sequencing control for the output buffers The MAO signal is initially HIGH to select the B inputs to the U12 and U13 multiplexers i e EOC BUSY START zero DO D1 D2 and D3 are output on data lines MDO through MD7 respectively to the host iSBC microcomputer To pass the HIGH BYTE of converted data bits D4 D5 D6 D7 D8 D9 D10 and D11 on MD7 through MDO the Multimodule board must sense a LOW on the IORD line a LOW on MCSO and a LOW on MAO When MAO goes LOW the A inputs to the 4 2 iSBX 311 multiplexers data bits D4 D5 D6 D7 D8 D9 D10 and D11 are connected to the MDO through MD7 data lines respectively 4 7 SAMPLE START PULSE GENERATOR The
40. og Return Not Used Not Used Not Used Not Used Not Used Not Used Analog Return 12v Not Used Channel 0 Channel 8 Channel 1 Channel 9 Channel 2 Channel 10 Channel 3 Channel 11 Channel 4 Channel 12 Channel Channel Channel Channel 14 Channel Channel 15 Not Used Not Used Not Used Not Used Not Used Not Used Analog Return 12v Preparation for Use Not Used Channel 0 High Channel 0 Low Channel 1 High Channel 1 Low Channel 2 High Channel 2 Low Channel 3 High Channel 3 Low Channel 4 High Channel 4 Low Channel 5 High Channel 5 Low Channel 6 High Channel 6 Low Channel 7 High Channel 7 Low Not Used Not Used Not Used Not Used Not Used Not Used Analog Return 12v Note All odd numbered pins 1 3 49 are on component side of the board Pin 1 is the right most pin when viewed from the component side with the board extractors at the top An marks those pins that are available on the iSBC 711 and 732 board interface but not available on the Multimodule board interface Parallel 1 0 Connector Parallel 1 0 Connector Parallel 1 0 Connector Notes Table 2 6 Compatible J1 Connector Details Connector Type Centers Inches Female Flat Crimp Female Soldered Female Wirewrap indicates that the connector includes screw hold flanges that may have to be removed before installation Vendor GTE VIKING MASTERITE TI VIKING ITT CANNON Vendo
41. on for the user installed capacitor Cb in figure 2 3 under the U4 socket The capacitor operates with Ra to increase the noise immunity of the board at the expense of reducing the bandwidth Capacitor Cb provides the user the ability to dampen high frequency noise at the U3 amplifier for applica tions using a higher gain The capacitor works with Ra to form a time constant of approximately 1mS duration to allow time for the amplifier output to settle The value of the capacitor is dependent on the value of resistor Ra as shown in the following equation Table 2 4 iSBX BUS Pin Assignment SIGNAL GROUND ME M DATA BIT 0 MD1 M DATA BIT 1 MD2 M DATA BIT 2 MD3 M DATA BIT 3 MD4 M DATA BIT 4 MD5 M DATA BIT 5 MD6 M DATA BIT 6 MD7 M DATA BIT 7 GND SIGNAL GROUND IORD IO READ COMMAND IOWRT IO WRITE COMMAND MAO M ADDRESS 0 Reserved Reserved RESET SIGNAL GROUND 12V od Reserved Reserved Reserved Reserved Reserved M CHIP SELECT 0 Reserved 5V 5V Reserved M INTERRUPT 0 Reserved Reserved M PRESENT M CLOCK 5V 12V MCSO0 MINTRO 2 5 Preparation for Use 8 Ra Cb 1 mS delay therefore Capacitance Cb SGT delay Where Ra is listed in terms of ohms and Cb in terms of farads NOTE When changing channels with a Cb capa citor installed onto the Multimodule board the first conversion should be ignored and a second conversion of the same channel should be performed 1 millisecond lat
42. ons 2 1 DC Interface Characteristics 2 2 Jumper Configuration 2 2 Connector Configuration 2 6 Board Configuration 2 6 Board Installation SNE ENEE EEN rus 2 6 CHAPTER 3 PROGRAMMING INFORMATION Introduction uoti bua ess me de 9 1 Addressing ee ee Nue e iur ge 9 1 Command Format 3 1 Data Formater oro bh doses 3 2 Status Format 3 2 Programming Example 3 3 iv CHAPTER 4 PRINCIPLES OF OPERATION PAGE Introduction ed te On Se A RS Ebr 4 1 iSBX Bus Interface Signal Description 4 1 Functional Description 4 Input Channel Selector 4 1 Channel Multiplexers 4 5 Output Data Buffers 4 5 Sample Start Pulse Generator 4 5 Buffer Amplifiers 4 5 Differential Amplifiers 4 5 Amplifier Gain Select 4 5 Amplifier Offset Adjust 4 5 Sampleand Hold Circuitry 4 6 Analog to Digital Conversion 4 6 Clock Divider Circuitry 4 6 Interrupt Generation Circuitry 4 6 Reset Generation Circuitry 4 7 CHAPTER 5 SERVICE INFORMATIO Introduct
43. ope o 9o T 9s T 97 Figure 3 2 Data Format 3 5 STATUS FORMAT Status for the Multimodule board is contained in the three least significant bits of the LOW BYTE of data see figure 3 2 The status is read by the host iSBC microcomputer whenever a READ LOW BYTE command is issued by the host iSBC microcomputer to the Multimodule board When a READ LOW BYTE command is issued the status bits are released onto the MDO MD1 and MD2 data lines The START status bit bit 2 is used by the host iSBC microcomputer to determine whether or not the A to D converter on the Multimodule board has started data conversion When the START bit is LOW it indicates that the Multimodule board is in the process of sampling the analog data input i e the A to D conversion is begun When the START bit is HIGH it indicates that the data sampling is completed Table 3 2 WRITE Commands CHANNEL SELECTION BYTE Single Ended Differential Single Ended Differential Single Ended Differential Single Ended Differential Single Ended Differential Single Ended Differential Single Ended Differential Single Ended Differential FUNCTION Select channel 00 input Select channel 01 input Select channel 02 input Select channel 03 input Select channel 04 input Select channel 05 input Select channel 06 input Select channel 07 input Single Ended Single Ended Single Ended Single Ended Single Ended Single Ended Single Ended Single E
44. r Part No 3415 0000 WITH EARS 3415 0001 W O EARS 88083 1 609 5015 SD6750 SERIES 6AD01 25 1A1 D0 3KH25 9JN5 NDD8GR25 DR H X H421011 25 3KH25 JND5 EC4A050A1A 2 7 Preparation for Use o iSBX 311 ANALOG INPUT BUFFER CHANNEL O AMP l I ANALOG D I CHANNEL 7 DIFFERENTIAL AMP gt CHANNEL SELECTOR DECODE U11 BUFFER OE12 AMp CHANNEL 8 ANALOG INPUT rad MULTIPLEXER U5 CHANNEL F E13 O C E10 SIGNAL GROUND L BOARD GROUND Figure 2 4 Single Ended Input Configuration BUFFER CHANNELO HI AMP ANALOG INPUT MULTIPLEXER U6 CHANNEL 7 HI DIFFERENTIAL CHANNEL AMP SELECTOR DECODE U11 BUFFER AMP CHANNELO LOW ANALOG INPUT MULTIPLEXER i U5 CHANNEL 7 LOW E13 E10 a _SIGNAL GROUND ane GROUND Figure 2 5 Differential Input Configuration 2 8 iSBX 311 Preparation for Use MULTIMODULE BOARD 1 2 THREADED PLASTIC SPACER MICROCOMPUTER BOARD 1 4 6 32 PLASTIC SCREW Figure 2 6 Mounting Technique 2 9 2 10 CHAPTER 3 PROGRAMMING INFORMATION 3 1 INTRODUCTION This chapter describes the user programming required for the iSBX 311 Analog Input Multimodule Board Included are sections on addressing com mand formats data selection formats interrupt servicing and programming examples 3 2 ADDRESSING The Multimodule board is addressed by executing an
45. ristics of the Multimodule board at includes jumpers from E5 to E6 E8 to E9 E10 to the J1 connector are listed in table 2 1 E13 E11 to E12 E15 to E16 and E19 to E20 The Table 2 1 DC Interface Characteristics Output Type lo MAX Vo MAX lou MAX Von MIN Signal Drive mA lo MAX uA lou MAX MDO MD7 TRI 2 0 200 2 4 130 MINTRO TTL 1 6 100 2 4 40 Type lin MAX Vi MAX lin MAX Vin MIN C MAX Receiver Vit 0 4 Vin 2 4 PF TRI 0 8 2 0 MDO MD7 MAO TTL MCS0 TTL MRESET TTL IOWRT IORD TTL MCLK ETE 2 0 TTL Standard Totem Pole Output TRI Three State 2 2 iSBX 311 iSBX BUS CONNECTOR MALE iSBX BUS CONNECTOR FEMALE Preparation for Use SOCKET MICROCOMPUTER BOARD Figure 2 2 Mounting Clearances Inches following paragraphs give more details on the various other jumper configurations available to the user INPUT MULTIPLEXER MODE SELECTION Jumpers E19 E20 and E21 configure the multi plexer enable logic for either single ended connect E19 to E20 or differential E20 to E21 operation Single ended operation allows only one of the input multiplexers to be enabled differential operation requires that both multiplexers be enabled to input both halves of the differential signal INPUT MULTIPLEXER CONFIGURATION Jumpers E8 E9 E11 and E12 configure the Multi module board for either single ended connect E8 to E9 and E11 to E
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47. t iSBC microcomputer board When HIGH MCSO holds the bidirectional data bus in a high impedance state MAO Byte Selector This input from the host iSBC microcomputer is used during a READ opera tion to select whether the data put on the bidirec tional bus by the Multimodule board is to be the high or low byte of the last conversion When MAO is LOW along with MCSO and IORD the Multimodule board gates the HIGH BYTE data bits D11 D10 D9 D8 D7 D6 D5 and D4 onto MD7 MDO respectively to the host When MAO is HIGH the Multimodule board gates the LOW BYTE data bits D3 D2 D1 DO 0 START BUSY and INTRO onto MD7 MDO respectively 0 indicates that the bit position is not used and may be ignored INTRO Interrupt 0 This active high output signal provides an indication to the host iSBC microcom puter that the analog data conversion for the last channel is completed BUSY m0 and that service from the host iSBC microcomputer is required The falling edge of BUSY advances the count in the binary counter U8 changing the output from pin 3 to a HIGH This output is the interrupt request signal INTRO from the Multimodule board and may be cleared by either a RESET pulse to U14 pin 12 or by performing a READ HIGH BYTE com mand decode from U14 pin 3 which is inverted to reset U8 4 3 FUNCTIONAL DESCRIPTION The functional description is based upon the functional block diagram shown in figure 4 1 Each functio
48. tline you should have the following information available a Date you received the product b Complete part number of the product including dash number On boards this number is usually silk screened onto the board On other MCSD products it is usually stamped on a label c Serial number of product On boards this number is usually stamped on the board On other MCSD products the serial number is usually stamped on a label d Shipping and billing addresses If your Intel product warranty has expired you must provide a purchase order number for billing purposes f If you have an extended warranty agreement be sure to advise the Hotline personnel of this agreement Use the following telephone numbers for contacting the Intel Product Service Hotline All U S locations except Alaska Arizona amp Hawaii 800 528 0595 All other locations 602 869 4600 TWX Number 910 951 1330 Always contact the Product Service Hotline before returning a product to Intel for repair You will be given a repair authorization number shipping instructions and other important information which will help Intel provide you with fast efficient service If you are returning the product because of damage sustained during shipment or if the product is out of warranty a purchase order is required before Intel can initiate the repair In preparing the product for shipment to the Repair Center use the original factory p
49. to provide synchronous opera tion MCLK is a 9 to 10 MHz clock provided by the host iSBC microcomputer It is used by the Multi module board to generate a 2 7 to 2 5 microsecond clock for the on board Successive Approximation Register SAR MD0 MD7 Bidirectional data bus These eight bidirectional data lines provide a means of trans ferring commands and data to or form the Multi module board When not in use the MDO MD7 lines are held at high impedance When both MCS0 and IORD or MCSO and IOWRT are LOW the data lines are enabled IORD Read Command This active low signal is generated by the host iSBC microcomputer as a command to the Multimodule board to input data to the host IORD works with MCSO and MAO to enable the bidirectional data bus MDO MD7 for input to reset the clock divider interrupt request circuitry and to select whether the low or high data byte is to be sent to the host IOWRT Write Command This active low signal is generated by the host iSBC microcomputer as a command to the Multimodule board to accept data present on the bidirectional data bus Along with MCSO the IOWRT signal causes the channel selection circuitry to be loaded with the address of the channel from which input is desired and causes the data conversion process to begin MCSO Select MCSO is an active low input signal to the Multimodule board to allow it to accept either an IORD or IOWRT command from the hos
50. user supplied connectors to interface to the 50 pin J1 connector on the Multi module board 2 6 iSBX 311 2 11 BOARD CONFIGURATION The Multimodule board may be configured to operate in one of four modes single ended with unipolar analog to digital A to D circuitry opera tion single ended with bipolar A to D circuitry operation differential with unipolar A to D circuitry operation and differential with bipolar A D circui try operation Figure 2 4 shows a typical configura tion for the Multimodule board in a single ended input application and figure 2 5 shows a typical differential input application Figure 2 4 shows the input stages to the Multimod ule board when configured for the single ended operation The single ended analog channel inputs may be used with the A to D circuitry operating in either the unipolar or bipolar mode The only hardware difference between the single ended bipolar and single ended unipolar A to D circuitry operation is that the A to D converter configuration changes The input stages for the Multimodule board config ured for differential operation are shown in figure 2 5 In this configuration the differential analog channel inputs may be used wA to D circuitry operating in either the unipolar or bipolar mode 2 12 BOARD INSTALLATION The Multimodule board mounts directly onto a host iSBC microcomputer Figure 2 6 shows the assembly of the boards u mounting screws and spacer Install the
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