Digital Analogue Input/Output Module ADC-42 Document Part Documen
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ADC-42
Digital Analogue Input/Output Module
ADC-42 Document Part Document Reference Document Issue Level Manual covers PCBs identified 0127-1014 ADC-42\.\0127-1014.Doc ADC-42 Revision
rights reserved. part this publication reproduced, stored retrieval system, transmitted, form means, electronic, mechanical, photocopied, recorded otherwise, without prior permission, writing, from publisher. permission contact Blue Chip Technology. Information offered this manual correct time printing. Blue Chip Technology accepts responsibility inaccuracies. This information subject change without notice. trademarks registered names acknowledged.
Blue Chip Technology Ltd. Chowley Oak, Tattenhall Chester, Cheshire 9EX. Telephone 01829 772000 Facsimile 01829 772001.
Amendment History
Issue Level
Issue Date 10.1.92
Author
Amendment Details First issue. Window front cover logo. 98/087
Contents
INTRODUCTION. SPECIFICATION. Electrical Specification Physical Specification Electromagnetic Compatibility (EMC). Specification USER ADJUSTMENTS Selecting Base Address. Port INPUT CONNECTIONS Detail Connections USING Analogue Inputs 4.1.1 Analogue Input Options 4.1.2 Example Program Analogue Outputs. Programmable Digital I/O. Interrupts. APPENDIX APPENDIX PC/XT/AT Port APPENDIX PC/XT Interrupt APPENDIX Interrupt
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Introduction
INTRODUCTION
card versatile input output subsystem, having both analogue digital capability. card provide: Digital inputs outputs. Channels analogue output. Channels single-ended analogue input. Channels differential analogue input. Interrupt generator.
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Specification
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SPECIFICATION Electrical Specification
Analogue Input
Number channels Resolution Conversion Time Input Ranges (uni-polar) Input Ranges (bi-polar) Maximum Input Voltage Differential Microseconds 0-5V 0-10V +/-2.5V, +/-5V, +/-10V (Link Selectable) Single Ended
Analogue Output.
Number Channels Resolution Output Range Maximum Load Current 0-10V
iii. Programmable Digital
Number Channels High Logic Levels Logic Levels Sink Current (Output) Source Current Source Current 2.4V 5.5V 0.8V 1.7mA 0.45V -200uA 2.4V -1mA 2.4V
Power Requirement
Power Requirement Power Dissipation 300mA +/-12V 50mA 2.25W
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Specification
Physical Specification
Height Width Depth 107mm 15mm 132mm
Electromagnetic Compatibility (EMC)
This product meets requirements European Directive (89/336/EEC) eligible bear mark. been assessed operating Blue Chip Technology Icon industrial However, because board installed variety computers, certain conditions have applied ensure that compatibility maintained. meets requirements industrial environment (Class product) subject those conditions. board must installed computer system which provides screening suitable industrial environment. recommendations made computer system manufacturer/supplier must complied with regarding earthing installation boards. board must installed with backplate securely screwed chassis computer ensure good metal-to-metal (i.e. earth) contact. Most problems caused external cabling boards. Analogue boards fitted with ribbon cable connectors metal mounting bracket require particularly careful installation external cabling. imperative that external cabling board totally screened, that screen cable connects metal bracket board hence earth. cabling must totally screened; type ribbon cable which rolled round form with braided wire screen best. Standard ribbon cable will adequate unless contained wholly within cabinetry housing industrial Keep unscreened section short possible. mounting bracket board includes captive screen earth point. Connect screen cable this shortest possible wire.
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Specification
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difficulty with interference experienced cable should also fitted with ferrite clamp close possible connector. preferred type Chomerics clip-on style, type H8FE-1004-AS. recommended that cables kept short possible, particularly when dealing with level signals. Ensure that screen external cable bonded good earth remote cable. Failure observe these recommendations invalidate compliance.
Warning This Class product. domestic environment this product cause radio interference which case user required take adequate measures.
Specification
Blue Chip Technology Icon industrial fitted with this card meets following specification: Emissions: 55022:1995 Radiated Conducted Immunity: 50082-1:1992 incorporating Electrostatic Discharge 801-2:1984 Performance Criteria 801-3:1984 Performance Criteria 801-4:1988 Performance Criteria Class Class
Radio Frequency Susceptibility
Fast Burst Transients
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User Adjustments
USER ADJUSTMENTS Selecting Base Address
board located slot motherboard must appear specified position `address') port map. Available positions shown IBM-PC Technical Reference Guide. However, those possess copy this document good place location normally allocated prototyping card supplied IBM. This address decimal. Blue Chip Technology cards preset this address factory. However, devices should used while same address since contention will occur neither board will work. your machine contains card with conflicting address then another reasonably safe address (Hex). links provided board base address board within IBM-PC port map. address binary with presence link representing absence link representing base address decimal (300 Hex) following pattern links indicated: Figure Selecting Base Address Note: View board with back panel RHS. Bits port address links.
More example addresses shown Appendix Note: cards must occupy same address.
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User adjustments
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Port
address which this link effectively base address card. basic programs shown throughout this manual will input base have link LKA. ports used these programs referenced this base value. list address offsets functions ports shown below.
Base Base Base Base Base Base Base Base Base Base Base Base Base Base Busy Flag (Read) Result High Byte (Read) Result Byte (Read) Start Conversion (Read) Update Output (Write) Byte Load Register (Write) High Byte Load Register (Write) Byte Load Register (Write) High Byte Load Register (Write) Digital Port Digital Port Digital Port Digital Control Register (Write) Analogue Multiplexer Channel Address (Write) Programmable Interrupt Source Control Register (Write)
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Input Connections
INPUT CONNECTIONS
insulation displacement connector (IDC) provided rear panel board channel signal connection. access individual channels required, ribbon cable used connect channels screw terminal block available from Blue Chip Technology part number ST-24. pins numbered shown following diagram. When connector viewed from back system numbered pins left even numbered pins right with connector.
Detail
View with gold edge connectors downwards.
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Input Connections
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Connections
Input Input Input Input Input Input Input Input Input Input Input Input Input Input Input Input Analogue Analogue Analogue Analogue Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital (Diff. Chan. (Diff. Chan. (Diff. Chan. (Diff. Chan. (Diff. Chan. (Diff. Chan. (Diff. Chan. (Diff. Chan.
Output Output Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital Digital
Note: differential mode pins 1-15 -ve, even pins 2-16 +ve.
USING Analogue Inputs
Four ports used control analogue data collection card: Base Busy Flag (Read) Base Result High Byte (Read) Base Result Byte Automatic Start Conversion (Read) Base Multiplexer Channel Select (Write) typical sequence events acquire data would
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Input Connections
iii.
Write require channel number (0-15) Base Start conversion reading Base (the resultant data discarded). Read Base until goes high indicating conversion. basic other slow languages necessary perform this step conversion only takes microseconds). Read Base high byte result. (This MUST read before byte otherwise another conversion triggered. card automatically puts into bits). Read Base byte result. Combine bits result.
4.1.1
Analogue Input Options
analogue input options follows: iii. Input Mode Single Ended/Differential. Differential Mode Termination. Input Range 0-5, 0-10V.
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Input Connections
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Input Mode
When signals measured have common connection ground which suitable connection computer zero volts, then module used single ended mode provide signal inputs with common connection going digital ground. When signals measured referenced ground will necessary differential input mode. this mode input signals subtracted circuitry board that difference differential signal measured. this mode inputs used pairs that differential input positive connection made pin2 (input negative connection (input pairs. differential mode only input signal (pairs) accommodated. Signal ended differential mode selected links marked card. following link positions should used select required mode. Differential Mode
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Input Connections
Single Ended Mode
Differential Mode Termination
This section only relevant using analogue inputs differential mode. uses solid-state multiplexers. These devices will operate properly either signal voltage input exceeds volts. These limits define common mode voltage range. board differential input option will accept signals which floating with respect computer system ground. these signals must still within common mode voltage range (CMVR) order obtain satisfactory operation. some cases necessary external signals computer ground suitable resistors hold them within CMVR. Failure result erratic readings damage. board provides links (LKE LKD) which used pull input signals towards ground. resistor value generally proves satisfactory, lower values needed electrically noisy environments. many cases external signals related mains ground computer also earthed that signals automatically within CMVR. However, case Amstrad PC1512 computer, there built-in mains earth connection necessary provide order obtain proper performance board. Whether differential signals terminated selected links marked card.
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following link positions should used select required mode. Termination
Termination
Input Range Selection Uni-polar give maximum resolution over 0-5V 0-10V. input range selected link LKC. Uni-polar/bi-polar selection selected card.
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Input Connections
following link positions should used select required mode.
0-5V Input
Uni-polar Selection
+10V Selection
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Input Connections
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0-10V Input
+10V Selection
Input Range Selection Bi-polar
+/-2.5V Input
Bi-polar Selection
2.5V Selection
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Input Connections
Input
+/-10V Input
Selection
4.1.2 Example Program
Selection
following example BASIC reads specified channel from analogue input section ADC. Remember have selected differential mode only have channels available.
FILE NAME-ADRD.BAS DISK INPUT "DECIMAL BASE ADDRESS"; BASE INPUT "CHANNEL (0-15)"; CHAN BASE+12,CHAN A=INP (BASE+2) A=INP (BASE+1) B=INP (BASE+2) RESULT=(A*256)+B PRINT RESULT `Card address `Select channel `Start conversion `Read high byte `Read byte `Combine results `Display value screen
GOTO Page Blue Chip Technology Ltd. 01271014.doc
Input Connections
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Note: 4095 represents full scale. actual value will depend input range selected i.e. Uni-polar 4095 5.11875V (1.25mV/bit) 0-5V Range (4000 10.2375V (2.5mV/bit) 0-10V Range (4000 10V)
4095
Bi-polar 4095 2.5593V (1.25mV/bit) +/-2.5V Range (4000 2.5V) 5.11875V (2.5mV/bit) +/-5V Range (4000 10.2375V (5.0mV/bit) +/-10V Range (4000 10V)
4095
4095
Analogue Outputs
analogue output channels appear following port addresses: Base Update Outputs Strobe Base Analogue Output Byte Load Register Base Analogue Output High Byte Load Register Base Analogue Output Byte Load Register Base Analogue Output High Byte Load Register select appropriate output channel voltage, load byte register with desired value followed high byte, order nibble value. updated strobe must activated write instruction that port address data value.
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Input Connections
card 0-10V output. Thus, volts full scale output 2.5mV bit. e.g. output voltage volts then value 10/2.5mV 4000 decimal required. Thus: byte load value High byte load value 4.2.1 Example Program following program outputs specified value both channels
INPUT "DECIMAL BASE ADDRESS"; BASE INPUT "PLEASE ENTER OUTPUT VALUE (0-4095)"; VALUE (VALUE/256) VALUE-INT (VALUE/256)*256 PRINT VALUE "DECIMAL "HEX$ (VALUE)" HEXADECIMAL" BASE +4,R BASE +5,UP BASE BASE 7,UP BASE GOTO
output voltage linear scale between 0-4095, scaled 2.5mV/bit e.g. output voltage volts value 2000 decimal (07D0 Hex) required.
Programmable Digital
This feature provides programmable digital channels. suitable sensing presence driving connections only. digital appears four ports. first three input output writing suitable code Control Port.
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Input Connections
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These four ports mapped into port follow: Base Programmable Digital Port Base Programmable Digital Port Base Programmable Digital Port Base Control Port typical sequence events this feature would iii. Decide input/output write appropriate code BASE+11. (See 6.3.1). Read from selected input port. Write selected output port. appropriate.
example program using this sequence given next section. Address
Base
DATA (8255 PORT
Base
DATA (8255 PORT
Base
DATA (8255 PORT
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Input Connections
Base
CONTROL
Bits Port (Lower) Port Mode Selection Port (Upper) Port Mode Selection Mode Flag 0=Output, 0=Output, 0=Mode 0=Output, 0=Output, 00=Mode 1X=Mode 0=Inactive, 1=Input. 1=Input. 1=Mode 1=Input. 1=Input. 01=Mode 1=Active.
4.3.1 quick set-up guide. total channel signals connected 8255 device board providing eight ports. Each signal connected within these port i.e.
Ports Decimal
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Input Connections
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Ports
Decimal
4.3.1 Control Code Table following table gives summary most commonly used `control words' which must written control port configure 8255 before using this module. 8255 operate modes (mode 0-2). first mode (mode 8255 provides simple ports. Data simply written read from specified port with handshaking. following Control Code Table assumes mode required. Mode enables transfer data from specified port conjunction with strobes handshaking signals.
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Input Connections
mode data transferred bi-directional port with handshakes (Port
Control Word (Hex) Control Word (Decimal) Sets Port Output Output Output Output Output Output Output Output Input Input Input Input Input Input Input Input Sets Port Output Output Input Input Output Output Input Input Output Output Input Input Output Output Input Input Sets High Bits Port Output Output Output Output Input Input Input Input Output Output Output Output Input Input Input Input Sets Bits Port Output Input Output Input Output Input Output Input Output Input Output Input Output Input Output Input
Table Control Word Table 4.3.2. Example Program following program sets chip with: Port Input Port Output Port Input reads channels whilst outputting channel
INPUT "BASE ADDRESS"; BASE BASE+11,&H99 (BASE+8) BASE+9, (BASE+10) PRINT GOTO
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Interrupts
facilitate generation timed interrupts from ADC, high specification oscillator chip been provided. output this device directly interfaced interrupt system your link LKB. This will allow timer interrupt connected hardware interrupt lines must noted that only these used time. frequency this interrupt vary from minimum 0.0083MHz, minimum 1MHz. select this frequency oscillation, value must written address BASE+13. example this BASIC given following section. 4.4.1 Selecting Interrupt Line Link specified single interrupt channel used ADC. This channel must already other devices. standard interrupt maps IBM-PC, given appendices. select required interrupt simply install link required. example: select interrupt required example program, should shown.
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Input Connections
4.4.2 Programming Interrupt Frequency following code must written BASE+13 select required frequency. Output Frequencies 1MHz Unit Unit:
100K 500K 333.3K 250K 200K 166.6K 8.3K 100K 33.3K 16.6K 8.3K 3.3K 2.5K 1.6K 833.3 333.3 166.6 83.3 33.3 16.6 1.66 0.83 0.33 0.25 1.16 0.083 0.01 0.05 0.033 0.025 0.02 0.016 0.0083
N.B. duty cycle will vary accordingly frequency selected between 50%. Consult manufacturer's data sheet full details. example select 2KHz: Example example select 0.016: Example
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4.4.3 Example Program following example selects interrupt frequency 2KHz.
INPUT "BASE ADDRESS"; BASE BASE+13, STOP
Whilst every effort been taken ensure that information provided accurate, Blue Chip Technology cannot assume responsibility errors this manual their consequences. Should errors detected, company would greatly appreciate being informed them. policy continuos product development operated, resulting design board contents this document being subject change without notice.
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Appendix
APPENDIX
Note: View board with back panel RHS. Address Settings Port 300H
Address Settings Port 200H
Address Settings Port 210H
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Appendix
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Address Settings Port 220H
Address Settings Port 230H
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Appendix
APPENDIX PC/XT/AT Port
Address
Address 000-01F 020-03F 040-05F 060-06F 070-07F 080-09F 0A0-0BF 0F8-0FF 1F0-1F8 200-207 278-27F 2F8-2FF 300-31F 360-36F
Controller 8237A-5 Interrupt Controller 8259A Timer, 8254 Keyboard Controller, 8742; Control Port CMOS RAM, Mask (Write) Page Register (Memory Mapper) Interrupt Controller 8259 Clear (80287) Busy Reset NPX, 80287 Numeric Processor Extension, 80287 Hard Disk Drive Controller Reserved Reserved Parallel Printer Port Reserved Serial Port Reserved Reserved
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Appendix
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Address 378-37F 380-38F 3A0-3AF 3B0-3BF 3C0-3CF 3D0-3DF 3F0-3F7 3F8-3FF
Parallel Printer Port Reserved SDLC Communications, Bisynchronous Reserved Bisynchronous Reserved Reserved Display Controller Diskette Drive Controller Serial Port
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APPENDIX
APPENDIX PC/XT Interrupt
Number Usage Parity Timer Keyboard Reserved Asynchronous Communications (Secondary) SDLC Communications Asynchronous Communications (Primary) SDLC Communications Fixed Disk Diskette Parallel Printer
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APPENDIX
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APPENDIX Interrupt
Level Microprocessor Parity Channel Check Interrupt Controllers CTLR CTLR2 Timer Output Keyboard (Output Buffer Full) Interrupt from CTLR Realtime Clock Interrupt Software Redirected (IRQ Reserved Reserved Reserved Co-processor Fixed Disk Controller Reserved Serial Port Serial Port Parallel Port Diskette Controller Parallel Port Function
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