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ADC-42

Digital and Analogue

Input/Output Module

User Manual

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Summary of Contents for ADC-42

Page 1: ...ADC 42 Digital and Analogue Input Output Module User Manual...

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Page 3: ...anical photocopied recorded or otherwise without the prior permission in writing from the publisher For permission in the UK contact Blue Chip Technology Information offered in this manual is correct...

Page 4: ...Amendment History Issue Level Issue Date Author Amendment Details 0 3 10 1 92 I S First issue 1 0 SEJ Window front cover and logo See ECN 98 087...

Page 5: ...USTMENTS 4 2 1 Selecting the Base Address 4 2 2 Port Map 5 3 0 INPUT CONNECTIONS 6 Pin Detail 6 3 1 Pin Connections 7 4 0 USING THE ADC 7 4 1 Analogue Inputs 7 4 1 1 Analogue Input Options 8 4 1 2 Exa...

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Page 7: ...ersatile 12 bit input and output subsystem having both analogue and digital capability The card can provide 1 24 Digital inputs or outputs 2 2 Channels of analogue output 3 16 Channels of single ended...

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Page 9: ...Ranges bi polar 2 5V 5V 10V Link Selectable Maximum Input Voltage 12V ii Analogue Output Number of Channels 2 Resolution 12 Bit Output Range 0 10V Maximum Load Current 5mA DC iii Programmable Digital...

Page 10: ...earthing and the installation of boards The board must be installed with the backplate securely screwed to the chassis of the computer to ensure good metal to metal i e earth contact Most EMC problems...

Page 11: ...e end of the cable Failure to observe these recommendations may invalidate the EMC compliance Warning This is a Class A product In a domestic environment this product may cause radio interference in w...

Page 12: ...actory However no two devices should be used while set to the same address since contention will occur and neither board will work If your machine contains a card with a conflicting address then anoth...

Page 13: ...ns of the ports are shown below Base 0 ADC Bit 7 Busy Flag Read Base 1 ADC Result High Byte Read Base 2 ADC Result Low Byte Read and Start Conversion Read Base 3 DAC Update Output Write Base 4 DAC A L...

Page 14: ...C ribbon cable may be used to connect the I O channels to a 50 way screw terminal block available from Blue Chip Technology as part number ST 24 The pins are numbered as shown in the following diagram...

Page 15: ...igital I O A4 29 30 Digital I O A5 Digital I O A6 31 32 Digital I O A7 Digital I O B0 33 34 Digital I O B1 Digital I O B2 35 36 Digital I O B3 Digital I O B4 37 38 Digital I O B5 Digital I O B6 39 40...

Page 16: ...to perform this step as conversion only takes 10 microseconds iv Read Base 1 for the 4 MSB of the high byte result This MUST be read before the low byte otherwise another conversion is triggered The...

Page 17: ...ry to use the differential input mode In this mode the input signals are subtracted by the circuitry on the board so that the difference or differential signal is measured In this mode inputs are used...

Page 18: ...n In some cases it may be necessary to tie external signals to the computer ground via suitable resistors to hold them within CMVR Failure to do so may result in erratic readings or damage The board p...

Page 19: ...be used to select the required mode For Termination LKD LKE a b a b For No Termination LKD LKE a b a b c Input Range Selection Uni polar The ADC can be set to give maximum resolution over 0 5V or 0 1...

Page 20: ...Input Connections Page 12 Blue Chip Technology Ltd 01271014 doc The following link positions should be used to select the required mode LKF B U Uni polar Selection For 0 5V Input LKC 2 5 10 5 10V Sel...

Page 21: ...nections Page 13 Blue Chip Technology Ltd 01271014 doc Page 13 For 0 10V Input LKC 2 5 10 5 10V Selection iv Input Range Selection Bi polar LKF B Bi polar Selection U For 2 5V Input LKC 2 5V Selection...

Page 22: ...analogue input section of the ADC Remember if you have selected differential mode you only have channels 0 7 available FILE NAME ADRD BAS ON DISK 10 INPUT DECIMAL BASE ADDRESS BASE Card address 20 IN...

Page 23: ...V Range 4000 10V 4 2 Analogue Outputs The 2 analogue output channels appear at the following port addresses Base 3 Update Outputs Strobe A and B Base 4 Analogue Output A Low Byte Load Register Base 5...

Page 24: ...E 0 4095 VALUE 30 UP INT VALUE 256 40 R VALUE INT VALUE 256 256 50 PRINT VALUE DECIMAL IS HEX VALUE HEXADECIMAL 60 OUT BASE 4 R 70 OUT BASE 5 UP 80 OUT BASE 6 R 90 OUT BASE 7 UP 100 OUT BASE 3 0 120 G...

Page 25: ...Base 11 Control Port A typical sequence of events to use this feature would be i Decide on the input output mix and write the appropriate code to BASE 11 See 6 3 1 ii Read from the selected input port...

Page 26: ...1 Input Bits 5 6 Mode Selection 00 Mode 0 01 Mode 1 1X Mode 2 Bit 7 Mode Set Flag 0 Inactive 1 Active See 4 3 1 for quick set up guide A total of 24 I O channel signals may be connected to the 8255 I...

Page 27: ...ten to the control port to configure the 8255 before using this module The 8255 can operate in one of 3 modes mode 0 2 In the first mode mode 0 the 8255 provides simple I O for 3 8 bit ports Data is s...

Page 28: ...137 Output Output Input Input 8A 138 Output Input Input Output 8B 139 Output Input Input Input 90 144 Input Output Output Output 91 145 Input Output Output Input 92 146 Input Input Output Output 93 14...

Page 29: ...one time The frequency of this interrupt may vary from minimum of 0 0083MHz to a minimum of 1MHz To select this frequency of oscillation a six bit value must be written to address BASE 13 An example o...

Page 30: ...1 0 1 0 500K 50K 5K 500 50 5 0 5 0 05 0 1 1 333 3K 33 3K 3 3K 333 3 33 3 3 3 0 33 0 033 1 0 0 250K 25K 2 5K 250 25 2 5 0 25 0 025 1 0 1 200K 20K 2K 200 20 2 0 2 0 02 1 1 0 166 6K 16 6K 1 6K 166 6 16 6...

Page 31: ...ort has been taken to ensure that the information provided is accurate Blue Chip Technology cannot assume responsibility for any errors in this manual or their consequences Should any errors be detect...

Page 32: ...y Ltd 01271014 doc APPENDIX A Note View board with back panel on RHS Address Settings for Port 300H 40 10 20 LSB 200 80 100 MSB Address Settings for Port 200H 40 10 20 LSB 200 80 100 MSB Address Setti...

Page 33: ...Appendix A Page 25 Blue Chip Technology Ltd 01271014 doc Page 25 Address Settings for Port 220H 40 10 20 LSB 200 80 100 MSB Address Settings for Port 230H 40 10 20 LSB 200 80 100 MSB...

Page 34: ...eyboard Controller 8742 Control Port B 070 07F RTC and CMOS RAM NMI Mask Write 080 09F DMA Page Register Memory Mapper 0A0 0BF Interrupt Controller 2 8259 0F0 Clear NPX 80287 Busy 0F1 Reset NPX 80287...

Page 35: ...age 27 Address 378 37F Parallel Printer Port 1 380 38F Reserved for SDLC Communications Bisynchronous 2 3A0 3AF Reserved for Bisynchronous 1 3B0 3BF Reserved 3C0 3CF Reserved 3D0 3DF Display Controlle...

Page 36: ...71014 doc APPENDIX C PC XT Interrupt Map Number Usage NMI Parity 0 Timer 1 Keyboard 2 Reserved 3 Asynchronous Communications Secondary SDLC Communications 4 Asynchronous Communications Primary SDLC Co...

Page 37: ...TLR2 IRQ 0 Timer Output 0 IRQ 1 Keyboard Output Buffer Full IRQ 2 Interrupt from CTLR 2 IRQ 8 Realtime Clock Interrupt IRQ 9 Software Redirected to INT 0AH IRQ 2 IRQ 10 Reserved IRQ 11 Reserved IRQ 12...

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