ISA-PIO User Guide - Blue Chip Technology
Contents
1. b 8088 8086 Assembly language PORT EQU 0300H GETDAT MOV DX PORT IN AL DX RET Blue Chip Technology Ltd 01270181 doc Page 13 Page 14 Operating Guide The state of the output lines may be modified by using either of the following methods a Microsoft BASIC A or GW BASIC OUTP D Outputs the byte D to port P b 8088 8086 Assembly language PORT EQU 0300H PUTDAT MOV DX PORT MOV AX DATA OUT DX AL RET Page 14 01270181 doc Blue Chip Technology Ltd Operating Guide Page 15 The following table gives a summary of the most commonly used control words which must be written 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 VO for 3 8 bit ports Data is simply written to or read from a specified port A B or C without the use of handshaking The following Control Code Table 3 assumes mode 0 is reguired Mode 1 enables the transfer of data to or from a specified 8 bit port A or B in conjunction with strobes or handshaking signals In mode 2 data is transferred via one bi directional 8 bit port A with handshakes Port C Control Control Sets All Sets All Sets High Sets Low Word Word of of 4 Bits of 4 Bits of Hex Decimal Port A To Port B To Port C To Port C To 80 128 Output Output Output Output 89 137 Oupt Output Input imut 90 12. Figure 1 Selecting the Base Address sss aaa 6 2 2 Port Map ceo aa 7 3 0 ELECTRICAL OPTIONS a aaa 9 3 1 Input conditioning di sm wid 3 2 Input Output Connections aaa 9 Pin Delai uu l sa andris ar diuini iius 10 3 3 Connector Pin Details sss aaa 11 40 OPERATING GUIDE zu Ein Leere cs 12 43 Usingthe Device 12 4 2 Programming Guide iets aaa 13 4 3 Example Program avansa d das 16 5 0 COMMERCIAL DATA ACQUISITION PACKAGES 17 5 1 Use of the ISA PIO Board with ASYST sss 17 Blue Chip Technology Ltd 01270181 doc Contents APPENDIX Nx E 18 APPENDIX B Asesinas aaah Qawaman p ru 20 PCIXTIAT Port Map a aaa 20 I O Address Map aaa aaa 20 rdc BPO 21 PC XT Interrupt Map uu mene 21 APPENDIX sections i simas aria 22 AT Interrupt Map as aaa 22 ARPENBIXF cija ads Sas 23 Application Notes for Interfacing the ISA PIO 23 Glossary ANS SN 25 01270181 doc Blue Chip Technology Ltd Outline Description Page 1 OUTLINE DESCRIPTION This card provides 48 programmable digital I O channels It is suitable for sensing the presence of or driving connections only There i provim for a set of on board pull up resistors to enable the board to be used to detect contact closures on push buttons relay contacts etc Blue Chip T
3. Ltd APPENDIX C Appendix C PC XT Interrupt Map Number Usage NMI Parity pT Oo jim Secondary SDLC Communications Pim 1 SDLC Communications 6 Diskette Blue Chip Technology Ltd 01270181 doc Page 21 Page 21 Page 22 APPENDIX D AT Interrupt Map Level Microprocessor NMI Interrupt Controllers CTLR 1 CTLR2 IRQ 0 IRQ 1 IRQ2 IRQ8 IRQ 9 IRQ 10 IRQ 11 IRQ 12 IRQ 13 IRQ 14 IRQ 15 IRQ 3 IRQ4 IRQ5 IRQ6 IRQ7 Page 22 Appendix D Function Parity or I O Channel Check Timer Output 0 Keyboard Output Buffer Full Interrupt from CILR 2 Realtime Clock Interrupt Software Redirected to INTOAH IRQ2 Reserved Reserved Reserved Coprocessor Fixed D isk Controller Reserved Serial Port 2 Serial Port 1 Parallel Port 2 Diskette Controller Parallel Port 1 01270181 doc Blue Chip Technology Ltd Appendix F Page 23 APPENDIX F Application Notes for Interfacing the ISA PIO The signals present at ports A B amp C on either the NMOS or CMOS 8255 are TTL Transistor Transistors Logic compatible that is they will interface into standard 74LS logic However TTL has limitations when interfacing to other circuitry The following should be considered when attempting to interface the ISA PIO 1 ISA PIO cannot drive high capacitances 2 ISA PIO cannot sink loads greater than 2 5mA and retain an output voltage that is TTL compatible 3
4. doc Blue Chip Technology Ltd 3 3 Electrical Options Connector Pin Details Pot Bit Pin Pin Bit Pot A 0 fio o2 o JA pe 30 od fji 12 5o o6 2 13 70 o8 3 14 90 ot0 4 l5 nofo m le Bo ota 6 l7 l5o o6 7 Port Bit Pin Pin Bit Port B 0 Jio o o p 1 t90o oz 1 2 Bor 622 2 3 Paso oz 4 fso oz 4 s ze ez s s zs es 6 Pr so bose l7 T Pot pt Pin Pim Bit Port C o 13o o3 o C 1 so os 2 30 Jose 2 13 39o o4 3 4 4o o2 4 5 43o od 5 16 so os 6 us os Y j Digital Ground 490 0 Digital Ground Blue Chip Technology Ltd 01270181 doc Page 11 Page 11 Page 12 Operating Gu ide 4 0 OPERATING GUIDE 4 1 Using the Device A total of 24 I O channel signals may be connected to each of the 8255 I O devices on the ISA PIO board providing 6 eight bit ports Each signal is connected to one bit within one of these ports i e Port Hex Decimal Port Add Add Lad l0 J 7 i Page 12 01270181 doc Blue Chip Technology Ltd Operating Guide Page 13 4 2 Programming Guide The state of the input lines may be determined by using either of the following methods a Microsoft BASIC A or GW BASIC X INP P Returns the byte from port P and assigns this value to the variable X
5. 44 ipt Output Output Output 98 182 ipt Output Input Output 99 153 nut Output Input imut LIB 155 lt jinpt input I input Table 3 Control Word Table Blue Chip Technology Ltd 01270181 doc Page 15 Page 16 Operating Guide 4 3 Example Program The following program in Microsoft Basic will test the operation of the ISA PIO if a link is made between corresponding pins on the rear connector 10 P1 8H300 REM BASE OF FIRST PIA 15 P2 8H304 REM BASE OF SECOND PIA 20 GOSUB 60 30 P1 amp H304 P2 amp H300 40 GOSUB 60 50 GOTO 10 REM LOOP CONTINUOSLY 60 OUT P1 3 amp H80 OUT P2 3 amp H9B 70 FORP 0TO2 80 F 0 90 A 1 100 OUTP1 P A 110 IF INP P2 P lt gt ATHENPRINT ERROR P A INP P2 P F F 1 120 A AtA 130 IF A 256 THEN GOTO 150 140 GOTO 100 150 IF F gt 0THENPRINTP FAILED F GOTO 0 160 PRINTP PASSED 170 NEXT P 180 RETURN The above program runs continuously and can only be stopped by pressing control and break on the PC keyboard Page 16 01270181 doc Blue Chip Technology Ltd Commercial Data Acquisition Packages Page 17 5 0 COMMERCIAL DATA ACQUISITION PACKAGES The Blue Chip Technology ISA PIO can be used with almost any data acquisition package that can read information directly from a PC input port 5 1 Use of the ISA PIO Board with ASYST The board has been tested with and is installable as an 8255 PORT digital devi
6. ISA PIO 48 Channel TTLDigital VO Board Blue Chip W Zechnology User Manual ISA PIO User Manual Document Part No 0127 0181 Docunent Reference ISA PIO 0127 0181 Doc Document Issue Level 0 8 Manual covers PCBs identified ISA PIO Rev B All rights reserved No part of this publication may be reproduced stored in any retrieval system or transmitted in any form or by any means electronic mechanical 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 at the time of printing Blue Chip Technology accepts no responsibility for any inaccuracies This information is subject to change without notice All trademarks and registered names acknowledged Blue Chip Technology Lid Chowley Oak Tattenhall Chester Cheshire CH3 9EX Telephone 01829 772000 Facsimile 01829 772001 Amendment History Issue Issue Amendment Details Level Date 05 05 89 08 210797 Window front cover and new logo Contents OUTLINE DESCRIPTION al 1 0 SPECIFICATION lt ire cmm edens cerrada 2 1 1 Electrical Specification o sse 2 1 2 Physical Specification sse 2 Electromagnetic Compatibility EMC sm 3 EMC Specification hens 4 2 0 USERADJUSTMENTS irate aiia 5 2 1 Selecting the Base Address sss 5
7. ISA PIO cannot source loads greater than 200uA 400uA for CMOS version and retain an output voltage that is TTL compatible 4 ISA PIO cannot interface to any voltage greater than VCC VDD 0 5 or lower than 0 5V 5 ISA PIO cannot drive long lengths of cable into other TTL compatible devices TTL is a standard for onboard interfacing primarily and is too susceptible to interference and noise to be used with long cable runs General TTL requirement PLOW HIGH _ C Input 0 5 0 8V 2 0 Vcc VDD Output 0 0 45V 24 Vcc VDD Blue Chip Technology Ltd 01270181 doc Page 23 Page 24 Appendix F Characteristics DC PARAMETER SYMBOL 8255 82C55 MIN MAX MIN MAX LIMITS LIMITS 35 IOH 4000A Supply Curent Dynamic IDDI 120968 SMA Page 24 01270181 doc Blue Chip Technology Ltd Glossary Page 25 Glossary VIH High level input voltage the minimum and maximum voltages that can be applied ref to OV for a high to be recognised VIL Low level input voltage the minimum and maximum voltages that can be applied ref to OV for a low to be recognised VOH High level output voltage the minimum that will be presented at the output as a high at a given max current source current VOL Low level output voltage the maximum voltage that will be presented at the output as a low at a given maximum current load Blue Chip Technology Ltd 01270181 doc Page 25 LI ss c Rv LOGO saja owava
8. Inactive See Table 3 for quick set up guide Page 8 01270181 doc 1 Input 1 Input 1 Mode 1 1 Input 1 Input 01 Mode 1 1 Active Blue Chip Technology Ltd Electrical Options Page 9 3 0 ELECTRICAL OPTIONS 3 1 Input conditioning The 8255 has high impedance inputs An option is provided to terminate external input lines This is useful in an electrically noisy environment or where a load is required e g open collector drive The termination may be pull up to 5V or pull down to OV via 6 SIL resistor packs RP 2 7 Links B G select pull up or pull down See circuit diagram 3 2 Input Output Connections A 50 way insulation displacement connector IDC is provided on the PC rear panel of the board for I O channel signal connection If access to individual channels is required a 50 way IDC ribbon cable may be used to connect the VO 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 Pins 1 48 contain the I O channels and pins 49 and 50 are connected to digital ground When the connector is viewed from the back of the system odd numbered pins are on the left and even numbered pins are on the right with pin 1 at the top of the connector Blue Chip Technology Ltd 01270181 doc Page 9 Page 10 Electrical Options Pin Detail View with gold edge connectors downwards Page 10 01270181
9. c 1310 66 uve wore ele dell sl 5 EEE Fa wc avo oaov wo sive aaow wc sivo aaa f 50 8 A34 8vOld TINON LNdLNO LAANI om 3l8vWWviSONd TANNVHO 8p guu s90 cv anvos 100Z 62810 XW4 0002 4 6Z810 73i X36 CHO 3 HS3HO H3LS3HO TIVHNSLLVI VO ATMOHO yayuno 01 OJ YOA N GALINIT ADO IONHOYL dIHO ANTA z ON 30551 0N 30551 ON 3nssi ON 3nssi 0N 30551 69 11 Ov at 4 a dts ASH la 22 v iv 0 Look sne R 9 r7 6z8 ec ats AEH 1d Nun Ap ET au I Ud d necs Y z ai 8 AG 0 na B7 ids 37 na vt dl 55 10 T HE ki dv ES GG 0Z at L PEK DE es C oso Fe SF PEZ AIC RET 7 a la t g d 5 5 5 9 18 t ad tV ts Ndi 8 dl 9 at dts T TTT TTT a
10. ceinthe ASYST scientific software package by Macmillan Software Company For more details about this package and other PC data acquisition software please contact Blue Chip Technology Whilst every effort has been taken to ensure that the information provided is accurate Blue Chip Technology cannot assume responsibility for any error in this manual or their consequences Should any errors be detected the company would greatly appreciate being informed of them A policy of continuous product development is operated resulting in the contents of this document being subject to change without notice Blue Chip Technology Ltd 01270181 doc Page 17 Page 18 Appendix A APPENDIX A Note View board with back panel on RHS Address Settings for Port 30011 Beleg oo 10 20 40 80 100 200 Address Settings for Port 200H dioela 10 20 40 80 100 200 Address Settings for Port 208H o fated w 10 20 40 80 100 200 Page 18 01270181 doc Blue Chip Technology Ltd Appendix A Page 19 Address Settings for Port 210H 7 88 10 20 40 80 100 200 Address Settings for Port 220H ojo 10 20 40 80 100 0 Address Settings for Port 23011 O O O 8 10 20 40 80 100 200 Blue Chip Technology Ltd 01270181 doc Page 19 Page 20 Appendix B APPENDIX B PC XT AT Port Map I O Address Map Address I 380 38F Reserved for SDLC Communications Berens Page 20 01270181 doc Blue Chip Technology
11. echnology Ltd 01270181 doc Page 1 Page 2 Specification 1 0 SPECIFICATIONS 1 1 Electrical Specification Number of channels I O Logic Levels ON 24Vto5V TTL Level Maximum I O Voltage SV i SV o 12 Physical Specification Height Width Depth Page 2 01270181 doc Blue Chip Technology Ltd Electromagnetic Compatibility EMC Page 3 Electromagnetic Compatibility EMC This product meets the requirements of the European EMC Directive 89 336 EEC and is eligible to bear the CE mark It has been assessed operating in a Blue Chip Technology Icon industrial PC However because the board can be installed in a variety of computers certain conditions have to be applied to ensure that the compatibility is maintained It meets the requirements for an industrial environment Class A product subject to those conditions e The board must be installed in a computer system which provides screening suitable for the industrial environment e Any recommendations made by the computer system manufacturer supplier must be complied with regarding earthing and the installation of boards e 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 e Most EMC problems are caused by the external cabling to the board Boards fitted with IDC ribbon cable connectors on the metal mounting bracket require particularly careful installation of the ex
12. pattern on the links as indicated below Blue Chip Technology Ltd 01270181 doc Page 5 Page 6 User Adjustments Figure 1 Selecting the Base Address Note View board with back panel on RHS Middle 7 bits of port address on links oo 20 40 80 100 200 More example addresses are shown in Appendix A Note No two cards must occupy the same address Page 6 01270181 doc Blue Chip Technology Ltd 2 2 Port Map User Adjustments Page 7 The ISA PIO has two 8255 chips Each chip has three 8 bit ports which can be programmed as input or output by writing a control word to the control port See Table 3 Port A and B A and B must be all input or all output Port C may be split into two 4 bit sections each of which may be input or output The board occupies eight read write addresses four for each 8255 chip in the IBM PC port map Address Base 0 Base 1 Base 2 Base 3 Base 4 Base 5 Base 6 Base 7 Blue Chip Technology Ltd Port A Port B 8255 N 1 Port C Command Port Port A Port B 8255N 2 Port C Command Port DATA 8255 PORT A 01270181 doc Page 7 Page 8 User Adjustments DATA 8255 PORT B DATA 8255 PORT C CONTROL Bit 0 Port C Lower 0 Output Bit 1 Port B 0 Output Bit 2 Mode Selection 0 Mode 0 Bit 3 Port C Upper 0 Output Bit 4 Port A 0 Output Bits 5 6 Mode Selection 00 Mode 0 1X Mode 2 Bit 7 Mode Set Flag 0
13. sions EN 55022 1995 Radiated Class A Conducted Class A amp B Immunity pr EN 50082 2 1991 incorporating Electrostatic Discharge TEC 801 2 1984 Performance Criteria A Radio Frequency Susceptibility TEC 801 3 1984 Performance Criteria A Fast Burst Transients IEC 801 4 1988 Performance Criteria A Page 4 01270181 doc Blue Chip Technology Ltd User Adjustments Page 5 2 0 USER ADJUSTMENTS 2 1 Selecting the Base Address The board may be located in any 62 pin slot in the PC motherboard but must be set up to appear at a specified position or address in the port map Available positions are shown in the IBM PC Technical Reference Guide However for those who do not possess a copy of this document a good place is the location normally allocated to the prototyping card as supplied by IBM This address is 300 Hex or 768 decimal All Blue Chip Technology cards are preset to this address at the factory 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 another reasonably safe address is 200 to 21F Hex A set of links is provided on the board to set the base address of the board within the IBM PC port map The address is in binary with the presence of a link representing a 0 and the absence of a link representing a 1 To set the base address to 768 Decimal 300 Hex set the following
14. ternal cabling The cabling must be totally screened the type of ribbon cable which is rolled to a round form with a braided wire screen is best Standard ribbon cable will not be adequate unless it is contained wholly within the cabinetry housing the industrial PC Keep the unscreened section as short as possible The mounting bracket of the board includes a captive nut as an screen earth point Connect the screen of the cable to this by the shortest possible wire e To ensure that the board meets the industrial radiated field immunity of 10V metre the cable should also be fitted with a ferrite clamp on the external cable as close as possible to the connector The preferred type is the Chomerics clip on style type H8FE 1004 AS Blue Chip Technology Ltd 01270181 doc Page 3 Page 4 Electromagnetic Compatibility EMC e Ensure that the screen of the ribbon cable is bonded to a good RF earth at the remote end of the cable e Cables which connect externally to boards at TTL levels should not exceed two metres in length This restriction does not apply to opto isolated boards Failure to observe these recommendations may invalidate the EMC compliance This is a Class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures EMC Specification A Blue Chip Technology Icon industrial PC fitted with this card meets the following specification Emis
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