MSI-NC911 User Manual - Microcomputer Systems, Inc.
Contents
1. Port C is divided into two 4 bit nibbles Port C upper and C lower The I 0 direction of the ports Port A B C upper and C lower can be determined by programming to the control register Programming Examples The following BASIC program configures Port A and B as input port install corresponding RP s if necessary Port C as output port An increasing pattern is sent to Port C It is expected that user will connect both Port A and Port B to Port C before running this program 10 CLS 20 PORT amp H220 REM Base Address 30 OUT PORT 7 amp H92 REM Port A B input Port C output 40 FOR C 0 to 255 REM decimal value form 00 to FF 50 OUT PORT 6 C REM output data to Port C 60 A INP PORT 4 REM read data on Port A B INP PORT 5 REM read data on Port B 80 PRINT A B C REM check data versus Port A and B 90 NEXTC 100 END 25 APPENDIX A PC I O PORT MAPPING I O Port Address Range Function 000 1FF PC reserved 200 20F Game controller Joystick 278 27F Second parallel print port LPT2 2E1 GPIB controller 2F8 2FF Second serial port COM2 320 32F Fixed disk XI 378 37F Primary parallel print port LPT1 380 38F SDLC communication port 3B0 3BF Monochrome adapter printer 3C0 3CF EGA reserved 300 3DF Color graphics adapter 360 3F7 Floppy disk controller 3F8 3FF Primary serial port COM1 26 APPENDIX B BLOCK DIAGRAM 09d Od2. vOd LOd 04d Lad 0VI LVd 110 V 14 dnory 110 V 14 dnory 110 V 14 dnory 110 V 14 dnory O0 101 u09 3dn 1 193u 3130 27 ILNO 0LNO TALVO 0ALVO 9Ppo9I TIO ONTO SS9IPPVY APPENDIX C TECHNICAL REFERENCE General Usage of Digital Input and Output Digital signals are usually used for detecting logical status or controlling devices a brief description is given below TTL level signals are developed by most DAS systems TTL or LSTTL Level I O Connections TTL Devices Connection with COMS Device Use a pull up resistor if you wish to interface to COMS devices This will raise the logic high output level from its minimum TTL level of 2 4 to 5V suitable for COMS interface PULL UP RESISTOR gt gt 28 Digital Input for Open Short Switch Detection A pull up resistor must be connected especially at long distance wiring to ensure logic high input level Digital Output for Relay Driving The D1 diode is added to protect the IC driver against the inductive kickback from the relay coil 29 NC 911 910 Port A B and C Basic Definition 1 Equivalent ckt of port A B and C Pull High Resistor Internal Data Bus 50 Pin Connector PAO PA7 Write Pulse 7418244 PBO PB7 7418273 PCO PC7 Control Port 74LS244 Optional Resistor Pack Not Installed Factory 2 Any port is programmable to input or output
3. 3 Outputs are drived by 74LS244 and latched by 74LS273 4 Inputs are received by 74LS244 but not latched 5 All inputs and outputs are buffered by standard line drives and line receivers 6 The initial state and default setting of port A B and C are tri state 30 APPENDIX D PROGRAMMING 8254 COUNTER TIMER Introduction AXIOM s NC 911 910 module uses INTEL 8254 which consist of three independently programmable 16 bit counters for its timing function Each counter can be programmed to be divided by number within the range of 2 65535 The 8254 is suitable for Event counter Delay time generator Programmable one shot Square wave generator For detailed information user should refer to the 8254 Programmable Interval Timer data sheet Counter Read Write and Control Register There are 4 registers needed to program 8254 Time Counter including three Read Write and one Control register as follows Base 0 through Base 3 Base 0 Counter 0 Read Write register Base 1 Counter 1 Read Write register Base 2 Counter 2 Read Write register Base 3 Control word register Read Write register is used to load divisor to select counter or Read count from selected counter Control register is used to determine counter s operation 31 Control Word Format Addr base 3 D7 D6 D5 D4 D3 D2 Dl DO SC Select Counter M Mode SC1 SCO M2 M1 MO 0 0 Select Counter 0 0 1 Select Counter 1 Select C
4. counting sequence is Triggered by writing the initial count After writing a Control Word and initial count the Counter will be loaded on the next CLK pulse This CLK pulse does not decrement the count so for an initial count of N OUT does not strobe low until N 1 CLK pulses after the initial count is written If a new count is written during counting it will be loaded on the next CLK pulse and counting will counting form the new count If a two byte count is written the following happens Writing the first byte has no effect on counting e Writing the second byte allows the new count to be loaded on the next CLK pulse This allows the sequence to be retriggered by software OUT strobes low M 1 CLK pulses after the new count of N is written Mode 5 Hardware Triggered Strobe Retriggerable OUT will initial be high Counting is triggered by a rising edge of GATE When the initial count has expired OUT will go low for one CLK pulse and then go high again 36 Programming Counter Timer Programming Sequence 1 Writing control word to select counter and determine operation 2 Program selected counter s LSB of R W register 3 Program selected counter s MSB of R W register Addr Base Addr Base Control Word Counter 0 LSB of count Counter 0 MSB of count Counter 0 Control Word Counter 1 LSB of count Counter 1 MSB of count Counter 1 Control Word Counter 2 LSB of count Counter 2
5. go high and remain high until the CLK pulse after the next trigger After writing the Control Word and initial count the Counter is armed A trigger results in loading the Counter and setting OUT low on the next CLK pules thus starting the one shot pulse N CLK cycles in duration The one short pulse can be repeated without rewriting the same count into the counter GATE has no effect on OUT If a new count is written to the Counter during a one short pulse the current one shot is not affected unless the Counter is retriggered In that case the Counter is loaded with the new count and the one shot pulse continues until the new count expires 34 Mode 2 Rate Generator This Mode functions like a divide by N counter It is typically used to generate Real Time Clock interrupt OUT will initial be high When the initial count has decremented to 1 OUT goes low for one CLK pulse OUT the goes high again the Counter reloads the initial count and the process is repeated Mode 2 is periodic the same sequence is repeated indefinitely For an initial count of N the sequence repeats every N CLK cycles After writing a Control Word and initial count the Counter will be loaded on the next CLK pulse OUT goes low N CLK pulses after the initial count is written This allows the Counter to be synchronized by software also Mode 3 Square Wave Mode Mode 3 is typically used for Baud rate generation Mod 3 is similar to Mode 2 except for the duty cycle of
6. i e environment ground is not stable the digital output reset frequently User is suggested to isolate system circuitry from external signal Let the external signal to go through NC 954 24 channel opto isolated D O panel or NC955 8 channel relay output and 16 channel opto isolated D I panel or NC956 24 channel relay output before reaching the system circuitry Hardware Description PC 104 module can be of two bus types 8 bit and 16 bit These correspond to the PC and PC AT buses respectively The detailed mechanical dimensions of these two PC 104 bus types are provided in APPENDIX E PC 104 MECHANICAL SPECIFICATIONS Basically the NC 911 910 belongs to 16 bit bus option which is designed only to by pass PC AT bus signal in order to compatible to PC AT type PC 104 module The NC 911 910 use only IRQ lines on P2 40 pin connector If this module is going to plug onto PC type PC 104 bus do not use IRQ line above 10 Beside bus option there are stack through and non stack through difference The stack through version provides a self stacking PC bus It can be placed any where in a multi module stack The non stack through version offers minimum thickness by omitting bus stack through pins It must be positioned at one end of a stack For convenience the NC 911 910 is equipped with stack through version only NOTE For safety you are suggested to cut bus stack through pins of the last module on condition that you are sure you won t add
7. in below table JP2 JP2 jumper configuration Factory default setting Pin 2 and 4 Connected to Connected to at CN1 connector Ground 12V NC9416 NC9424 NC 954 NC955 CNI compatible NC956 ect Jumpering PC 12V to CN1 connector allows the NC 911 910 to provide 12v power for direct relay driving voltage or input pull high voltage Note that when using the NC 911 910 with standard Opto 22 interface panel board pins 1 and 2 of JP2 jumper must be connected Connector Pin Assignment All NC 911 910 DIO signals are built into a 50 pin connector labeled CNI whose pin assignment are shown below Via this connector the NC 911 910 is compatible with NC 951 NC954 NC754 NC756 accessory board or standard Opto 22 interface panel 5V NAME PIN PIN NAME Ground 5V Ground PAO Ground PA 1 Ground PA 2 Ground PA 3 Ground PA 4 Ground PA 5 Ground PA 6 Ground PA 7 Ground PB 0 Ground PB 1 Ground PB 2 Ground PB 3 Ground PB 4 Ground PB 5 Ground PB 6 Ground PB 7 Ground PC 0 Ground PCI Ground PC 2 Ground PC3 Ground PC 4 Ground PC 5 PC6 PC7 5V PC power supply These pins can be connected to 12V PC power or Ground VO CHANNEL SAINM gt OS MNN Q Se Be ee pudo pd pudo pd UN PPE SPANIA gt by jumpering JP2 Refer to 12V or Ground Selection section WARNING As pin 2 and pin 4 of CNI can be connected to GND or 12V by setting JP2 jumper thus when th
8. plug any module to the module stack in the future Hardware Installation The NC 911 910 PC 104 module is shipped witch protective electrostatic cover When unpacking touching the module electrostatically shielded packaging with the metal frame of your computer to discharge the accumulated static electricity prior to touching the module Following description summarizes the procedures for installing the NC 911 910 WARNING TURN OFF the PC and all accessories connected to the PC whenever installing or removing any peripheral board including the NC 911 910 module Installation procedures 1 2 Turn off the system power Unplug all power cords Remove the case cover if necessary Remove the top module if it a non stackthrough module Put the NC 911 910 module in line with the top present module as described in APPENDIX E PC 104 MECHANICAL SPECIFICATION Install four spacers if necessary Connect cable to CN2 if necessary Crush between the module until inside distance is SPACER height 0 6 Restore all the screws Repeat step 6 until all module are set into position 10 Connect cable CN1 to CN 911 910 if necessary 11 Replace the case cover and connect all the necessary cables 12 Turn on the system power CHAPTER 3 REGISTER STRUCTURE AND FORMAT NC 911 910 I O Address Map This chapter describes each NC 911 910 register in terms of function address bit structure and bit function Each regis
9. Counter 2 Counter 2 Read back count and Count latched for status of Counter 1 Counter 1 but not status Read back status of Command ignored Counter 1 status already latched for Counter 1 33 Counter Operating Mode Mode 0 Interrupt on Terminal Count Mode 0 is typically used for event counting After the Control Word is written OUT is initially low and will remain low until the Counter reaches Zero OUT then goes high and remains high until a new count or a new Mode 0 Control Word is written to the Counter GATE 1 enables counting GATE 0 disables counting GATE has no effect on OUT After the Control Word and initial count are written to a Counter the initial count will be loaded on the next CLK pulse This CLK pulse does not decrement the count so for an initial count of N OUT does not go high until N 1 CLK pulses after the initial count is written If a new count is written to the Counter it will be loaded on the next CLK pulse and counting will continue form the new count If a two byte count is written the following happens Writing the first byte disables counting Out is set low immediately no clock pulse required Writing the second byte allows the new count to be loaded on next CLK pulse Mode 1 Hardware Retriggerable One Shot OUT will be initial high OUT will go low on the CLK pulse following a trigger to begin the one shot pulse and will remain low until the Counter reaches zero OUT will then
10. MSB of count Counter 2 Control Word Counter 2 Control Word Counter 1 Control Word Counter 0 LSB of count Counter 2 MSB of count Counter 2 LSB of count Counter 1 MSB of count Counter 1 LSB of count Counter 0 MSB of count Counter 0 NN Y WS SO Ww SB NN Y Y WW Control Word Counter 0 Control Word Counter 1 Control Word Counter 2 LSB of count Counter 2 LSB of count Counter 1 LSB of count Counter 0 LSB of count Counter 0 MSB of count Counter 1 MSB of count Counter 2 Control Word Counter 1 Control Word Counter 0 LSB of count Counter 1 Control Word Counter 2 LSB of count Counter 0 MSB of count Counter 1 LSB of count Counter 2 MSB of count Counter 0 MSB of count Counter 2 3 3 3 2 1 0 0 1 2 NON SS WH m Yuu OTE In all four examples all counters are programmed to Read Write two byte count is These are only four of many possible programming sequences 37 Simple programming examples written in BASIC are given as follow Example 1 Program counter 0 as rate generator 10 20 30 40 50 60 70 Divisor 100 LSB Divisor MOD 256 MSB Divisor 256 Base amp H220 OUT Base 3 amp H34 OUT Base 0 LSB OUT Base 0 MSB Example 2 Read count of counter o 10 20 30 40 50 Bas amp H220 OUT Base 3 0 LSB inp Base 0 MSB inp Base 0 Count LSB MSB 256 Counter 0 r
11. MSI NC911 3 Ch Counter timer amp 24 Bit DIO Module Copyright IBM is a trademark of International Business Machines Corporation MS DOS MICROSOFT C and Quick BASIC are trademarks of Microsoft Corporation TURBO C is a trademark of Borland Inc BASIC is a trademark of Dartmouth College Intel is a trademark of Intel Corporation CHECK LIST Before getting started check if your NC 911 24 Bit DIO amp 3Ch Counter Timer Module package includes the following items NC 911 board O Screw 3mm x 4 9 Bronze stick 6mm x 4 e NC 911 User s Manual 9 Warranty card If anything is missing please contact your dealer Table of Contents CHAPTER 1 INTRODUCTION i icsccccssscesecsscsssssesvesteasscetonssexesterancseencsosasace 1 General Description se ds 1 APpLICA IOIS siii dala it aa ii cearta 1 W CAGUIES ses daia ala nad aaa pa aaa oaie 2 Specific ti Oris calidad 3 Accessories Guide miei ocazii cani cacao od i calus d aaa dat 5 CHAPTER 2 MODULE CONFIGURATION AND INSTALLATION 6 Component Locator Diagrai ccccsccsccssccssreeccsscsces 6 Base Address Switch scisscesscstccs cossccndscecasasstoadssdescsdsaceadnasssoassse 7 Interrupt Select Jumper sessesssseessssooeessssooessssssecssssoseesesssse 9 12V or Ground Selection ccsssccssssccsscssesscssecsseeeess 10 Connector Pin Assignment seessesssooessoeeesoocsssesesoosesooesssoeeeo 11 Resistor Pack AAA couasacdenccdscesesiesedoctacde
12. OUT OUT will initial be high When half the initial count has expired OUT goes low for the remainder of the count Mode 3 is periodic the sequence above is repeated indefinitely An initial count of N results in a square wave with a period of N CLK cycles After writing a Control Word and initial count the Counter will be loaded on the next CLK pulse This allows the Counter to be synchronized by software also Mode 3 is implemented as follows EVEN COUNTS OUT is initial high The initial count is loaded on one CLK pulse and then is decrement by two on succeeding CLK pulses When the count expires OUT changes value and the Counter is reloaded with the initial count The above process is repeated indefinitely ODD COUNTS OUT is initial high The initial count is loaded on one CLK pulse decremented by one on the next CLK pulse and then decremented by two on succeeding CLK pulses When the count expires OUT goes low and the Counter is reloaded with the initial count The count is decremented by three on the next CLK pulse and then by two on succeeding CLK pulses When the count expires OUT goes high again and the Counter is reloaded with the initial count The above process is repeated indefinitely So for odd counts OUT will be high for N 1 2 counts and low for N 1 2 counts 35 Mode 4 Software Triggered Mode OUT VIII be initial high When the initial count expires OUT will go low for one CLK pulse the go high again The
13. al I O Registers The 24 digital I O lines of NC 911 910 are arranged into one group This group emulates 8255 PPI chip mode 0 and is further divided into three ports Port A Port B and Port C The NC 911 910 is programmable through the configuration registers By writing to control registers the I O direction of each port may be specified If a port is configured as a write output port the data drives will drive the data value to the corresponding port If a port is configured as a read input port the data value on corresponding port will be sent to the digital I O lines Only port C is different from the other two ports that is Port C consists of two 4 bit ports Port C upper and C lower which can separately be configured as input or output port Port A Data Register Base 4 R W base 7 6 5 4 3 2 1 0 4 Port B Data Register Base 5 R W base 7 6 5 4 3 2 1 0 5 Port C Data Register Base 6 R W base 7 6 5 4 3 2 1 0 6 PCO PC3 Port C lower Byte PC4 PC7 POrt C upper Byte 23 Control Register Base 7 W base 7 6 5 4 3 2 1 0 7 LX x X 4 43 xX Di Do Port A Port C upper Port B Port C lower NOTE PAO PA7 PBO PB7and PCO PC7 bits are associated to pins at CNI connector X don t care For D0 D1 D3 D4 1 Input 0 Output 24 CHAPTER 4 PROGAMMING NC 911 910 provides 24 bit digital I O which are divided into three 8 bit ports A B and C
14. ate generator Write low byte to counter o Write high byte to counter o Latch counter o Read low byte from counter o Read high byte from counter o Read count from counter 0 38 APPENDIX E PC 104 MECHANICAL SPECIFICATION PC 104 General Description While the PC and PC AT architectures have become extremely popular in both general purpose desktop and dedicated non desktop applications its use in embedded microcomputer applications has been limited due to the large size of standard PC and PC AT motherboard and expansion cards This document supplies the mechanical and electrical specifications for a compact version of the PC AT bus optimized for the unique requirements of embedded systems applications The specification is herein referred to as PC 104 based on the 104 signal contacts on the two bus connectors 64 pin on L1 plus 40 pins onP2 Module Dimensions PC 104 modules can be of two bus types 8 bit and 16 bit These correspond to the PC and PC AT buses respectively 39
15. devices refer to APPENDIX A for VO port distribution Valid addresses are from 200Hex to 3F8 Hex Following figure is the default setting where the base address is set to 220 Hex To set to appropriate base address switch the individual switches into the ON or OFF position Figure below shows the DIP switch default setting 220 Hex where switches 1 and 5 are moved to the OFF position while leaving all other switches in the ON position A table for DIP switch setting is given in the following page BASE ADDRESS SWITCH SETTING 8 16 32 64 128 256 512 Weighting X Not used Base Address 512 32 544 Decimal 220 Hexadecimal VO PORT DIP SWITCH POSITION RANGE 200 207 208 20F 210 217 218 21F 220 227 300 307 3F0 3F7 3F8 3FF 0 ON 1 OFF X don t care Factory Default Setting Interrupt Select Jumper The NC 911 910 accept external inputs at INTE and INTP pins of CN2 20 pin connector These inputs are lead to any of the six interrupt request lines IRO level 9 2 5 10 11 12 15 by the following jumpers JP1 me 2 gt IRQ92 e e 4 gt IRQS gt 1RQ10 ee gt IRQI ee eae ee gt IRQIS Je 14 No connect In factory jumper JP1 pin13 pin14 is installed on 12V or Ground Selection Pin 2 and pin 4 of CNI 50 pin connector can be set to output PC 12V or Ground by setting jumper JP2 The JP2 configuration is listed
16. e NC 911 910 is connected to other card through this 50 pin connector user must pay attention to the connector pin assignment especially pins 2 and 4 of the corresponding card All input or output lines of NC 911 910 counter timer are built into CN2 20 pin connector The CN2 connector pin assignments are as follows NAME PIN PIN NAME CLKO 12V G0 GND OUTO GND CLKI GND C1 10MHz OUTI GND CLK2 INTP G2 INTE OUT2 GND N C 5V CLKO CLK2 Clock input to 8254 counter 0 through 2 12V 12V PC power G0 G2 Gate control input to 8254 counter 0 through 2 GND Ground OUTO OUT2 Output from 8254 counter 0 through 2 10MHz 10MHz frequency output INTP Interrupt trigger input INTE Interrupt enable input N C No connect 5V 5V PC power Resistor Pack As mentioned before the 8 bit port digital I O lines can be configured as input or output port refer to Chapter 3 Initially the digital I O lines are left floating When any of these ports is set to input port user is suggested to pull high it s input lines by installing RP s Onboard there are 3 reserved spaces marked as RP1 RP3 refer to table below the RP is approximately 4 7k If a port is configured as output lines just leave the corresponding RP unoccupied If CNI is connected to NC9416 and NC9424 the RP should be installed to prevent power on floating phenomenon This floating may cause SSR to action switch on DIO Lines RP NOTE In some situations
17. ncnconcccnococnncnnnoss 37 Module Dimensions _ cccccccccssssscccccsscscccccccccccscccscscosseees 37 CHAPTER 1 INTRODUCTION General Description The NC 911 910 is a PC 104 module which is primary intended to PC embedded application in industrial environment It contains 24 digital input output channels and 3 counter timer channels The 24 bit digital input and output are arranged to emulate 8255 PPI Programmable Peripheral Interface chip mode 0 but with stronger driving capability The 24 bit DIO is further divided into three 8 bit ports Port A Port B and Port C which can be functionally programmed as either digital input or digital output ports There is a unique feather associated with NC 911 910 An external input interrupt ability This feature frees up the PC to do other activities since there is on need to poll the digital input for an event to occur For timing functions the NC 911 910 uses the popular 8254 integrate chip The 8254 has three programmable counters and can be used as event counter rate generator square wave generator frequency measurement etc Applications Sense and control high level signals through I O module Sense low level TTL switches or signals Drive indicator light or control recorders OParallel data transfer to PC Period and pulse width measurement Event and frequency counting Waveform and pulse generation Baud rate generator Features PC 104 standard e
18. ounter 2 1 1 Read Back Command see read operations RW Read Write RW1 RWO Counter Latch Command see BCD Binary Coded read operation Decimal 1 Read Write least significant byte only Read Write most significant 1 Binary Coded byte ecimal BCD 1 1 Read W rite least significant e Decades byte first then most significant NOTE Don t care bits byte X should be 0 to insure compatibility with future products Binary Counter 16 bits 32 Read Back Command The read back command allows the user to check the count value programmed Mode and current state of the OUT pin and Null Count flag of the selected counter s The command is written into the Control Word Register and has the format shown in the preceeding page The command applies to the counter selected by setting their corresponding bits D3 D2 D1 1 pe Addr 3 D7 D6 D5 D4 D3 D2 D1 DO COUT 520 Lo D5 0 Latch count of selected Counters s D4 0 Latch status of selected Counters s D3 1 Select Counter 2 D2 1 Select Counter 1 DI 1 Select Counter 0 DO Reserved for future expansion Must be 0 Here is an example for read back command COMMAND DESCRIPTION RESULT Count and status latched for Counter 0 Read back status of Counter 1 Counter 1 Read back status of Status latched for Counter 2 and 1 Counter 2 but not Counter 1
19. ssgueascdess 13 Hardware Description eee ssosesessseccsssooeessssooseeesssoossssssessssssse 14 Hardware Installation e sseoeoessseccsssoseessssoooesssssoosssssseessssose 14 CHAPTER 3 REGISTER STRUCTURE AND FORMAT 16 NC 911 910 I O Address Map oocconcncononconnnnonnnnconinonnnnincnnconanss 16 8254 Counter Data and Control Registers csseeeees 17 Digital I O Registers cisco e ata 20 CHAPTER 4 PROGRAMMING oomcccccnnccconoccconnccccnnccconnccocnnccononocononononoconass 22 Programming Examples essssesssecccssooeecsssooesesssocsssssssesssssose 22 APPENDIX A PC I 0 PORT MAPPING eoomccccncccoconcosnnnconinccocnnccconncconacono 23 APPENDIX B BLOCK DIAGRAM sesssesssecssoossooesssesssesssocssoossosessossssesssosee 24 APPENDIX C TECHNICAL REFERENCE esseesssesssesssesssoossoosssossssssssese 25 General Usage of Digital Input and Output 25 NC 911 910 Port A B and C Basic Definition 27 APPENDIX D PROGRAMMING 8254 COUNTER TIMER 28 Introduction ita 28 Counter Read Write and Control Register 28 Read Back Command scccscsccceccascsesconsssssesseonsncessvostesseseseaensesse 30 Counter Operating Mode 55 5555555555555956555566655555669 32 Programming Counter Timer ooccccoconccnononnnnonnnocnononannonococono 35 APPENDIX E PC 104 MECHANICAL SPECIFICATION 37 PC 104 General Description oocoooonncncconoonn
20. ter is easy to read and write to by using direct 1 O instructions of whatever application languages NC 911 910 uses 8 consecutive addresses in I O space as follows R Read W Write Location Function Type Base address 0 Counter 0 R W 1 Counter 1 R W 2 Counter 2 R W 3 Control Word W 4 Port A R W 5 Port B R W 6 Port C R W 7 Control Register W 20 8254 Counter Date and Control Registers Counter 0 Data Register Base 0 R W base 7 6 5 4 3 2 1 0 0 B7 Bo BS B4 B3 B2 B1 80 _ Counter 1 Data Register Base 1 R W base 7 6 5 4 3 2 1 0 _B7 B6 BS B4 B3 B2 Bi BO Counter 2 Data Register Base 2 R W base 7 6 5 4 3 2 1 0 2 B7 B6 BS B4 B3 B2 Bi BO Counter Word Register Base 3 VV base 7 6 5 4 3 2 1 0 3 21 Where SC Counter 0 SeleetCountero 0 1 SeleetCounteri 1 O SelectCounter2 Where RW Read Write RW1 RWO Description 0 0 Counter latch command 1 R W LSB onl 1 M2 MI MO Description 0 0 0 Mode 0 Pulse on terminal count 1 Mode 1 Programmable one shot 0 Mode 2 Rate generator Description Binary counter 16 bit Binary coded decimal BCD counter 4 decodes NOTE This module uses 8254 integrate chip for its programmable counter timer channels Refer to APPENDIX D PROGRAMMING 8254 COUNTER TIMER or the 8254 Data Book for detailed information 22 Digit
21. trigger 200mA typ 50 pin male ribbon connector 20 pin male ribbon connector Ribbon stripline cable Zo 30 Q to 80 Q 95mm 90mm 200g 0 to 60 C 40 to 100 C 0 to 90 non condensing Accessories Guide NC 951 Screw terminal board for all digital I O connections Shipped with 3 3 feet 1 meter cable and 50 pin connector NC 954 24 channel opto isolated D I panel for signal connection and conditioning with the NC 911 910 Shipped with 3 3 feet 1 meter cable and 50 pin connector NC 955 8 channel electromechanical single pole double throw SPDT and 16 channel opto isolated digital I P panel which is compatible with the NC 911 910 Shipped with 3 3 feet 1meter cable and 50 pin connector NC 956 24 channel electromechanical single pole double throw SPDT which can be driven by the NC 911 910 Shipped with 3 3 feet 1 meter cable and 50 pin connector CHAPTER 2 MODULE CONFIGURATION AND INSTALLATION Component Locator Diagram The following figure shows the location of NC 911 910 s component All switch and jumper settings in this figure are factory default setting N ooo00o00 00000 D 0000000000 CN2 D M5M8SC54P L Base Address Switch NC 911 910 occupies eight consecutive I O port spaces The I O port addresses are set via a DIP switch labeled SW1 Set the DIP switch to correct address and avoid conflicting with other
22. xpansion module 24 TTL DTL digital VO lines 24mA output drive sink current Easy interface to high level signals Three 8 bit ports independently selectable for I O 3 programmable counter timer channels Include timed interrupt generation 50 pin digital connector compatible with NC 951 NC 954 NC 955 or NC956 accessory board Specifications Digital VO Number of Channels 1 O Configuration Operation Mode Input Output Mode Improved Noise Margins Added Pull up Resistor Digital Input Logic High Input Voltage Logic Low Input Voltage Logic High Input Current Logic Low Input Current Digital Output Logic High Output Voltage Logic Low Output Voltage Logic High Output Current Logic Low Output Current Programmable Counter Timer Type Number of Counters Frequency Range Modes Input Output Level 24 TTL DTL compatible Emulates 8255 mode 0 Pair Hysteresis Vrt Vr E 0 4 typ CMOS dry contact compatible 2V min 0 8V max 20uA max at V 2 7V 0 2mA max at V 0 4V 2 4V min at lon 3mA 0 4V max at lo 12mA 15mA source max 24mA sink max 82C54 3 independent 16 bit counters DC to 10MHz 6 programmable mode TTL DTL CMOS compatible Interrupt PC bus IRQ Source Power Requirement 5V Physical Environmental I O Connector VO Cable Type Dimensions Weight Operating Temperature Storage Temperature Humidity 9 2 5 10 11 12 15 Enable control and positive
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