PCI-DIO-48S User Manual - ACCES I/O Products, Inc.
Contents
1. outportb BASE_ADDRESS 0 outportb BASE ADDRESS 11 0 These instructions set the initial state of ports A and B to all zeroes Port C is not set because it is configured as an input See item c above outportb BASE ADDRESS 3 0x09 Enable the tristate output buffers by using the same control byte used to configure the PPI but now set bit D7 low See item d above Programming Example BASIC The following example in BASIC is provided as a guide to assist you in developing your working software In this example the card base address is 2D0 hex and the I O lines of group 0 are to be setup as follows Port A Input Port B Output Port C Hi Input Port C Lo Output The first step is to configure the control register Configure bits of the control register as D7 1 Active Mode Set D6 0 Mode O D5 0 Mode O D4 1 Port A Input D3 1 Port C Hi Input D2 0 Mode 0 D1 0 Port B Output DO 0 Port C Lo Output This corresponds to 98 hex If the card address is 2D0 hex use the BASIC OUT command to write to the control register as follows 10 BASEADDR amp H2D0 20 OUT BASEADDR 3 amp H98 To read the inputs at Port A and the upper nybble of Port C 30 X INP BASEADDR Read Port A 40 Y INP BASEADDR 2 16 Read Port C Hi 19 Manual PCI DIO 48 S To set outputs high 1 at Port B and the lower nybble of Port C 50 OUT BASEADDR 1 amp HFF Turn o2. U gt D This line is an I O port and also a User Interrupt Table 7 1 Connector Pin Assignments 22 Manual PCI DIO 48 S Customer Comments If you experience any problems with this manual or just want to give us some feedback please email us at manuals accesio com Please detail any errors you find and include your mailing address so that we can send you any manual updates ACCESS I O PRODUCTS INC 10623 Roselle Street San Diego CA 92121 Tel 858 550 9559 FAX 858 550 7322 www accesio com 23 Manual PCI DIO 48 S
3. Mode 0 01 Mode 1 1x Mode 2 Table 6 2 Control Register Bit Assignment Note Mode 1 cannot be used by these cards without modification Thus bits D2 D5 and D6 should always be set to 0 If your card has been modified to operate in Mode 1 then there will be an Addendum page in the front of this manual These cards cannot be used in Mode 2 of the PPI Note In Mode 0 do not use the control register byte for the individual bit control feature The hardware uses the I O bits to control buffer direction on this card The control register should only be used for setting up input and output of the ports and enabling the buffer These cards provide a means to enable disable the tristate I O buffers under program control If the TST BEN jumper on the card is installed in the BEN position the I O buffers are permanently enabled However if that jumper is in the TST position enable disable of the buffers is software controlled via the control register as follows a The card is initialized in the receive mode by the computer reset command b When bit D7 of the Control Register is set high direction of the three groups of the associated PPI chip as well as the mode can be set For example a write to Base Address 3 with data bit D7 high programs port direction at Group 0 ports A B and C If for example hex 80 is sent to Base Address 3 the Port 0 PPI will be configured in mode 0 with Groups A B and C as outputs At the same time data
4. N Power Output 5 VDC from computer bus ext 1A fast blow fuse recommended Power Required 5 VDC at 250 mA typical Size 6 9 Long Environmental Operating Temperature 0 C to 60 C Storage Temperature 50 C to 120 CC Humidity 0 to 90 RH non condensing 7 Manual PCI DIO 48 S EI a Q a E ui E a O O PORT B PORT CHI PORT C LO PORT PCI PORT B BUS PORT C HI CONTROL PORT C LO LOGIC INTERRUPT ENABLE EXTERNAL INTERRUPT Figure 1 1 Block Diagram CHANGE OF STATE DETECT CHANGE OF STATE DETECT Eleal uE E Aela Elek olub 401 Manual PCI DIO 48 S Chapter 2 Installation A printed Quick Start Guide QSG is packed with the card for your convenience If you ve already performed the steps from the QSG you may find this chapter to be redundant and may skip forward to begin developing your application The software provided with this card is on CD and must be installed onto your hard disk prior to use To do this perform the following steps as appropriate for your operating system Configure Card Options via Jumper Selection Before installing the card into your computer carefully read Chapter 3 Option Selection of this manual then configure the card according to your requirements Our Windows based setup program can be used in conjunction with Chapter 3 to assist in configuring jumpers on the card as well as provide additional descriptions for usage of
5. the various card options CD Software Installation The following instructions assume the CD ROM drive is drive D Please substitute the appropriate drive letter for Vour svstem as necessarv DOS 1 Place the CD into vour CD ROM drive 2 Type 2 Jie to change the active drive to the CD ROM drive 3 Type CINI SITJAJ O 0 sss to run the install program 4 Follow the on screen prompts to install the software for this board WINDOWS 1 Place the CD into vour CD ROM drive 2 The system should automatically run the install program If the install program does not run promptly click START RUN and type HAHNIA click OK or press E 3 Follow the on screen prompts to install the software for this board LINUX 1 Please refer to linux htm on the CD ROM for information on installing under linux Cautioni ESDA single static discharge can damage vour card and cause premature failurel Please follow all reasonable precautions to prevent a static discharge such as grounding vourself bv touching anv grounded surface prior to touching the card 9 Manual PCI DIO 48 S Hardware Installation 1 Make sure to set switches and jumpers from either the Option Selection section of this manual or from the suggestions of SETUP EXE 2 Do not install card into the computer until the software has been fullv installed 3 Turn OFF computer power AND unplug AC power from the system 4 Remove the computer cover 5 Carefully install the card i
6. this manual the term IRQCOS Driver will be used to refer to the appropriate file for your operating system Together with Win32COS DLL the IRQCOS Driver allows a program to easily respond to hardware change of state interrupt requests or IRQs and read data off the card following an IRQ Installation To install IRQCOS VXD in Windows 95 98 copy it to the directory C Windows System If your hard drive has a letter other than C substitute the appropriate letter It is not necessary to reboot your system prior to using IRQCOS VXD To install IRQCOS SYS in Windows NT copy it to the directory C WINNT System32 Drivers If your hard drive has a letter other than C substitute the appropriate letter It is not necessary to reboot your system prior to using IRQCOS SYS Win32COS DLL Description Win32COS DLL is a Dynamic Link Library or DLL for Windows 95 98 and NT It provides a simple interface to the IRQCOS Driver allowing a program to easily respond to hardware change of state interrupts and read data off the card after an IRQ occurs Two functions are exported by Win32COS DLL InitCOSDriver and GetCOSData To use these functions in a program they must first be imported into that program The simplest way to import these functions in Pascal is to include the Win32COS unit in your Uses clause or in C to include Win32COS H Additionally in C the library file CBCOS LIB for C Builder or VCCOS LIB for Visual C must be linked to the pro
7. ACCES which is found to be defective will be repaired or replaced subject to the following considerations Terms and Conditions If a unit is suspected of failure contact ACCES Customer Service department Be prepared to give the unit model number serial number and a description of the failure symptom s We may suggest some simple tests to confirm the failure We will assign a Return Material Authorization RMA number which must appear on the outer label of the return package All units components should be properly packed for handling and returned with freight prepaid to the ACCES designated Service Center and will be returned to the customer s user s site freight prepaid and invoiced Coverage First Three Years Returned unit part will be repaired and or replaced at ACCES option with no charge for labor or parts not excluded by warranty Warranty commences with equipment shipment Following Years Throughout your equipment s lifetime ACCES stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry Equipment Not Manufactured by ACCES Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the terms and conditions of the respective equipment manufacturer s warranty General Under this Warranty liability of ACCES is limited to replacing repairing or issuing credit at ACCES discretion for any products which are proved to be defect
8. I Further if a jumper is properly placed on the card the tristate buffers may be enabled disabled under program control See the Option Selection section to follow O wiring connections are via 50 pin headers on the board Two flat I O cables connect the card to termination panels Also this provides compatibilitv with OPTO 22 Gordos Potter 8 Brumfield et al module mounting racks Every second conductor of the flat cables is grounded to minimize crosstalk between signals in the cables If needed for external circuits 5 VDC power is available on each I O connector pin 49 If you use this power we recommend that you include a 1A fast blow fuse in your circuits in order to avoid possible damage to the host computer or cable in the event of a malfunction in those external circuits The card occupies sixteen bytes of I O address space The base address is selected by the system An illustrated setup program is provided on diskette with the card Interactive displays show locations and proper settings jumpers to set up the interrupt enable function Also sample programs in Turbo C and Turbo Pascal are presented in the Software section of this manual 6 Manual PCI DIO 48 S Specification Digital Inputs TTL Compatible Logic High 2 0 to 5 0 VDC Logic Low 0 5 to 0 8 VDC Input Load Hi 20 uA N Input Load Lo 200 UA Digital Outputs N Logic High 2 0 VDC min source 32 mA Logic Low 0 55 VDC max sink 64 mA
9. To ensure that there is minimum susceptibility to EMI and minimum radiation it is important that the card mounting bracket be properly screwed into place and that there be a positive chassis ground Also proper EMI cabling techniques cable connect to chassis ground at the aperture shielded twisted pair wires etc should be used for the input output wiring 10 Manual PCI DIO 48 S Chapter 3 Option Selection Refer to the setup programs on the CD provided with the card Also refer to Figure 1 1 Block Diagram and Figure 3 1 Option Selection Map when reading this section of the manual External Interrupts are accepted on the I O connector pin 9 bit C3 for each group The Interrupt signal is positive true External Interrupts are enabled if the IENO for Group 0 and IEN1 for Group 1 jumper is installed Interrupts are directed to an available IRQ level by the system A means of enabling or disabling the 74LS245 input output buffers under program control is provided at the jumper position labeled TST BEN When the jumper is in the BEN Buffer Enable position the I O buffers are always enabled When the jumper is in the TST Tristate position enabled disabled state is controlled by acontrol register See the programming section of this manual for a description An LED CR1 at the top left of the card to assist you in program development Each time an interrupt is generated the LED will illuminate and remain ON until the interrupt is r
10. and from this two s complement form if meaningful display is required Otherwise values returned from the InPortb function will be 128 to 127 rather than 0 to 255 An alternative is to perform all assignments in hexadecimal rather then decimal form Before the program will execute the GBL file must be modified to include the path to the VBACCES DLL as appropriate for your system Merely replace the statement VBACCES DLL with drive path VBACCES DLL As an alternative to changing the source code you can copy the VBACCES DLL file into your Windows directory This will allow multiple programs to find the same DLL without having to know where it is located Just leave off all references to a path in the GBL file as shown in the sample 16 Manual PCI DIO 48 S Chapter 6 Programming These cards are l 0 mapped devices that are easily configured from any language and any language can easily perform digital I O through the card s ports This is especially true if the form of the data is byte or word wide All references to the I O ports would be in absolute port addressing However a table could be used to convert the byte or word data ports to a logical reference Developing Your Application Software If you wish to gain a better understanding of the programs on diskette then the information in the following paragraphs will be of interest to you Refer to the data sheets and 8255 5 specification in Appendix A A total of 16 register lo
11. bit D7 is also latched in a buffer controller for the associated PPI chip A high state disables the buffers and thus all four buffers will be put in the tristate mode i e disabled c Now if anv of the groups are to be set as outputs vou mav set the values to the respective group with the outputs still in the tristate condition If all groups are to be set as inputs this step is not necessary d If data bit D7 is low when the control byte is written ONLY the associated buffer controller is addressed If for example a control byte of hex 80 has been sent as previously described and the data to be output are correct and it is now desired to open the three groups then it is necessary to send a control byte of hex 00 to base address 3 to enable the port 0 buffers When you do this the buffers will be enabled 18 Manual PCI DIO 48 S Note Note that all data bits except D7 must be the same for the two control bytes Those buffers will now remain enabled until another control byte with data bit D7 high is sent to base address 3 Similarly the Port 1 groups can be enabled disabled via the control register at base address 7 The following program fragment in C language illustrates the foregoing const BASE ADDRESS 0x300 outportb BASE ADDRESS 3 0x89 This instruction sets the mode to Mode 0 ports and B as output and port C as input Since bit D7 is high the output buffers are set to tristate condition See item b above
12. cations are used by the 48 S The PPIs are addressed consecutively with Address bits A3 through A0 as follows Base Address Base Address 1 Base Address 2 Base Address 3 Base Address 4 Base Address 5 Base Address 6 Base Address 7 Base Address 8 Base Address 9 Base Address B Base Address F Table 6 1 Address Assignment Table These cards use two 8255 5 PPIs to provide a total of 48 bits input output capabilitv The cards are designed to use each of these PPls in Mode 0 wherein Outputs are latched Inputs are not latched apop Operation Read Write Read Write Read Write Write Only Read Write Read Write Read Write Write Only Write Only Write Only Write Only Write Only There are two 8 bit groups A and B and two 4 bit groups C Hi and C Lo Any group can be configured as an input or an output Manual PCI DIO 48 S Each PPI contains a Control Register This write only 8 bit register is used to set the mode and direction of the groups At Power Up or Reset all I O lines are set as inputs Each PPI should be configured during initialization by writing to the Control Registers even if the groups are only going to be used as inputs Output buffers are automaticallv set bv hardware according to the Control Register states Note that Control Registers are located at base address 43 and base address 7 Bit assignments in each of these Control Registers are as follows aime jew 00
13. directory as a tool for you to use in configuring jumpers on the card It is menu driven and provides pictures of the card on the computer monitor You make simple keystrokes to select functions The picture on the monitor then changes to show how the jumper should be placed to effect your choices The setup program is a stand alone program that can be run at any time It does not require that the card be plugged into the computer for any part of the setup The program is self explanatory with operation instructions and on line help To run this program at the DOS prompt enter SETUP EXE followed by Er VisualBASIC Utility Driver Extensions to the VisualBASIC 3 0 language are also included on the diskette provided with your card For later versions of VisualBASIC use the ACCES32 driver and samples The extensions are in a directory named VBACCES These extensions are in the form of a DLL a GBL and a VisualBASIC sample Together these files allow you to access the port and main memory space in a fashion similar to BASIC QuickBASIC Pascal C C Assembly and most other standard languages To use these files in a VisualBASIC program you must create a MAK file File New Project similar to the sample provided or else modify your existing project file and include the GBL file File Add File Once this has been done VisualBASIC will be enhanced with the addition of the following functions InPortb Function Reads a byte from a har
14. dware port Due to limitations of VisualBASIC the number is returned in an integer Declaration function InPortb byval address as integer as integer 15 Manual PCI DIO 48 S InPort Function Reads an integer from a hardware port This function returns the 16 bit value obtained from reading the low byte from address and the high byte from address 1 Declaration function InPort bvval address as integer as integer OutPortb Function Writes the lower eight bits of value to the hardware port at address This function returns the value output Declaration function OutPortb byval address as integer bvval value as integer as integer OutPort Function Writes all 16 bits of value to the hardware port at address This function returns the value output Declaration function QutPort bvval address as integer bvval value as integer as integer Peek Function Reads a bvte from main memorv DRAM Declaration function Peek bvval segment as integer bvval offset as integer as integer Poke Function Writes the lower eight bits of value to segment offset Declaration function Poke bvval segment as integer bvval offset as integer bvval value as integer as integer Note that in all of the above functions an inherent limitation of BASIC in general and VisualBASIC in particular makes the values sent less intuitive All integers in BASIC are signed numbers wherein data are stored in two s complement form All bit patterns must be converted to
15. e return result is TRUE if initialization was completed successfully FALSE if not GetCOSData This function suspends the thread that it was called from and waits for an IRQ to occur on the IRQ level that was passed to InitCOSDriver GetCOSData will return immediately however if an IRQ occurred anytime before the GetCOSData call as long as InitCOSDriver was previously called Otherwise GetCOSData will not return until an IRQ occurs If the program needs to continue running while waiting for GetCOSData a separate thread should be created from which to call GetCOSData Immediately upon detecting an IRQ GetCOSData reads 48 bits of data off the card and returns the data in a pointer supplied by the calling application This pointer must be at least six bytes and must be allocated by the calling application For cards that contain less than 48 bits of data the lowest bits are valid and the extraneous data should be discarded For example a card that contains 24 bits of data will return the valid data in the lowest 3 bytes of the memory block pointed to by the supplied pointer while the upper 3 bytes will be invalid If multiple interrupts occur before any GetCOSData call the data read after the most recent IRQ will be returned The return result is TRUE if an IRQ was detected on the given IRQ level and data was successfully read FALSE if InitCOSDriver was not called before calling GetCOSData SETUP EXE This program is supplied in the root or base
16. eset If there is an immediate reset of the interrupt it is likely that the LED will not remain ON long enough to be observed Note A jumper must be installed in either the TST or the BEN position for the card to function The foregoing are the only manual setups necessary to use either Input Output selection The change of state Interrupt Disable Enable is done via software by writing to a control register in each PPI as described in Chapter 6 Programming 11 Manual PCI DIO 48 S F T oke A Tristate Mode k E advanced c enabled setting ee enabled bb SS Ing Buffer Enable disabled standard Group 1 setting bb C3 IRQ CIENO TST Group 0 Group 1 Pin 1 P3 1 Figure 3 1 Option Selection Map 12 Manual PCI DIO 48 S Chapter 4 Address Selection These cards use one address space occupying sixteen consecutive register locations PCI architecture is inherently plug and play in nature This means that the BIOS or Operating System determines the resources assigned to PCI cards rather than you selecting those resources with switches or jumpers As a result you cannot set or change the card s base address or IRQ level You can only determine what the system has assigned To determine the base address that has been assigned run the PCIFind EXE utility program This utility will display a list of all of the cards detected on the PCI bus the addresses assigned to each function on each of the ca
17. gram This is accomplished by adding it to the project or editing the makefile If you are not using the Win32COS header file and wish to import the functions manually the necessary lines in Pascal would be function InitCOSDriver BaseAddress DWORD IRQ BYTE BusType Smallint BusNumber BYTE BvteBool cdecl external Win32COS dll function GetCOSData Buf Pointer BvteBool cdecl external Win32COS dll To import the functions manuallv in C the necessarv lines would be extern C declspec dllimport unsigned char InitCOSDriver unsigned long BaseAddress unsigned char IRQ short BusType unsigned char BusNumber extern C declspec dllimport unsigned char GetCOSData void Buf 14 Manual PCI DIO 48 S InitCOSDriver This function performs the initialization required to respond to change of state IRQs It must be called before GetCOSData can be called although calling GetCOSData first will only cause it to return a value of FALSE The function s parameters are the card s Base Address the IRQ level to monitor the card s bus type and the card s bus number The last two parameters BusType and BusNumber are only used in Windows NT The header files Win32COS PAS for Pascal and Win32COS H for C contain the enumerated constants that can be passed in the BusType parameter The two possible values are PCIBus and Isa For Windows 95 98 the IRQCOS Driver ignores these parameters and their values can be set to zero Th
18. ive during the warranty period In no case is ACCES liable for consequential or special damage arriving from use or misuse of our product The customer is responsible for all charges caused by modifications or additions to ACCES equipment not approved in writing by ACCES or if in ACCES opinion the equipment has been subjected to abnormal use Abnormal use for purposes of this warranty is defined as any use to which the equipment is exposed other than that use specified or intended as evidenced by purchase or sales representation Other than the above no other warranty expressed or implied shall apply to any and all such equipment furnished or sold by ACCES 3 Manual PCI DIO 48 S Table of Contents Chapter 1 Introduction Tar fi dns aa ak Tr nee Tnt een nee re AE ae edad 5 Figure 1 1 Block Dia ram i ini rs ii pea A AT nent t ere Sk dr star tonte 8 Chapter 2 Installation is dain s g A g a 9 Chapter 3 Option Gelectton rs 11 Figure 3 1 Option Selection Map iii 12 Chapter 4 Address Selection rs 13 Chapter 55 Sottware aS E nd E er en et Sk Rte ere dzi i eus 14 Chapter 6 Programmin9 s ideas Eege akas aa KA et eege 17 Table 6 1 Address Assignment Table usine 17 Table 6 2 Control Register Bit Assignment sisi 18 Table 6 3 Change of state interrupt enable Register 21 Chapter 7 Connector Pin Assignments added 22 Table 7 1 Connector Pin Assignments
19. n all Port B bits 60 OUT BASEADDR 2 8HF Turn on all bits of Port C lower nvbble Enabling Disabling UO Buffers When using the tristate mode Jumper in the TST position the method to disable the I O buffers involved writing a control word to the Control Register at Base Address 3 and Base Address 7 This control word was required to have bit D7 the most significant bit set That meant that the PPI translated it as an active mode set and reset the output data latches to zero on all output ports and the output buffers were disabled However if the buffers are to be enabled at a later time the output latches will be in a zero state For example if all the outputs were 1 s they will now be 0 s and the output buffers will be disabled This problem can be resolved as follows Two computer I O bus addresses are available that permit you to enable or disable the I O buffers at will without programming the PPI mode Buffers for Port 0 bits are enabled disabled at Base Address 8 and buffers for Port 1 bits are enabled disabled at Base Address 9 To enable the buffers and to set outputs to the desired state you can write to the Control Register with bit D7 low If you wish to subsequently disable the buffers you can write to the Control Register with bit D7 high In this way you can enable disable the output buffers without programming the PPI mode Note When writing a command byte to these cards while the TST jumper is installed the PPI ou
20. n an available 5V or 3 3V PCI expansion slot you may need to remove a backplate first 6 Inspect for proper fit of the card and tighten screws Make sure that the card mounting bracket is properly screwed into place and that there is a positive chassis ground 7 Install an I O cable onto the card s bracket mounted connector 8 Replace the computer cover and turn ON the computer which should auto detect the card depending on the operating system and automatically finish installing the drivers 9 Run PClfind exe to complete installing the card into the registry for Windows only and to determine the assigned resources 10 Run one of the provided sample programs that was copied to the newly created card directory from the CD to test and validate your installation The base address assigned by BIOS or the operating system can change each time new hardware is installed into or removed from the computer Please recheck PCIFind or Device Manager if the hardware configuration is changed Software you write can automatically determine the base address of the card using a variety of methods depending on the operating system In DOS the PCNSOURCE directory shows the BIOS calls used to determine the address and IRQ assigned to installed PCI devices In Windows the Windows sample programs demonstrate querying the registry entries created by PCIFind and NTIOPCI SYS during boot up to determine this same information INPUT OUTPUT CONNECTIONS
21. rds and the respective IRQs allotted Alternativelv some operating svstems Windows95 98 2000 can be queried to determine which resources were assigned In these operating svstems vou can use either PCIFind or the Device Manager utilitv from the Svstem Properties Applet of the control panel The cards are installed in the Data Acquisition class of the Device Manager list Selecting the card clicking Properties and then selecting the Resources Tab will displav a list of the resources allocated to the card PCIFind uses the Vendor ID and Device ID to search for your card then reads the base address and IRQ assigned If you want to determine these yourself the Vendor ID is 494F ASCII for I O and the Device IDs are 48 0C60 48S 0E60 The PCI bus supports 64K of I O address space so your card s addresses may be located anywhere in the 0000 to FFFF hex range 13 Manual PCI DIO 48 S Chapter 5 Software Several programs are provided to support these Digital I O cards and also to help you develop your application s software Most of these programs are described on page 1 1 of this manual The following paragraphs describe the IRQCOS driver Win32COS driver applicable for 48S only setup program and the VisualBASIC utility program IRQCOS Driver Description IRQCOS VXD is a Virtual Device Driver or VxD for Windows 95 98 IRQCOS SYS is a Device Driver for Windows NT 4 0 Functionally they are identical and for the purposes of
22. siennes 22 4 Manual PCI DIO 48 S Chapter 1 Introduction Features 48 Bits of Digital Input Output Interrupt Generation on Input Change of State Model 48S Change of state Interrupt Software Enabled in Six 8 Input Ports Model 48S All 48 I O Lines Buffered on the Board I O Buffers Can Be Enabled Disabled under Program Control Four and Eight Bit Ports Independently Selectable for I O Pull Ups on I O Lines 5V Supply Available to the User Compatible with Industry Standard I O Racks like Gordos Opto 22 Potter amp Brumfield Western Reserve Controls etc Applications Automatic Test Systems Laboratory Automation Robotics Machine Control Security Systems Energy Management Relay Monitoring and Control Parallel Data Transfer to PC Sensing Switch Closures or TTL DTL CMOS Logic Driving Indicator Lights or Recorders These cards support 48 bits of parallel digital input output on the PCI bus They can be programmed to accept inputs or to provide outputs on two groups of three 8 bit ports Further in each group one of the ports can be further divided into two four bit nibbles The feature that distinguishes the 48S model from the 48 card is that the state of all inputs can be monitored and if any one or more bits change state a latched interrupt request can be generated Thus it is not necessary to use software to continuously poll the inputs to detect a change of state The change of
23. state interrupt is disabled enabled by a software write to an interrupt enable register Six bits in that register each control an eight input port at one of two type 8255 5 Programmable Peripheral Interface chips The change of state interrupt latch can be cleared by a software write Also bit C3 at each 24 bit port can be used as an external interrupt to the computer if the IEN jumpers are installed When bit C3 goes high edge triggering an interrupt is requested Interrupts from the ports are OR ed together and OR ed with the change of state interrupt Interrupt levels are assigned by the system The card was designed for industrial applications and can be installed in 7 or longer PCI slots of IBM or compatible computers Each I O line is buffered and capable of sourcing 32 mA or sinking 64mA The card contains two Programmable Peripheral Interface chips type 8255 5 PPI to provide computer interface to 48 I O lines Each PPI provides three 8 bit ports A B and C Each 8 bit port can be software configured to function as either inputs or output latches Port C can also be configured as four inputs and four output 5 Manual PCI DIO 48 S latches Pull ups on the card assure that there are no erroneous outputs at power up until the card is initialized by system software Tristate I O line buffers 74LS245 are configured automatically by hardware logic for input or output use according to direction assignment from a control register in the PP
24. tput buffers are disabled Thus when you desire to to change the mode you must first set the new mode and then enable the buffers Enabling the buffers can be done at either Base Address 3 or 7 or Base Address 8 or 9 20 Manual PCI DIO 48 S Change of State Interrupts At Power up or Reset a latch disables all IRQ sources on the card In order to properly disable enable interrupts you must program the Change Of State Interrupt Enable Register first To program this Change of State Interrupt Enable Register write to it at Base Address B Data bits DO through D5 control ports A B and C of the 8255 PPIs as shown in Table 4 Any access of Base B will enable the non COS IRQ associated with port C bit 3 Table 6 3 Change of state interrupt enable Register Writing a one disables the port writing a zero enables it When IRQs occur the interrupt state is latched To clear the latch write anything to Base Address F 21 Manual PCI DIO 48 S Chapter 7 Connector Pin Assignments Two 50 pin headers are provided on these cards one for each 24 bit I O group The mating connector is an AMP type 1 746285 0 or equivalent Connector pin assignments are listed below Notice that every second line is grounded to minimize crosstalk between signals Port C Hi Port C Hi Port C Hi Port C Hi Port C Lo Port C Lo Port C Lo Port C Lo Kell UT U U DD 1 GD 1 GD 1 o AJo U DO D D U WwW D Oo TU U wo oa Oo
25. ya ACCES I O PRODUCTS INC 10623 Roselle Street San Diego CA 92121 858 550 9559 FAX 858 550 7322 contactus accesio com www accesio com MODEL PCI DIO 48 S USER MANUAL FILE MPCI DIO 48S D3e Notice The information in this document is provided for reference only ACCES does not assume any liability arising out of the application or use of the information or products described herein This document may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of ACCES nor the rights of others IBM PC PO XT and PC AT are registered trademarks of the International Business Machines Corporation Printed in USA Copyright 1995 2005 by ACCES I O Products Inc 10623 Roselle Street San Diego CA 92121 All rights reserved WARNING ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF ALWAYS TURN COMPUTER POWER OFF BEFORE INSTALLING A CARD CONNECTING AND DISCONNECTING CABLES OR INSTALLING CARDS INTO A SYSTEM WITH THE COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I O CARD AND WILL VOID ALL WARRANTIES IMPLIED OR EXPRESSED 2 Manual PCI DIO 48 S Warranty Prior to shipment ACCES equipment is thoroughly inspected and tested to applicable specifications However should equipment failure occur ACCES assures its customers that prompt service and support will be available All equipment originally manufactured by
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