ICS Advent DIO24-P Скачать руководство пользователя страница 18 | Manualshive

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ICS Advent DIO24-P Скачать руководство пользователя страница 18

Manual Number: 00431-024-14

Page 3-2

DIO24-P Manual

Control Register

The 8255 has several input/output modes and the user is directed to the 8255 data sheet, included

with this manual, for complete programming details. The following information will provide suf-

ficient information for the majority of users.

Before the 8255 can be used, it must be configured. Each of the 8-bit ports A, B, and C can be

selected as input or output ports and port C can also be selected as a control port. Note that the

8255 power-up default mode is with all ports configured for inputs and the chip can be used in that

mode, although it is a good practice to reconfigure the chip for this mode even if that is the one

you intend to use.

8255 Mode Definition Format

Modes of Operation

The 8255 offers 3 MODES of operation as set by bits 3, 6 and 7. Bit 3 sets the mode for port B and

bits 6 & 7 for port A. Port C has no independent modes. The modes are described below (Mode 1

and 2 descriptions are provided for information only):

MODE 0 - Basic Input/Output - This is the standard PCDIO mode
MODE 1 - Strobed Input/Output
MODE 2 - Bi-directional Bus

Mode 0

This functional configuration provides simple input and output operations for each of the three

ports. No handshaking is required, data is simply written to or read from a specified port.

Mode 0 Basic Functional Definitions:

Two 8-bit ports and two 4-bit ports
Any port can be input or output
Outputs are latched
Inputs are not latched
16 different Input/Output combinations are possible in this mode

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Содержание DIO24-P

Страница 1: ...Model DIO24 P Product Manual MANUAL NUMBER 00431 024 14B...

Страница 2: ...ual in our online Support Library Thank you The information in this document is provided for reference only ICS Advent does not assume any liability arising from the application or use of the informat...

Страница 3: ...Page iv This page intentionally left blank...

Страница 4: ...ts which are not in an as new and re saleable condition are not eligible for credit return and will be returned to the customer Limited Warranty Effective April 1 1998 all products carry a 2 year limi...

Страница 5: ...made by various manufacturers in performing warranty repairs and building replacement products If ICS Advent repairs or replaces a product its warranty term is not extended ICSAdvent will normally re...

Страница 6: ...Cautions and Warnings are accented with triangular symbols The exclamation symbol is used in all cautions and warnings to help alert you to the important instructions The lightning flash symbol is us...

Страница 7: ...Page viii This page intentionally left blank...

Страница 8: ...Register Access 3 1 Control Register 3 2 8255 Mode Definition Format 3 2 Modes of Operation 3 2 Mode 0 3 2 Mode 1 3 3 Mode 2 3 3 Bit Set Reset 3 3 Bit Set Reset Format 3 3 Chapter 4 Peek and Poke Driv...

Страница 9: ...x CE Declaration of Conformity List of Figures Figure 1 DIO24 P Block Diagram 1 2 Figure 2 DIO24 Layout 2 3 List of Tables Table 4 1 Peek and Poke Library Functions 4 2 Current Revision 14B December...

Страница 10: ...complete technical description and summary of the various operating modes of the 8255 Interrupt handling is via a tristate driver with separate enable interrupt enable active low This may be connecte...

Страница 11: ...Computer Source The Model DIO24 P is designed to be CE Compliant when used in an CE compliant chassis Maintaining CE Compliance also requires proper cabling and termination techniques The user is adv...

Страница 12: ...umidity 0 to 90 non condensing Inputs and Outputs Input Output Lines 24 Input Logic Low Voltage 0 5V Min to 0 8V Max Input Logic High Voltage 2 0V Min to 5 0V Max Input Load Current 10uA Min to 10uA M...

Страница 13: ...ll drive 1 standard TTL load or 4 LSTTL loads CMOS compatiblity can be obtained by connecting a 10k Ohm pullup resistor from the input or output to 5V I O Address Requirement 4 Bytes I O Connector DB3...

Страница 14: ...mputer Some of the address locations commonly used are listed in the table that follows Refer to the IBM Technical Reference Manual for additional details ADDRESS DEVICE ADDRESS DEVICE 000 0FF Interna...

Страница 15: ...upts These inter rupts can be directed to any of the Interrupt Request Lines IRQ 2 3 4 5 6 and 7 available on the 8 bit PC XT AT I O expansion bus Pin 1 Channel 23 is configured as an INTERRUPT INPUT...

Страница 16: ...on Manual Number 00431 024 14 Page 2 3 Figure 2 DIO24 Layout Connector Pin Assignments All digital I O is through a standard DB37 male connector A listing of all pinouts is shown on the schematic incl...

Страница 17: ...e address definitions are BASE ADDRESS 0 Port A Read Write 1 Port B Read Write 2 Port C Read Write 3 Control Register Write Only To access the board from BASIC for example 1 Determine which ports are...

Страница 18: ...r this mode even if that is the one you intend to use 8255 Mode Definition Format Modes of Operation The 8255 offers 3 MODES of operation as set by bits 3 6 and 7 Bit 3 sets the mode for port B and bi...

Страница 19: ...eceiving data bidirectional bus I O Handshaking signals are provided to maintain proper bus flow discipline in a similar manner to MODE 1 Interrupt generation and enable disable functions are also ava...

Страница 20: ...o dynamic linked libraries are used to access the Peek and Poke driver under Windows 95 or Windows NT pplib95 lib and pplibnt lib pplib95 dll pplibnt dll To use a library add pplib95 lib or pplibnt li...

Страница 21: ...UH WR UHOHDVH WKLV PHPRU UHJLRQ EDFN WR WKH V VWHP DV IROORZV ics_pp_release_pointer void ics_pp_release_pointer void address int length 7KLV IXQFWLRQ UHOHDVHV D PHPRU PDSSLQJ PDGH ZLWK ics_pp_make_po...

Страница 22: ...Long Private Declare Function ICS_PP_OUTPW Lib pplib95 ByVal port As Long ByVal data As Long As Long Private Declare Function ICS_PP_OUTPL Lib pplib95 ByVal port As Long ByVal data As Long As Long Pri...

Страница 23: ...ng Private Declare Function ICS_PP_INPW Lib pplibnt ByVal port As Long As Long Private Declare Function ICS_PP_INPL Lib pplibnt ByVal port As Long As Long Installing the Windows NT Peek and Poke Drive...

Страница 24: ...hardware types and select System devices Click the Next button Click the Have Disk button Insert the disk labeled Windows NT Windows 95 PeekPoke Driver Disk Make sure A Windows95 is selected as the so...

Страница 25: ...Device Manager tab Click Expand System Devices The system displays a list of devices Click the PeekPoke driver NOTE If the driver does not appear check whether the registry has been set to Read Only C...

Страница 26: ...A 8255 Data Sheet Manual Number 00431 024 14 Page A 1 Appendix A 8255 Data Sheet The 8255 Data Sheet is available on request Please contact Industrial Computer Source Post Sales Support Line at 800 4...

Страница 27: ...Appendix B Pinout Drawing Manual Number 00431 024 14 Page B 1 Appendix B Pinout Drawing...

Страница 28: ...995RadiatedRFFieldImmunity EN61000 4 4 1995EFTImmunityforACandI OLines EN 60950 1992 Safety of InformationTechnology Equipment Thetechnicaldocumentationrequiredtodemonstratethisproductmeetstherequirem...

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