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P82C55A Datasheet

  • P82C55A

  • CHMOS PROGRAMMABLE PERIPHERAL INTERFACE

  • 23頁

  • INTEL   INTEL

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82C55A
CHMOS PROGRAMMABLE PERIPHERAL INTERFACE
Y
Compatible with all Intel and Most
Other Microprocessors
High Speed 鈥樷€榋ero Wait State鈥欌€?/div>
Operation with 8 MHz 8086 88 and
80186 188
24 Programmable I O Pins
Low Power CHMOS
Completely TTL Compatible
Y
Y
Y
Control Word Read-Back Capability
Direct Bit Set Reset Capability
2 5 mA DC Drive Capability on all I O
Port Outputs
Available in 40-Pin DIP and 44-Pin PLCC
Available in EXPRESS
Standard Temperature Range
Extended Temperature Range
Y
Y
Y
Y
Y
Y
The Intel 82C55A is a high-performance CHMOS version of the industry standard 8255A general purpose
programmable I O device which is designed for use with all Intel and most other microprocessors It provides
24 I O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation
The 82C55A is pin compatible with the NMOS 8255A and 8255A-5
In MODE 0 each group of 12 I O pins may be programmed in sets of 4 and 8 to be inputs or outputs In
MODE 1 each group may be programmed to have 8 lines of input or output 3 of the remaining 4 pins are used
for handshaking and interrupt control signals MODE 2 is a strobed bi-directional bus configuration
The 82C55A is fabricated on Intel鈥檚 advanced CHMOS III technology which provides low power consumption
with performance equal to or greater than the equivalent NMOS product The 82C55A is available in 40-pin
DIP and 44-pin plastic leaded chip carrier (PLCC) packages
231256 鈥?1
231256 鈥?1
Figure 1 82C55A Block Diagram
231256 鈥?
Figure 2 82C55A Pinout
Diagrams are for pin reference only Package
sizes are not to scale
October 1995
Order Number 231256-004

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