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WS82C55A-5Q

Part Number	WS82C55A-5Q
Manufacturer	Wing Shing Computer Components
Description	CMOS Programmable peripheral Interface
Published	Apr 17, 2005
Detailed Description	CMOS Programmable peripheral Interface Features • Pin Compatible with NMOS 8255A • 24 Programmable I/O Pins • Fully TTL ...
Datasheet	WS82C55A-5Q PDF File

Overview

CMOS Programmable peripheral Interface Features • Pin Compatible with NMOS 8255A • 24 Programmable I/O Pins • Fully TTL Compatible • High Speed, No “Wait State” Operation with 5MHz 80C86 and 8MHz 80C88 • Direct Bit Set/Reset Capability • Enhanced Control Word Read Capability • L7 Process • 2.
5mA Drive Capability on All I/O Ports • Low Standby Power (ICCSB) .
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10µA WS82C55A Description The WS82C55A is a high performance CMOS version of the industry standard 8255A and is manufactured using a self-aligned silicon gate CMOS process (Scaled SAJI IV).
It is a general purpose programmable I/O device which may be used with many different microprocessors.
There are 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation.
The high performance and industry standard conﬁguration of the WS82C55A make it compatible with the 80C86, and other microprocessors.
Static CMOS circuit design insures low operating power.
TTL compatibility over the full military temperature range and bus hold circuitry eliminate the need for pull-up resistors.
The advanced SAJI process results in performance equal to or greater than existing functionally equivalent products at a fraction of the power.
SPEED Ordering Information PART NUMBERS SPEED PART NUMBERS TEMPERATURE RANGE o PKG.
40DIP 44 PLCC 44 QFP WS82C55A-5P 5MHz WS82C55AP 8MHz 8MHz 0 C to 70 C o o WS82C55A-5C WS82C55A-5Q 5MHz 5MHz WS82C55AC WS82C55AQ 0 C to 70 C o 8MHz 0 C to 70 C o o Pinouts 44 RD 43 PA0 42 PA1 41 PA2 40 PA3 38 PA4 37 PA5 36 PA6 35 PA7 34 WR 39 VCC PA3 PA2 PA1 PA0 RD CS GND A1 A0 PC7 PC6 PC5 PC4 PC0 PC1 PC2 PC3 PB0 PB1 PB2 40 39 38 37 36 5 35 6 7 WS82C55A-5P 34 8 WS82C55AP 33 32 9 10 31 11 30 12 29 1 2 3 4 13 14 15 16 17 18 19 20 PA4 PA5 PA6 CS 1 PA7 WR GND 2 RESET A1 3 D0 A0 4 D1 PC7 5 D2 PC6 6 D3 D4 PC5 7 D5 PC4 8 D6 PC0 9 D7 PC1 10 VCC PC2 11 PB7 PB6 PB5 PB4 PB3 RD PA0 PA1 PA2 PA3 NC PA4 PA5 PA6 PA7 WR 6 5 4 3 2 1 44 43 42 41 ...

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