WS82C55A Datasheet, PDF (1/25 Pages) Wing Shing Computer Components – CMOS Programmable peripheral Interface

CMOS Programmable peripheral
Interface
WS82C55A
Features
Description
• 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) . . . . . . . . . . . . . . . . .10µA
Ordering Information
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.
PART NUMBERS
WS82C55A-5P
WS82C55A-5C
WS82C55A-5Q
SPEED
5MHz
5MHz
5MHz
PART NUMBERS
WS82C55AP
WS82C55AC
WS82C55AQ
SPEED
8MHz
8MHz
8MHz
TEMPERATURE
RANGE
PKG.
o
o
0 C to 70 C
40DIP
o
o
0 C to 70 C
44 PLCC
o
o
0 C to 70 C
44 QFP
Pinouts
PA3 1
40 PA4
PA2 2
39 PA5
PA1 3
PA0 4
38 PA6
37 PA7
CS 1
RD 5
36 WR _{GND 2}
CS 6
35 RESET
GND 7 ^WS82C55A-5P 34 D0
A1 8 WS82C55AP 33 D1
A0 9
32 D2
PC7 10
31 D3
A₁ 3
A₀ 4
PC₇ 5
PC₆ 6
PC6 11
PC5 12
PC4 13
PC0 14
PC1 15
PC2 16
DIP-40
30 D4
29 D5
28 D6
27 D7
26 V_CC
25 PB7
PC₅ 7
PC₄ 8
PC₀ 9
PC₁ 10
PC₂ 11
PC3 17
24 PB6
PB0 18
23 PB5
PB1 19
22 PB4
PB2 20
21 PB3
WS82C55A-5Q
WS82C55AQ
QFP-44
33 RESET
32 D₀
31 D₁
30 D_2.
29 D₃
28 D₄
27 D₅
26 D₆
25 D₇
24 V_CC
23 PB₇
CS
GND
A1
A0
PC7
NC
PC6
PC5
PC4
PC0
PC1
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
WS82C55A-5C
37
10
WS82C55AC
36
11
35
12
34
13
33
14
PLCC-44
32
15
31
16
30
17
29
18 1920 21 22 23 24 25 26 27 28
RESET
D0
D1
D2
D3
NC
D4
D5
D6
D7
V_CC
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
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