82C55 Interface Datasheet

82C55 Datasheet, PDF, Equivalent


Part Number

82C55

Description

CMOS Programmable peripheral Interface

Manufacture

Wing Shing Computer Components

Total Page 25 Pages
Datasheet
Download 82C55 Datasheet


82C55
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.
oo
0 C to 70 C
40DIP
oo
0 C to 70 C
44 PLCC
oo
0 C to 70 C
44 QFP
Pinouts
PA3 1
40 PA4
PA2 2
39 PA5
PA1 3
38 PA6
PA0 4
37 PA7
RD 5
36 WR
CS 6
35 RESET
GND 7 WS82C55A-5P 34 D0
A1 8 WS82C55AP 33 D1
A0 9
32 D2
PC7 10
31 D3
PC6 11
30 D4
PC5 12
29 D5
PC4 13 DIP-40
PC0 14
28 D6
27 D7
PC1 15
PC2 16
26 VCC
25 PB7
PC3 17
24 PB6
PB0 18
23 PB5
PB1 19
22 PB4
PB2 20
21 PB3
CS
GND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
PC2
1
2
3
4
5
6
7
8
9
10
11
WS82C55A-5Q
WS82C55AQ
QFP-44
33 RESET
32 D0
31 D1
30 D2.
29 D3
28 D4
27 D5
26 D6
25 D7
24 VCC
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
VCC
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
1
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com

82C55
Pin Description ( For DIP-40)
SYMBOL
VCC
PIN
NUMBER
26
TYPE
GND
D0-D7
7
27-34
I/O
RESET
35
I
CS 6
I
RD 5
I
WR 36
I
A0-A1
8, 9
I
PA0-PA7
1-4, 37-40
PB0-PB7
PC0-PC7
18-25
10-17
Functional Diagram
I/O
I/O
I/O
WS82C55A
DESCRIPTION
VCC: The +5V power supply pin. A 0.1µF capacitor between pins 26 and 7 is
recommended for decoupling.
GROUND
DATA BUS: The Data Bus lines are bidirectional three-state pins connected to the
system data bus.
RESET: A high on this input clears the control register and all ports (A, B, C) are set
to the input mode with the “Bus Hold” circuitry turned on.
CHIP SELECT: Chip select is an active low input used to enable the 82C55A onto the
Data Bus for CPU communications.
READ: Read is an active low input control signal used by the CPU to read status
information or data via the data bus.
WRITE: Write is an active low input control signal used by the CPU to load control
words and data into the 82C55A.
ADDRESS: These input signals, in conjunction with the RD and WR inputs, control
the selection of one of the three ports or the control word register. A0 and A1 are
normally connected to the least significant bits of the Address Bus A0, A1.
PORT A: 8-bit input and output port. Both bus hold high and bus hold low circuitry are
present on this port.
PORT B: 8-bit input and output port. Bus hold high circuitry is present on this port.
PORT C: 8-bit input and output port. Bus hold circuitry is present on this port.
POWER
SUPPLIES
+5V
GND
GROUP A
CONTROL
BI-DIRECTIONAL
DATA BUS
D7-D0
DATA BUS
BUFFER
RD
WR
A1
A0
RESET
CS
READ
WRITE
CONTROL
LOGIC
8-BIT
INTERNAL
DATA BUS
GROUP B
CONTROL
GROUP A
PORT A
(8)
GROUP A
PORT C
UPPER
(4)
GROUP B
PORT C
LOWER
(4)
GROUP B
PORT B
(8)
I/O
PA7-PA0
I/O
PC7-PC4
I/O
PC3-PC0
I/O
PB7-PB0
2


Features CMOS Programmable peripheral Interface F eatures • Pin Compatible with NMOS 82 55A • 24 Programmable I/O Pins • Fu lly TTL Compatible • High Speed, No Wait State” Operation with 5MHz 80C 86 and 8MHz 80C88 • Direct Bit Set/Re set Capability • Enhanced Control Wor d Read Capability • L7 Process • 2. 5mA Drive Capability on All I/O Ports Low Standby Power (ICCSB) . . . . . . . . . . . . . . . . .10µA WS82C55A Description The WS82C55A is a high per formance CMOS version of the industry s tandard 8255A and is manufactured using a self-aligned silicon gate CMOS proce ss (Scaled SAJI IV). It is a general pu rpose programmable I/O device which may be used with many different microproce ssors. There are 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of oper ation. The high performance and industr y standard configuration of the WS82C5 5A make it compatible with the 80C86, a nd other microprocessors. Static CMOS circuit design insures low operating power. TTL co.
Keywords 82C55, datasheet, pdf, Wing Shing Computer Components, CMOS, Programmable, peripheral, Interface, 2C55, C55, 55, 82C5, 82C, 82, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)