82C55
器件描述：CMOS Programmable peripheral Interface
器件厂商：WINGS [Wing Shing Computer Components]
文件大小：476.66KB，共25页
Sponsor by e络盟器件资料摘要：
1
Features
• Pin Compatible with NMOS 8255A
• 24 Programmable I/O Pins
• Fully TTL Compatible
•HighSpeed,No“WaitState”Operationwith5MHz
• 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
Description
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
makeitcompatiblewiththe80C86,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
advancedSAJIprocessresultsinperformanceequal
to or greater than existing functionally equivalent products at
a fraction of the power.
PA3
PA2
PA1
PA0
RD
CS
GND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
PC2
PC3
PB0
PB1
PB2
PA4
PA5
PA6
PA7
WR
RESET
D0
D1
D2
D3
D4
D5
D6
D7
V
CC
PB7
PB6
PB5
PB4
PB3
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Wing Shing Computer Components Co., (H.K.)Ltd. Tel:(852)2341 9276 Fax:(852)2797 8153
Homepage: http://www.wingshing.com E-mail: wsccltd@hkstar.com
33
32
31
30
29
28
27
RESET
D
0
D
1
D
2.
D
3
D
4
D
5
CS
GND
A
1
A
0
PC
7
PC
6
PC
5
12 13
14 15 16 17 18
NC
PC
3
PB
0
PB
1
PB
2
V
CC
PB
3
44 43 42 41 40 39 38
RD PA
0
PA
1
PA
2
PA
3
V
CC
PA
4
1
2
3
4
5
6
7
26
25
24
23
D
6
D
7
V
CC
PB
7
PC
4
PC
0
PC
1
PC
2
8
9
10
11
19 20 21 22
PB
4
PB
5
PB
6
NC
37 36 35 34
PA
5
PA
6
PA
7
WR
CS
GND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
PC3 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7
NC
NC
RESET
D0
D1
D2
D3
D4
D5
D6
D7
V
CC
RD PA
0
PA
1
PA
2
PA
3
PA
4
PA
5
PA
6
PA
7
WRNC
PC2
NC
44 43 42 41 40
39
38
37
36
35
34
33
32
31
30
29
2827
123456
262524232221201918
7
8
9
10
11
12
13
14
15
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17
Features
• Pin Compatible with NMOS 8255A
• 24 Programmable I/O Pins
• Fully TTL Compatible
•HighSpeed,No“WaitState”Operationwith5MHz
• 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
Description
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
makeitcompatiblewiththe80C86,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
advancedSAJIprocessresultsinperformanceequal
to or greater than existing functionally equivalent products at
a fraction of the power.
PA3
PA2
PA1
PA0
RD
CS
GND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
PC2
PC3
PB0
PB1
PB2
PA4
PA5
PA6
PA7
WR
RESET
D0
D1
D2
D3
D4
D5
D6
D7
V
CC
PB7
PB6
PB5
PB4
PB3
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Wing Shing Computer Components Co., (H.K.)Ltd. Tel:(852)2341 9276 Fax:(852)2797 8153
Homepage: http://www.wingshing.com E-mail: wsccltd@hkstar.com
33
32
31
30
29
28
27
RESET
D
0
D
1
D
2.
D
3
D
4
D
5
CS
GND
A
1
A
0
PC
7
PC
6
PC
5
12 13
14 15 16 17 18
NC
PC
3
PB
0
PB
1
PB
2
V
CC
PB
3
44 43 42 41 40 39 38
RD PA
0
PA
1
PA
2
PA
3
V
CC
PA
4
1
2
3
4
5
6
7
26
25
24
23
D
6
D
7
V
CC
PB
7
PC
4
PC
0
PC
1
PC
2
8
9
10
11
19 20 21 22
PB
4
PB
5
PB
6
NC
37 36 35 34
PA
5
PA
6
PA
7
WR
CS
GND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
PC3 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7
NC
NC
RESET
D0
D1
D2
D3
D4
D5
D6
D7
V
CC
RD PA
0
PA
1
PA
2
PA
3
PA
4
PA
5
PA
6
PA
7
WRNC
PC2
NC
44 43 42 41 40
39
38
37
36
35
34
33
32
31
30
29
2827
123456
262524232221201918
7
8
9
10
11
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14
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