81C55 View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
Manufacturer
81C55 Datasheet PDF : 19 Pages
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¡ Semiconductor
PIN CONFIGURATION (TOP VIEW)
44 pin Plastic QFP
TIMEROUT 1
IO/M 2
CE 3
RD 4
WR 5
ALE 6
AD0 7
AD1 8
AD2 9
AD3 10
NC 11
MSM81C55-5RS/GS/JS
40 pin Plastic DIP
PC3 1
PC4 2
TIMER IN 3
RESET 4
PC5 5
TIMER OUT 6
IO/M 7
CE 8
RD 9
WR 10
ALE 11
AD0 12
AD1 13
AD2 14
AD3 15
AD4 16
AD5 17
AD6 18
AD7 19
GND 20
40 VCC
39 PC2
38 PC1
37 PC0
36 PB7
35 PB6
34 PB5
33 PB4
32 PB3
31 PB2
30 PB1
29 PB0
28 PA7
27 PA6
26 PA5
25 PA4
24 PA3
23 PA2
22 PA1
21 PA0
33 PB6
32 PB5
31 PB4
30 PB3
29 PB2
28 PB1
27 PB0
26 PA7
25 PA6
24 PA5
23 PA4
44 pin Plastic QFJ
TIMER OUT 7
IO/M 8
CE 9
RD 10
WR 11
NC 12
ALE 13
AD0 14
AD1 15
AD2 16
AD3 17
39 PB6
38 PB5
37 PB4
36 PB3
35 PB2
34 NC
33 PB1
32 PB0
31 PA7
30 PA6
29 PA5
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