msm82c55a-2gs Oki Semiconductor, msm82c55a-2gs Datasheet - Page 18

• Manufacturer Part Number: msm82c55a-2gs
• Description: Cmos Programmable Peripheral Interface
• Manufacturer: Oki Semiconductor

¡ Semiconductor
D
1
7
WR
RD
D
1
6
D
¥
5
D
¥
4
D
¥
No I/O specification is required for mode 2,
since it is a bidirectional operation.
This bit is therefore treated as "Don't Care".
When group A is set to mode 2, this bit is treated
as "Don't Care".
As all of 8 bits of port C become
control pins in this case, D
D
3
0
PA
PB
bits are treated as "Don't Care".
7
7
D
- PA
- PB
1
2
PC
PC
PC
PC
PC
PC
PC
PC
3
0
7
6
4
5
0
2
1
0
D
1
1
8
8
D
INTR
OBF
ACK
STB
IBF
STB
IBF
INTR
¥
0
A
B
A
A
B
A
A
B
3
and
MSM82C55A-2RS/GS/VJS
Group A: Mode 2
Group B: Mode 1 Input
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