82C55A Datasheet, PDF (6/26 Pages) Intel Corporation – CHMOS PROGRAMMABLE PERIPHERAL INTERFACE

Mode 0 (Basic Input)
RD
INPUT
CS, A1, A0
D7-D0
82C55A
tRR
tIR
tAR
tHR
tRA
tRD
tDF
Mode 0 (Basic Output)
WR
D7-D0
tAW
CS, A1, A0
OUTPUT
Mode 0 Configurations
CONTROL WORD #0
D7 D6 D5 D4 D3 D2 D1 D0
10 0 0 0 0 0 0
A
82C55A
D7 - D0
C
B
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
tWW
tDW
tWD
tWA
tWB
CONTROL WORD #2
D7 D6 D5 D4 D3 D2 D1 D0
10 0 0 0 0 1 0
A
82C55A
D7 - D0
C
B
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
CONTROL WORD #1
D7 D6 D5 D4 D3 D2 D1 D0
10 0 0 0 0 0 1
A
82C55A
D7 - D0
C
B
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
CONTROL WORD #3
D7 D6 D5 D4 D3 D2 D1 D0
10 0 0 0 0 1 1
A
82C55A
D7 - D0
C
B
8
PA7 - PA0
4
PC7 - PC4
4
PC3 - PC0
8
PB7 - PB0
6