Intel 8253 - Control Word

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