82C55A_06 Datasheet, PDF (13/29 Pages) Intersil Corporation – CMOS Programmable Peripheral Interface

MODE 2 AND MODE 0 (INPUT)
CONTROL WORD
D7 D6 D5 D4 D3 D2 D1 D0
11
0 1 1/0
PC2-PC0
1 = INPUT
0 = OUTPUT
RD
WR
82C55A
PC3
INTRA
PA7-PA0 8
PC7
OBFA
PC6
ACKA
PC4
STBA
PC5
PC2-PC0
IBFA
3
I/O
PB7-PB0 ₈
MODE 2 AND MODE 0 (OUTPUT)
CONTROL WORD
D7 D6 D5 D4 D3 D2 D1 D0
11
0 0 1/0
PC2-PC0
1 = INPUT
0 = OUTPUT
RD
WR
PC3
INTRA
PA7-PA0 8
PC7
OBFA
PC6
ACKA
PC4
STBA
PC5
PC2-PC0
IBFA
3
I/O
PB7, PB0 ₈
MODE 2 AND MODE 1 (OUTPUT)
CONTROL WORD
D7 D6 D5 D4 D3 D2 D1 D0
11
10
RD
WR
PC3
INTRA
PA7-PA0 8
PC7
PC6
PC4
PC5
PB7-PB0
OBFA
ACKA
STBA
IBFA
8
PC1
OBFB
PC2
ACKB
PC0
INTRB
MODE 2 AND MODE 1 (INPUT)
CONTROL WORD
D7 D6 D5 D4 D3 D2 D1 D0
11
11
RD
WR
FIGURE 14. MODE 2 COMBINATIONS
PC3
INTRA
PA7-PA0 8
PC7
PC6
PC4
PC5
PB7-PB0
OBFA
ACKA
STBA
IBFA
8
PC2
STBB
PC1
IBFB
PC0
INTRB
13
FN2969.10
November 16, 2006