82C59A
ICW1
A
0
0
D
7
A
7
D
6
A
6
D
5
A
5
D
4
1
D
3
LTIM
D
2
ADI
D
1
SNGL
D
0
IC4
1 = ICW4 needed
0 = No ICW4 needed
1 = Single
0 = Cascade Mode
CALL address interval
1 = Interval of 4
0 = Interval of 8
1 = Level triggered mode
0 = Edge triggered mode
A
7
- A
5
of Interrupt vector address
(MCS-80/85 mode only)
D
7
A
15
T
7
D
6
A
14
T
6
D
5
A
13
T
5
D
4
A
12
T
4
D
3
A
11
T
3
A
15
- A
8
of interrupt vector address
(MCS80/85 mode)
T
7
- T
3
of interrupt vector address
(8086/8088 mode)
ICW3 (MASTER DEVICE)
A
0
1
D
7
S
7
D
6
S
6
D
5
S
5
D
4
S
4
D
3
S
3
D
2
S
2
D
1
S
1
D
0
S
0
1 = IR input has a slave
0 = IR input does not have a slave
ICW3 (SLAVE DEVICE)
A
0
1
D
7
0
D
6
0
D
5
0
D
4
0
D
3
0
D
2
ID
2
D
1
ID
1
D
0
ID
0
SLAVE ID (NOTE)
0
0
0
0
ICW4
A
0
1
D
7
0
D
6
0
D
5
0
D
4
SFNM
D
3
BUF
D
2
M/S
D
1
AEOI
D
0
µPM
1 = 8086/8088 mode
0 = MCS-80/85 mode
0
1
1
X
0
1
- Non buffered mode
1 = Auto EOI
0 = Normal EOI
1
1
0
0
2
0
1
0
3
1
1
0
4
0
0
1
5
1
0
1
6
0
1
1
7
1
1
1
D
2
A
10
A
9
D
1
D
0
A
8
ICW2
A
0
1
- Buffered mode slave
- Buffered mode master
1 = Special fully nested moded
0 = Not special fully nested mode
NOTE: Slave ID is equal to the corresponding master IR input.
FIGURE 7. 82C59A INITIALIZATION COMMAND WORD FORMAT
4-8
INTERSIL [ INTERSIL CORPORATION ]
