4-8
D
7
A
0
D
6
D
5
D
4
D
3
D
2
D
1
D
0
0
A
7
A
6
A
5
LTIM1 ADI SNGL IC4
ICW1
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
0
D
6
D
5
D
4
D
3
D
2
D
1
D
0
1
A
15
A
14
A
13
A
11
A
10
A
9
A
8
A
12
T
7
T
6
T
5
T
4
T
3
ICW2
A
15
- A
8
of interrupt vector address
(MCS80/85 mode)
T
7
- T
3
of interrupt vector address
(8086/8088 mode)
D
7
A
0
D
6
D
5
D
4
D
3
D
2
D
1
D
0
1S
7
S
6
S
5
S
3
S
2
S
1
S
0
S
4
ICW3 (MASTER DEVICE)
1 = IR input has a slave
0 = IR input does not have a slave
D
7
A
0
D
6
D
5
D
4
D
3
D
2
D
1
D
0
1000 0ID
2
ID
1
ID
0
0
ICW3 (SLAVE DEVICE)
SLAVE ID (NOTE)
01 5234 67
01 1010 01
00 0110 11
00 1001 11
D
7
A
0
D
6
D
5
D
4
D
3
D
2
D
1
D
0
1 0 0 0 BUF M/S AEOI µPMSFNM
ICW4
1 = 8086/8088 mode
0 = MCS-80/85 mode
1 = Auto EOI
0 = Normal EOI
0
1
11
0
X - Non buffered mode
- Buffered mode slave
- Buffered mode master
1 = Special fully nested moded
0 = Not special fully nested mode
FIGURE 7. 82C59A INITIALIZATION COMMAND WORD FORMAT
NOTE: Slave ID is equal to the corresponding master IR input.
82C59A
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