![](http://datasheet.mmic.net.cn/Intersil/CS82C59A-1296_datasheet_96756/CS82C59A-1296_12.png)
12
FN2784.5
March 17, 2006
D7
A0
D6
D5
D4
D3
D2
D1
D0
1M7
M6
M5
M3
M2
M1
M0
M4
OCW1
Interrupt Mask
1 = Mask set
0 = Mask reset
D7
A0
D6
D5
D4
D3
D2
D1
D0
0
R
SL
EOI
0
L2
L1
L0
0
OCW2
IR LEVEL TO BE
01
5
23
4
6
7
01
1
01
0
1
00
0
11
0
1
00
1
00
1
00
1
01
1
10
1
10
0
1
0
1
10
0
1
0
Non-specific EOI command
Specific EOI command
Rotate on non-specific EOI command
Rotate in automatic EOI mode (set)
Rotate in automatic EOI mode (clear)
Rotate on specific EOI command
Set priority command
No operation
ACTED UPON
End of interrupt
Automatic rotation
Specific rotation
L0 - L2 are used
D7
A0
D6
D5
D4
D3
D2
D1
D0
0
ESMM
SMM
1
P
RR
RIS
0
OCW3
00
11
1
0
No Action
Read IR reg on
next RD pulse
Read IS reg on
next RD pulse
1 = Poll command
0 = No poll command
00
11
1
0
No Action
Reset special
mask
Set special
mask
READ REGISTER COMMAND
FIGURE 8. 82C59A OPERATION COMMAND WORD FORMAT
SPECIAL MASK MODE
82C59A