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參數(shù)資料
| 型號： | a8259 |
| 廠商： | Altera Corporation |
| 英文描述： | Programmable Interrupt Controller(可編程中斷控制器) |
| 中文描述： | 可編程中斷控制器（可編程中斷控制器） |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 220K |
| 代理商： | A8259 |
Altera Corporation
67
a8259 Programmable Interrupt Controller Data Sheet
Table 10
describes the interrupt levels acted upon when SL (bit 6 of
OCW 2) is asserted.
Table 11
describes the rotate and EOI commands controlled by bits 5
through 7 of the OCW 2 command register.
OCW 3
OCW 3 is selected by setting the
a0
pin, resetting bit 4 low, and bit 3 high.
Input data for OCW 3 is sent via the
din[7..0]
bus, and the data is
clocked by the rising edge of
clk
.
Table 10. Interrupt Levels for SL (Bit 6 of OCW 2)
Interrupt Level
Mnemonic
L2
L1
L0
0
1
2
3
4
5
6
7
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Table 11. Rotate & EOI Commands Controlled by Bits 5 Through 7 of OCW 2
R
SL
EOI
Command
0
0
1
1
0
1
0
1
0
0
0
1
1
1
1
0
0
1
Non-specific EOI command
Specific EOI command
Rotate on non-specific EOI command
Rotate on automatic EOI mode (set)
Rotate on automatic EOI mode (clear)
Rotate on specific EOI command (L0,
L1, and L2 are used)
Specific priority command (L0, L1, and
L2 are used)
No operation
1
1
0
0
1
0
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