參數(shù)資料
型號(hào): a8237
廠商: Altera Corporation
英文描述: programmable DMA Controller(可編程DMA控制器)
中文描述: 可編程DMA控制器(可編程DMA的控制器)
文件頁(yè)數(shù): 12/22頁(yè)
文件大?。?/td> 269K
代理商: A8237
16
Altera Corporation
a8237 Programmable DMA Controller Data Sheet
Single Request Bit Command
The single request bit command alters a single bit of the 4-bit request
register. See
Table 8
.
Note:
(1)
The X indicates “don’t care.”
Single Mask Bit Command
The single mask bit command alters a single bit of the 4-bit mask register.
See
Table 9
.
Note:
(1)
The X indicates “don’t care.”
Table 8. Single Request Bit Command Format
Bit
Description
1..0
00 = Channel 0 select
01 = Channel 1 select
10 = Channel 2 select
11 = Channel 3 select
0 = Reset request bit
1 = Set request bit
XXXXX during write,
Note (1)
2
7..3
Table 9. Single Mask Bit Command Format
Bit
Description
1..0
00 = Channel 0 mask bit select
01 = Channel 1 mask bit select
10 = Channel 2 mask bit select
11 = Channel 3 mask bit select
0 = Reset mask bit
1 = Set mask bit
XXXXX during write,
Note (1)
2
7..3
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