参数资料
型号: DMA-MC-XP-N2
厂商: Lattice Semiconductor Corporation
文件页数: 19/28页
文件大小: 0K
描述: IP CORE MCDMA CTLR XPGA ISPXPGA
标准包装: 1
系列: *
其它名称: DMAMCXPN2
Lattice Semiconductor
Table 7. Mode Register - 8237 Mode
Bit
Multi-Channel DMA Controller User’s Guide
Description
1:0
3:2
4
5
7:6
00
01
10
11
00
01
10
11
xx
0
1
0
1
10
01
10
11
Channel 0 select
Channel 1 select
Channel 2 select
Channel 3 select
Verify transfer
Write transfer
Read transfer
Illegal
If bits 6 & 7 are 11
Auto-initialization disable
Auto-initialization enable
Address increment
Address decrement
Demand mode select
Single mode select
Block mode select
Cascade mode (unsupported)
Table 8. Mask Register: Access All Bits - 8237 Mode
Bit
Description
0
1
2
3
0
1
0
1
0
1
0
1
Channel 0 unmasked
Channel 0 masked
Channel 1 unmasked
Channel 1 masked
Channel 2 unmasked
Channel 2 masked
Channel 3 unmasked
Channel 3 masked
Table 9. Mask Register: Access One Bit - 8237 Mode
Bit
Description
1:0
2
00
01
10
11
0
1
Select channel 0 mask bit
Select channel 1 mask bit
Select channel 2 mask bit
Select channel 3 mask bit
Clear mask bit
Set mask bit
7:3
Don’t care
Table 10. Request Register: Access One Bit - 8237 Mode
Bit
Description
1:0
2
00
01
10
11
0
1
Select channel 0 request bit
Select channel 1 request bit
Select channel 2 request bit
Select channel 3 request bit
Clear request bit
Set request bit
7:3
Don’t care
19
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