CS5535 Datasheet, PDF (412/555 Pages) National Semiconductor (TI) – Geode™ CS5535 I/O Companion Multi-Function South Bridge

DMA Register Descriptions (Continued)
Bit Name
2
DMA_DIS
1:0 RSVD
DMA_CH7:4_CMD Bit Descriptions (Continued)
Description
DMA Disable. 0: DMA enable for Channels [7:4]; 1: DMA disable for Channels [7:4].
Reserved. Bit 0 must be written with value 0; bit 1 value is don’t care.
5.13.2.14 Master DMA Channel [7:4] Software Request (DMA_CH7:4_SFT_REQ)
I/O Address
0D2h
Type
WO
Reset Value
xxh
DMA_CH7:4_SFT_REQ Register Map
7
6
5
4
3
2
RSVD
DMA_RQ
Bit
Name
7:3 RSVD
2
DMA_RQ
1:0 DMA_CH_SEL
DMA_CH7:4_SFT_REQ Bit Descriptions
Description
Reserved. Write value is don’t care.
DMA Request. Set to 1 to enable DMA request.
DMA Channel Select.
00: Channel 4.
01: Channel 5.
10: Channel 6.
11: Channel 7.
1
0
DMA_CH_SEL
5.13.2.15 Master DMA Channel [7:4] Channel Mask (DMA_CH7:4_CHMSK)
I/O Address
0D4h
Type
WO
Reset Value
xxh
DMA_CH7:4_CHMSK Register Map
7
6
5
4
3
2
RSVD
CH_MASK
1
0
DMA_CH_SEL
Bit Name
7:3 RSVD
2
CH_MASK
1:0 DMA_CH_SEL
DMA_CH7:4_CHMSK Bit Descriptions
Description
Reserved. Write value is don’t care.
Channel Mask. Set to 1 to mask out DMA for selected channel.
DMA Channel Select.
00: Channel 4.
01: Channel 5.
10: Channel 6.
11: Channel 7.
www.national.com
412
Revision 0.8