cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 407

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
DMA Register Descriptions
Slave DMA Channel [3:0] Command (DMA_CH3:0_CMD)
I/O Address
Type
Reset Value
5.13.2.4
I/O Address
Type
Reset Value
5.13.2.5
I/O Address
Type
Reset Value
DACK_SENSE DREQ_SENSE
Bit
1:0
Bit
7:3
1:0
7
6
5
4
3
2
2
7
7
7
Slave DMA Channel [3:0] Software Request (DMA_CH3:0_SFT_REQ)
Slave DMA Channel [3:0] Channel Mask (DMA_CH3:0_CHMSK)
Name
DACK_SENSE
DREQ_SENSE
WR_TIMING
PR_MODE
TM_MODE
DMA_DIS
RSVD
Name
RSVD
DMA_RQ
DMA_CH_SEL
008h
W
xxh
009h
WO
xxh
00Ah
WO
xxh
6
6
6
WR_TIMING
Description
DACK Sense. 0: Active low; 1: Active high.
DREQ Sense. 0: Active high; 1: Active low.
Write Timing. 0: Late write; 1: Extended write.
Priority Mode. 0: Fixed priority; 1: Rotating priority.
Timing Mode. 0: Normal timing; 1: Compressed timing.
DMA Disable. 0: DMA enable for Channels [3:0]; 1: DMA disable for Channels [3:0].
Reserved. Bit 0 must be written with value 0; bit 1 value is don’t care.
Description
Reserved. Write value is don’t care.
DMA Request. Set to 1 to enable DMA request.
DMA Channel Select.
00: Channel 0.
01: Channel 1.
RSVD
RSVD
DMA_CH3:0_SFT_REQ Bit Descriptions
5
5
5
DMA_CH3:0_SFT_REQ Register Map
(Continued)
DMA_CH3:0_CMD Bit Descriptions
DMA_CH3:0_CHMSK Register Map
DMA_CH3:0_CMD Register Map
PR_MODE
4
4
4
407
TM_MODE
3
3
3
10: Channel 2.
11: Channel 3.
CH_MASK
DMA_DIS
DMA_RQ
2
2
2
1
1
1
DMA_CH_SEL
DMA_CH_SEL
RSVD
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0
0
0