cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 411

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

Revision 0.8
DMA Register Descriptions
5.13.2.13 DMA Channel [7:4] Status / Command
Master DMA Channel [7:4] Status (DMA_CH7:4_STS)
I/O Address
Type
Reset Value
Master DMA Channel [7:4] Command (DMA_CH7:4_CMD)
I/O Address
Type
Reset Value
DMA_CH7_RQ DMA_CH6_RQ DMA_CH5_RQ DMA_CH4_RQ DMA_CH7_TC DMA_CH6_TC DMA_CH5_TC DMA_CH4_TC
DACK_SENSE DREQ_SENSE
Bit
7:0
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
7
7
Name
DMA_CH_CNT_BYTE
Name
DMA_CH7_RQ
DMA_CH6_RQ
DMA_CH5_RQ
DMA_CH4_RQ
DMA_CH7_TC
DMA_CH6_TC
DMA_CH5_TC
DMA_CH4_TC
Name
DACK_SENSE
DREQ_SENSE
WR_TIMING
PR_MODE
TM_MODE
0D0h
R
00h
0D0h
W
xxh
6
6
WR_TIMING
Description
Channel 7 DMA Request. 0: Not pending; 1: Pending.
Channel 6 DMA Request. 0: Not pending; 1: Pending.
Channel 5 DMA Request. 0: Not pending; 1: Pending.
Channel 4 DMA Request. 0: Not pending; 1: Pending.
Channel 7 Terminal Count. 0: Count not reached; 1: Count reached.
Channel 6 Terminal Count. 0: Count not reached; 1: Count reached.
Channel 5 Terminal Count. 0: Count not reached; 1: Count reached.
Channel 4 Terminal Count. 0: Count not reached; 1: Count reached.
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_CH[x]_CNT_BYTE Bit Descriptions
5
5
(Continued)
DMA_CH7:4_CMD Bit Descriptions
DMA_CH7:4_STS Bit Descriptions
Description
DMA Channel Transfer Count. Read/write in two successive bus cycles, low
byte first.
DMA_CH7:4_CMD Register Map
DMA_CH7:4_STS Register Map
PR_MODE
4
4
411
TM_MODE
3
3
DMA_DIS
2
2
1
1
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