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8.7 Register Description
8.7.1 DMA_STATUS - DMA Status Registers
Offset
0x000
Reset
Access
Name
Bit Position
Bit
Name
Reset
Access
Description
31:21
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
20:16
CHNUM
0x07
R
Channel Number
Number of available DMA channels minus one. Always reads as 7, as there are 8 channels.
15:8
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
7:4
STATE
0x0
R
Control Current State
State can be one of the following. Higher values (11-15) are undefined.
Value
0
1
2
3
4
5
6
7
8
9
10
Mode
IDLE
RDCHCTRLDATA
RDSRCENDPTR
RDDSTENDPTR
RDSRCDATA
WRDSTDATA
WAITREQCLR
WRCHCTRLDATA
STALLED
DONE
PERSCATTRANS
Description
Idle
Reading channel controller data
Reading source data end pointer
Reading destination data end pointer
Reading source data
Writing destination data
Waiting for DMA request to clear
Writing channel controller data
Stalled
Done
Peripheral scatter-gather transition
3:1
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
0
EN
0
R
DMA Enable Status
When this bit is 1, the DMA is enabled.
8.7.2 DMA_CONFIG - DMA Configuration Register
Offset
0x004
Reset
Access
Name
Bit Position
Bit
Name
Reset
Access
Description
31:6
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
5
CHPROT
2011-04-12 - d0001_Rev1.10
0
W
60
Channel Protection Control
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