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AT32F413
Series Reference Manual
2022.06.27
Page 116
Rev 2.00
9.4.4
DMA channelx number of data register (DMA_CxDTCNT)
(x = 1
…
7)
Accessible: no-wait state, byte, half-word and word.
Bit
Register
Reset value
Type
Description
Bit 31: 16 Reserved
0x0000
resd
Kept at its default value.
Bit 15: 0
CNT
0x0000
rw
Number of data to transfer
The number of data to transfer is from 0x0 to 0xFFFF. This
register can only written when the CHEN bit in the
correspoinding channel is set 0. The value is decremented
after each DMA transfer.
Note: This register holds the number of data to transfer,
instead of transfer size. The transfer size is calculated by
data width.
9.4.5
DMA channelx peripheral address register
(DMA_CxPADDR) (x = 1
…
7)
Accessible: no-wait state, byte, half-word and word.
Bit
Register
Reset value
Type
Description
Bit 31: 0
PADDR
0x0000 0000 rw
Peripheral base address
Base address of peripheral data register is the source or
destination of data transfer.
Note: The register can only be written when the CHEN bit
in the corresponding channel is set 0.
9.4.6
DMA channelx memory address register
(DMA_CxMADDR) (x = 1
…
7)
Accessible: no-wait state, byte, half-word and word.
Bit
Register
Reset value
Type
Description
Bit 31: 0
MADDR
0x0000 0000 rw
Memory base address
Memory address is the source or destination of data
transfer.
Note: The register can only be written when the CHEN bit
in the corresponding channel is set 0.
9.4.7
Channel source register (DMA_SRC_SEL0)
Accessible: no-wait state, byte, half-word and word.
Bit
Register
Reset value
Type
Description
Bit 31: 24 CH4_SRC
0x00
rw
CH4 source select
When DMA_FLEX_EN=1, CH4_SRC selects channel 4
source, please refer to
Bit 23: 16 CH3_SRC
0x00
rw
CH3 source select
When DMA_FLEX_EN=1, CH3_SRC selects channel 3
source, please refer to
Bit 15: 8
CH2_SRC
0x00
rw
CH2 source select
When DMA_FLEX_EN=1, CH2_SRC selects channel 2
source, please refer to
Bit 7: 0
CH1_SRC
0x00
rw
CH1 source select
When DMA_FLEX_EN=1, CH1_SRC selects channe 1
source, please refer to