ST STM32WL55JC Reference Manual page 475

RM0453
13.6.5 DMA channel x peripheral address register (DMA_CPARx)
Address offset: 0x10 + 0x14 * (x - 1), (x = 1 to 7)
Reset value: 0x0000 0000
31 30 29 28
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15 14 13 12
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Bits 31:0 PA[31:0]: peripheral address
It contains the base address of the peripheral data register from/to which the data is
read/written.
When PSIZE[1:0] = 01 (16 bits), bit 0 of PA[31:0] is ignored. Access is automatically aligned
to a half-word address.
When PSIZE = 10 (32 bits), bits 1 and 0 of PA[31:0] are ignored. Access is automatically
aligned to a word address.
In memory-to-memory mode, this register identifies the memory destination address if
DIR = 1 and the memory source address if DIR = 0.
In peripheral-to-peripheral mode, this register identifies the peripheral destination address
DIR = 1 and the peripheral source address if DIR = 0.
Note: This register is set and cleared by software (privileged/secure software if the channel is
13.6.6 DMA channel x memory address register (DMA_CMARx)
Address offset: 0x14 + 0x14 * (x - 1), (x = 1 to 7)
Reset value: 0x0000 0000
31 30 29 28
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15 14 13 12
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27 26 25
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11 10 9
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in privileged/secure mode).
It must not be written when the channel is enabled (EN = 1).
It is read-only when the channel is enabled (EN = 1).
27 26 25
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11 10 9
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RM0453 Rev 2
Direct memory access controller (DMA)
24 23 22 21
PA[31:16]
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8 7 6 5
PA[15:0]
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24 23 22 21
MA[31:16]
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8 7 6 5
MA[15:0]
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20 19 18 17
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4 3 2 1
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20 19 18 17
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4 3 2 1
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16
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0
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16
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0
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