ST STM32WL55JC Reference Manual page 468

Direct memory access controller (DMA)
13.6.2 DMA interrupt flag clear register (DMA_IFCR)
Address offset: 0x04
Reset value: 0x0000 0000
This register may mix secure and non secure information, depending on the secure mode of
each channel (SECM bit of the DMA_CCRx register).
A secure software is able to set any flag clear bit of the DMA_IFCR, and order DMA
hardware to clear any corresponding flag(s) in the DMA_ISR register.
A non-secure software is restricted to order DMA hardware to clear the non-secure flag(s) in
the DMA_ISR, by setting any non-secure corresponding flag clear bit(s) of the DMA_IFCR
register.
This register may mix privileged and unprivileged information, depending on the privileged
mode of each channel (PRIV bit of the DMA_CCRx register).
A privileged software is able to set any flag clear bit of the DMA_IFCR, and order DMA
hardware to clear any corresponding flag(s) in the DMA_ISR register.
An unprivileged software is restricted to order DMA hardware to clear the unprivileged
flag(s) in the DMA_ISR, by setting any unprivileged corresponding flag clear bit(s) of the
DMA_IFCR register.
Setting the global clear bit CGIFx of the channel x in this DMA_IFCR register, causes the
DMA hardware to clear the corresponding GIFx bit and any individual flag among TEIFx,
HTIFx, TCIFx, in the DMA_ISR register.
Setting any individual clear bit among CTEIFx, CHTIFx, CTCIFx in this DMA_IFCR register,
causes the DMA hardware to clear the corresponding individual flag and the global flag
GIFx in the DMA_ISR register, provided that none of the two other individual flags is set.
Writing 0 into any flag clear bit has no effect.
31 30 29 28
Res. Res. Res. Res.
15 14 13 12
w w w
Bits 31:28 Reserved, must be kept at reset value.
Bit 27 CTEIF7: transfer error flag clear for channel 7
Bit 26 CHTIF7: half transfer flag clear for channel 7
Bit 25 CTCIF7: transfer complete flag clear for channel 7
Bit 24 CGIF7: global interrupt flag clear for channel 7
Bit 23 CTEIF6: transfer error flag clear for channel 6
Bit 22 CHTIF6: half transfer flag clear for channel 6
Bit 21 CTCIF6: transfer complete flag clear for channel 6
468/1454
27 26 25
w w w
11 10 9
w w w w
24 23 22
w w w
8 7 6
w w w
RM0453 Rev 2
21 20 19 18
w w w w
5 4 3 2
w w w w
RM0453
17 16
w w
1 0
w w