STMicroelectronics STM32WLEx Reference Manual page 395

RM0461
Bits 31:14 Reserved, must be kept at reset value.
Bits 13:0 CSOF[13:0]: Clear synchronization overrun event flag
Writing 1 in each bit clears the corresponding overrun flag SOFx in the DMAMUX_CSR
register.
12.6.4 DMAMUX request generator channel x configuration register
(DMAMUX_RGxCR)
Address offset: 0x100 + 0x04 * x (x = 0 to 3)
Reset value: 0x0000 0000
This register shall be written by an unprivileged or privileged write, according to the
privileged mode of the considered DMAMUX request line multiplexer channel y it is
assigned to, and considering that the DMAMUX request generator x channel output is
selected by the y channel of the DMAMUX request line channel (refer to
DMAMUX_CyCR.DMAREQ_ID[7:0] and to the DMAMXUX mapping implementation
section).
31 30 29
Res. Res. Res. Res.
15 14 13
Res. Res. Res. Res.
Bits 31:24 Reserved, must be kept at reset value.
Bits 23:19 GNBREQ[4:0]: Number of DMA requests to be generated (minus 1)
Defines the number of DMA requests to be generated after a trigger event. The actual
number of generated DMA requests is GNBREQ +1.
Note: This field must be written only when GE bit is disabled.
Bits 18:17 GPOL[1:0]: DMA request generator trigger polarity
Defines the edge polarity of the selected trigger input
00: No event, i.e. no trigger detection nor generation.
01: Rising edge
10: Falling edge
11: Rising and falling edges
Bit 16 GE: DMA request generator channel x enable
0: DMA request generator channel x disabled
1: DMA request generator channel x enabled
Bits 15:9 Reserved, must be kept at reset value.
Bit 8 OIE: Trigger overrun interrupt enable
0: Interrupt on a trigger overrun event occurrence is disabled
1: Interrupt on a trigger overrun event occurrence is enabled
Bits 7:5 Reserved, must be kept at reset value.
Bits 4:0 SIG_ID[4:0]: Signal identification
Selects the DMA request trigger input used for the channel x of the DMA request generator
28 27 26 25
Res. Res. Res.
12 11 10 9
Res. Res. Res.
DMA request multiplexer (DMAMUX)
24 23 22
Res. GNBREQ[4:0]
rw rw
8 7 6
OIE Res. Res.
rw
RM0461 Rev 5
21 20 19 18
GPOL[1:0]
rw rw rw rw
5 4 3 2
Res. SIG_ID[4:0]
rw rw rw
17 16
GE
rw rw
1 0
rw rw
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