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RM0453
7.4.15
RCC AHB1 peripheral clock enable register (RCC_AHB1ENR)
Address offset: 0x048
Reset value: 0x0000 0000
Access: no wait state, word, half-word and byte access
Note:
When the peripheral clock is not active, the peripheral registers read or write access from
CPU1 is not supported.
31
30
29
Res.
Res.
Res.
Res.
15
14
13
CRC
Res.
Res.
Res.
Bits 31:13 Reserved, must be kept at reset value.
Bit 12 CRCEN: CPU1 CRC clock enable
Bits 11:3 Reserved, must be kept at reset value.
Bit 2 DMAMUX1EN: CPU1 DMAMUX1 clock enable
Bit 1 DMA2EN: CPU1 DMA2 clock enable
Bit 0 DMA1EN: CPU1 DMA1 clock enable
28
27
26
25
Res.
Res.
Res.
12
11
10
9
Res.
Res.
Res.
EN
rw
This bit is set and cleared by software.
0: CRC clock disabled for CPU1
1: CRC clock enabled for CPU1
This bit is set and cleared by software.
0: DMAMUX1 clock disabled for CPU1
1: DMAMUX1 clock enabled for CPU1
This bit is set and cleared by software.
0: DMA2 clock disabled for CPU1
1: DMA2 clock enabled for CPU1
This bit is set and cleared by software.
0: DMA1 clock disabled for CPU1
1: DMA1 clock enabled for CPU1
24
23
22
Res.
Res.
Res.
8
7
6
Res.
Res.
Res.
RM0453 Rev 5
Reset and clock control (RCC)
21
20
19
18
Res.
Res.
Res.
Res.
5
4
3
2
DMA
Res.
Res.
Res.
MUX1
EN
rw
17
16
Res.
Res.
1
0
DMA2
DMA1
EN
EN
rw
rw
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