Reset and clock control (RCC) RM0453
356/1454 RM0453 Rev 2
7.4.47 RCC register map
The following table gives the RCC register map and the reset values.
Table 63. RCC register map and reset values
Off-
set
Register
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0x000
RCC_CR
Res.
Res.
Res.
Res.
Res.
Res.
PLLRDY
PLLON
Res.
Res.
HSEBYPPWR
HSEPRE
CSSON
Res.
HSERDY
HSEON
Res.
Res.
Res.
HSIKERDY
HSIASFS
HSIRDY
HSIKERON
HSION
MSIRANGE[3:0]
MSIRGSEL
MSIPLLEN
MSIRDY
MSION
Reset value
00 0 00 00 0000001100001
0x004
RCC_ICSCR
Res.
HSITRIM[6:0] HSICAL[7:0] MSITRIM[7:0] MSICAL[7:0]
Reset value
1000000xx x xxxxx00000000xxxxxxxx
0x008
RCC_CFGR
Res.
MCOPRE[2:0]
MCOSEL[3:0]
Res.
Res.
Res.
Res.
Res.
PPRE2F
PPRE1F
HPREF
STOPWUCK
Res.
PPRE2[2:0]
PPRE1[2:0]
HPRE[3:0]
SWS[1:0]
SW[1:0]
Reset value
0000000 1110 00000000000000
0x00C
RCC_
PLLCFGR
PLLR[2:0]
PLLREN
PLLQ[2:0]
PLLQEN
Res.
Res.
PLLP[4:0]
PLLPEN
Res.
PLLN[6:0]
Res.
PLLM[2:0]
Res.
Res.
PLLSRC[1:0]
Reset value
00100010 0 00100 0000001 000 00
0x010
to
0x014
Reserved
Reserved
0x018
RCC_CIER
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
LSECSSIE.
Res.
Res.
Res.
PLLRDYIE
HSERDYIE
HSIRDYIE
MSIRDYIE
LSERDYIE
LSIRDYIE
Reset value
0 000000
0x01C
RCC_CIFR
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
LSECSSF
CSSF
Res.
Res.
PLLRDYF
HSERDYF
HSIRDYF
MSIRDYF
LSERDYF
LSIRDYF
Reset value
00 000000
0x020
RCC_CICR
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
LSECSSC
CSSC
Res.
Res.
PLLRDYC
HSERDYC
HSIRDYC
MSIRDYC
LSERDYC
LSIRDYC
Reset value
00 000000
0x024 Reserved
Reserved
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