Rtc Backup Registers (Rtc_Bkpxr); Rtc Register Map; Table 135. Rtc Register Map And Reset Values - STMicroelectronics RM0365 Reference Manual

Real-time clock (RTC)
27.6.19

RTC backup registers (RTC_BKPxR)

Address offset: 0x50 to 0x8C
Backup domain reset value: 0x0000 0000
System reset: not affected
31 30 29
rw rw rw
15 14 13
rw rw rw
Bits 31:0 BKP[31:0]
27.6.20

RTC register map

Offset Register
RTC_TR
0x00
Reset value
RTC_DR
0x04
Reset value
RTC_CR
0x08
Reset value
RTC_ISR
0x0C
Reset value
RTC_PRER
0x10
Reset value
RTC_WUTR
0x14
Reset value
RTC_ALRMAR
0x1C
Reset value 0
763/1080
28 27 26 25
rw rw rw rw
12 11 10 9
rw rw rw rw
The application can write or read data to and from these registers.
They are powered-on by V
System reset, and their contents remain valid when the device operates in low-power mode.
This register is reset on a tamper detection event, as long as TAMPxF=1.

Table 135. RTC register map and reset values

0
0
DT
DU[3:0]
[1:0]
0 0 0 0 0 0 0 0
DocID025202 Rev 7
24 23 22
BKP[31:16]
rw rw rw
8 7 6
BKP[15:0]
rw rw rw
when V is switched off, so that they are not reset by
BAT DD
HT
HU[3:0]
[1:0]
0 0 0 0 0 0 0
YT[3:0] YU[3:0] WDU[2:0]
0 0 0 0 0 0 0 0
OSE
L
[1:0]
0 0 0 0 0 0 0
0
PREDIV_A[6:0]
1 1 1 1 1 1 1 0
1
HT
HU[3:0]
[1:0]
0 0 0 0 0 0 0 0
21 20 19
rw rw rw
5 4 3
rw rw rw
MNT[2:0] MNU[3:0]
0 0 0 0 0 0 0
MU[3:0]
0 1 0 0 0 0 1
0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
PREDIV_S[14:0]
0 0 0 0 0 0 0 1
WUT[15:0]
1 1 1 1 1 1 1 1
MNT[2:0] MNU[3:0]
0 0 0 0 0 0 0 0
RM0365
18 17 16
rw rw rw
2 1 0
w rw rw
ST[2:0] SU[3:0]
0 0 0 0 0 0 0
DT
DU[3:0]
[1:0]
0 0 0 0 0 1
WUCKS
EL[2:0]
0 0 0 0 0 0 0
0 0 0 0 1 1 1
1 1 1 1 1 1 1
1 1 1 1 1 1 1
ST[2:0] SU[3:0]
0 0 0 0 0 0 0