RM0090: Reference manual - STMicroelectronics

RM0090 Real-time clock (RTC)
23.6.13 RTC time stamp time register (RTC_TSTR)
Address offset: 0x30
Power-on reset value: 0x0000 0000
System reset: not affected
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Reserved
PM HT[1:0] HU[3:0]
r r r r r r r
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
MNT[2:0] MNU[3:0] Reserv- ST[2:0] SU[3:0]
r r r r r r r ed r r r r r r r
Bits 31:23 Reserved, must be kept at reset value.
Bit 22 PM: AM/PM notation
0: AM or 24-hour format
1: PM
Bits 21:20 HT[1:0]: Hour tens in BCD format.
Bits 19:16 HU[3:0]: Hour units in BCD format.
Bit 15 Reserved, must be kept at reset value.
Bits 14:12 MNT[2:0]: Minute tens in BCD format.
Bits 11:8 MNU[3:0]: Minute units in BCD format.
Bit 7 Reserved, must be kept at reset value.
Bits 6:4 ST[2:0]: Second tens in BCD format.
Bits 3:0 SU[3:0]: Second units in BCD format.
Note: The content of this register is valid only when TSF is set to 1 in RTC_ISR. It is cleared when
TSF bit is reset.
Doc ID 018909 Rev 3 650/1416