ST STM32F207 series User Manual

RM0033 Rev 9 593/1381
RM0033 Real-time clock (RTC)
597
Note: This register can be written only when ALRBWF is set to 1 in RTC_ISR, or in initialization
mode.
This register is write protected. The write access procedure is described in RTC register
write protection on page 574.
22.6.10 RTC write protection register (RTC_WPR)
Address offset: 0x24
Backup domain reset value: 0x0000 0000
22.6.11 RTC time stamp time register (RTC_TSTR)
Address offset: 0x30
Backup domain 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
1514131211109876543210
Reserved
KEY
wwwwwwww
Bits 31:8 Reserved, must be kept at reset value.
Bits 7:0 KEY: Write protection key
This byte is written by software.
Reading this byte always returns 0x00.
Refer to RTC register write protection for a description of how to unlock RTC register write
protection.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Reserved
PM HT[1:0] HU[3:0]
rrrrrrr
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Res.
MNT[2:0] MNU[3:0]
Res.
ST[2:0] SU[3:0]
rrr rrrr rrrrr 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.

ST STM32F207 series Specifications

General

Brand	ST
Model	STM32F207 series
Category	Microcontrollers
Language	English