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Real-time clock (RTC)
RM0008
16.4
16.4.1
RTC registers
Refer to Section 1.1 on page 37 for a list of abbreviations used in register descriptions.
RTC control register high (RTC_CRH)
Address offset: 0x00
Reset value: 0x0000
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
OWIE
rw
ALRIE
rw
SECIE
rw
Bits 15:3 Reserved, forced by hardware to 0.
Bit 2 OWIE: Overflow interrupt enable
0: Overflow interrupt is masked.
1: Overflow interrupt is enabled.
Bit 1 ALRIE : Alarm interrupt enable
0: Alarm interrupt is masked.
1: Alarm interrupt is enabled.
Bit 0 SECIE: Second interrupt enable
0: Second interrupt is masked.
1: Second interrupt is enabled.
These bits are used to mask interrupt requests. Note that at reset all interrupts are disabled,
so it is possible to write to the RTC registers to ensure that no interrupt requests are pending
after initialization. It is not possible to write to the RTC_CRH register when the peripheral is
completing a previous write operation (flagged by RTOFF=0, see Section 16.3.4 on page
390 ).
The RTC functions are controlled by this control register. Some bits must be written using a
specific configuration procedure (see Configuration procedure: ).
392/995
Doc ID 13902 Rev 9
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