Rtc Tamper And Alternate Function Configuration Register; (Rtc_Tafcr) - STMicroelectronics RM0365 Reference Manual

RM0365
27.6.16

RTC tamper and alternate function configuration register

(RTC_TAFCR)

Address offset: 0x40
Backup domain reset value: 0x0000 0000
System reset: not affected
31 30 29 28
Res. Res. Res. Res.
15 14 13 12
TAMPP TAMPPRCH
TAMPFLT[1:0]
UDIS [1:0]
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1. RTC_TAMP3 is not available on the STM32F302x6/8 devices.
Bits 31:24 Reserved, must be kept at reset value.
Bit 23 PC15MODE: PC15 mode
0: PC15 is controlled by the GPIO configuration registers. Consequently PC15 is floating in
Standby mode.
1: PC15 is forced to push-pull output if LSE is disabled.
Bit 22 PC15VALUE: PC15 value
If the LSE is disabled and PC15MODE = 1, PC15VALUE configures the PC15 output data.
Bit 21 PC14MODE: PC14 mode
0: PC14 is controlled by the GPIO configuration registers. Consequently PC14 is floating in
Standby mode.
1: PC14 is forced to push-pull output if LSE is disabled.
Bit 20 PC14VALUE: PC14 value
If the LSE is disabled and PC14MODE = 1, PC14VALUE configures the PC14 output data.
Bit 19 PC13MODE: PC13 mode
0: PC13 is controlled by the GPIO configuration registers. Consequently PC13 is floating in
Standby mode.
1: PC13 is forced to push-pull output if all RTC alternate functions are disabled.
Bit 18 PC13VALUE: RTC_ALARM output type/PC13 value
If PC13 is used to output RTC_ALARM, PC13VALUE configures the output configuration:
0: RTC_ALARM is an open-drain output
1: RTC_ALARM is a push-pull output
If all RTC alternate functions are disabled and PC13MODE = 1, PC13VALUE configures the
PC13 output data.
Bits 17:16 Reserved, must be kept at reset value.
Bit 15 TAMPPUDIS: RTC_TAMPx pull-up disable
This bit determines if each of the RTC_TAMPx pins are pre-charged before each sample.
0: Precharge RTC_TAMPx pins before sampling (enable internal pull-up)
1: Disable precharge of RTC_TAMPx pins.
27 26 25 24
Res. Res. Res. Res.
11 10 9 8
TAMPFREQ[2:0]
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DocID025202 Rev 7
23 22 21 20
PC15 PC15 PC14 PC14
MODE VALUE MODE VALUE
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7 6 5 4
TAMP3 TAMP3
TAMPT TAMP2
(1) (1)
S TRG
TRG E
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Real-time clock (RTC)
19 18 17
PC13 PC13
Res.
MODE VALUE
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3 2 1
TAMP2 TAMP1
TAMPIE
E TRG
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758/1080
16
Res.
0
TAMP1
E
rw
764