ST STM32WL5 Series User Manual

RM0453 Rev 1 1001/1461
RM0453 Real-time clock (RTC)
1057
The triggers outputs can be used as triggers for other peripherals.
32.3.3 GPIOs controlled by the RTC and TAMP
The GPIOs included in the Battery Backup Domain (V
BAT
) are directly controlled by the
peripherals providing functions on these I/Os, whatever the GPIO configuration.
Both RTC and TAMP peripherals provide functions on these I/Os (refer to Section 33:
Tamper and backup registers (TAMP)).
RTC_OUT1, RTC_TS and TAMP_IN1 are mapped on the same pin (PC13). The RTC and
TAMP functions mapped on PC13 are available in all low-power modes and in V
BAT
mode.
The output mechanism follows the priority order shown in Table 210.
Table 209. RTC interconnection
Signal name Source/destination
rtc_its From power controller (PWR): main power loss/switch to V
BAT
detection output
rtc_tamp_evt From TAMP peripheral: tamp_evt
rtc_calovf To TAMP peripheral: tamp_itamp5
Table 210. PC13 configuration
(1)
PC13 Pin function
OSEL[1:0]
(ALARM output enable)
TAMPOE
(TAMPER output enable)
COE
(CALIB output enable)
OUT2EN
TAMPALRM_TYPE
TAMPALRM_PU
TAMP1E
(TAMP_IN1 input enable)
TSE
(RTC_TS input enable)
TAMPALRM output
Push-Pull
01 or
10 or
11
0
Don’t
care
Don’t
care
00
Don’t
care
Don’t
care
00 1
01 or
10 or
11
1

ST STM32WL5 Series Specifications

General

Brand	ST
Model	STM32WL5 Series
Category	Microcontrollers
Language	English