Table 199. Rtc_Out Mapping - STMicroelectronics STM32WLEx Reference Manual

Real-time clock (RTC)
PC13 Pin function
Wakeup pin or Standard
GPIO
1. OD: open drain; PP: push-pull.
2. In this configuration the GPIO must be configured in input.
In addition, it is possible to output RTC_OUT2 on PA4 pin thanks to OUT2EN bit. This
output is not available in V
on RTC_OUT2 depending on OSEL, COE and OUT2EN configuration, as shown in table
Table 199.
OSEL[1:0] bits
ALARM
output enable)
00
00
01 or 10 or 11
00
00
01 or 10 or 11
01 or 10 or 11
30.3.4 Clock and prescalers
The RTC clock source (RTCCLK) is selected through the clock controller among the LSE
clock, the LSI oscillator clock, and the HSE clock. For more information on the RTC clock
source configuration, refer to "Reset and clock control (RCC)".
892/1306
Table 198. PC13 configuration
00 0
00 0
Don't Don't
care care
mode. The different functions are mapped on RTC_OUT1 or
BAT

Table 199. RTC_OUT mapping

COE bit (CALIB
output enable)
0
1
Don't care
0
1
0
1
RM0461 Rev 5
(1)
(continued)
Don't
0
care
Don't
1
care
1
0
OUT2EN RTC_OUT1 on
bit PC13
0 CALIB
TAMPALRM
1
TAMPALRM
RM0461
Don't
0
care
RTC_OUT2 on
PA4
- -
-
-
- -
- CALIB
- TAMPALRM
CALIB
0