Figure 25. Frequency Measurement With Tim16 In Capture Mode; Figure 26. Frequency Measurement With Tim17 In Capture Mode - STMicroelectronics STM32WLEx Reference Manual

Reset and clock control (RCC)
6.2.20 Internal/external clock measurement with TIM16/TIM17
The frequency of all on-board clock sources can be indirectly measured by mean of the
TIM16 or TIM17 channel 1 input capture, as shown in
The TIM16 input capture channel can be a GPIO line or an internal clock of the MCU. This
selection is performed through the TI1_RMP[1:0] bits in the TIM16_OR register. The
possibilities are listed below:
• TIM16 channel1 is connected to the GPIO (refer to the alternate function mapping in
the device datasheets).
•
TIM16 channel1 is connected to the LSI clock.
•
TIM16 channel1 is connected to the LSE clock.
•
TIM16 channel1 is connected to the RTC wakeup interrupt signal. In this case the RTC
interrupt must be enabled.
246/1306

Figure 25. Frequency measurement with TIM16 in capture mode

GPIO
LSI
LSE
RTC wakeup interrupt

Figure 26. Frequency measurement with TIM17 in capture mode

GPIO
MSI
HSE/32
MCO
RM0461 Rev 5
Figure 25
TIM16
TI1_RMP[1:0]
TI1
TIM17
TI1_RMP[1:0]
TI1
RM0461
and Figure 26.
MS33434V1
MS33435V1