Figure 19. Frequency Measurement With Tim16 In Capture Mode; Figure 20. Frequency Measurement With Tim17 In Capture Mode - ST STM32L4 5 Series Reference Manual

Reset and clock control (RCC)
The input capture channel of the Timer 16 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 the following ones:
•
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 should be enabled.
The input capture channel of the Timer 17 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 TIM17_OR register.
The possibilities are the following ones:
•
TIM17 Channel1 is connected to the GPIO. Refer to the alternate function mapping in
the device datasheets.
• TIM17 Channel1 is connected to the MSI Clock.
•
TIM17 Channel1 is connected to the HSE/32 Clock.
• TIM17 Channel1 is connected to the microcontroller clock output (MCO), this selection
is controlled by the MCO[2:0] (or MCOSEL[3:0] for STM32L496xx/4A6xx devices) bits
of the Clock configuration register (RCC_CFGR).
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Figure 19. Frequency measurement with TIM16 in capture mode

Figure 20. Frequency measurement with TIM17 in capture mode

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