Figure 181. Control Circuit In Normal Mode, Internal Clock Divided By 1; Figure 182. Ti2 External Clock Connection Example - ST STM32G0 1 Series Reference Manual

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General-purpose timers (TIM2/TIM3/TIM4)

Figure 181. Control circuit in normal mode, internal clock divided by 1

Counter clock = CK_CNT = CK_PSC

Counter register

External clock source mode 1

This mode is selected when SMS=111 in the TIMx_SMCR register. The counter can count at

each rising or falling edge on a selected input.

1. Codes ranging from 01000 to 11111: ITRy.

For example, to configure the upcounter to count in response to a rising edge on the TI2

input, use the following procedure:

Select the proper TI2x source (internal or external) with the TI2SEL[3:0] bits in the

TIMx_TISEL register.

Configure channel 2 to detect rising edges on the TI2 input by writing CC2S= '01 in the

TIMx_CCMR1 register.

Configure the input filter duration by writing the IC2F[3:0] bits in the TIMx_CCMR1

Internal clock

TI2F_Falling

RM0444 Rev 5

External clock

External clock

Internal clock

(internal clock)

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