Figure 249. Control Circuit In Normal Mode, Internal Clock Divided By 1; Figure 250. Ti2 External Clock Connection Example - STMicroelectronics RM0365 Reference Manual

General-purpose timers (TIM15/TIM16/TIM17)
only by software (except UG which remains cleared automatically). As soon as the CEN bit
is written to 1, the prescaler is clocked by the internal clock CK_INT.
Figure 249
without prescaler.

Figure 249. Control circuit in normal mode, internal clock divided by 1

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.
631/1080
shows the behavior of the control circuit and the upcounter in normal mode,

Figure 250. TI2 external clock connection example

DocID025202 Rev 7
RM0365