General-purpose timers (TIM15/TIM16/TIM17) RM0351
1064/1830 DocID024597 Rev 5
Figure 331. Update rate examples depending on mode and TIMx_RCR register
settings
32.4.4 Clock selection
The counter clock can be provided by the following clock sources:
• Internal clock (CK_INT)
• External clock mode1: external input pin
• Internal trigger inputs (ITRx) (only for TIM15): using one timer as the prescaler for
another timer, for example, you can configure TIM1 to act as a prescaler for TIM15.
Refer to Using one timer as prescaler for another timer on page 1022 for more details.
Internal clock source (CK_INT)
If the slave mode controller is disabled (SMS=000), then the CEN (in the TIMx_CR1
register) and UG bits (in the TIMx_EGR register) are actual control bits and can be changed
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