ST STM32F102 series

RM0008 Advanced-control timers (TIM1&TIM8)
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Figure 67. Update rate examples depending on mode and TIMx_RCR register
settings
Center-aligned mode
Edge-aligned mode
UEV
UEV
UEV
UEV
UEV
Update Event : Preload registers transferred to active registers and update interrupt generated
Counter
TIMx_RCR = 0
TIMx_RCR = 1
TIMx_RCR = 2
TIMx_RCR = 3
Update Event if the repetition counter underflow occurs when the counter is equal to
to the auto-reload value.
UEV
TIMx_RCR = 3
and
re-synchronization
(by SW)
(by SW)
TIMx_CNT
(by SW)
Upcounting Downcounting