Figure 139. Counter Timing Diagram, Update Event When Arpe=0 (Timx_Arr Not Preloaded); Figure 140. Counter Timing Diagram, Update Event When Arpe=1 (Timx_Arr Preloaded) - STMicroelectronics RM0365 Reference Manual

Advanced-control timers (TIM1)
Figure 139. Counter timing diagram, update event when ARPE=0 (TIMx_ARR not
Figure 140. Counter timing diagram, update event when ARPE=1 (TIMx_ARR
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preloaded)
preloaded)
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RM0365