RM0090: Reference manual - STMicroelectronics

General-purpose timers (TIM2 to TIM5) RM0090
Figure 137. Counter timing diagram, Update event with ARPE=1 (counter underflow)
CK_INT
CNT_EN
Timer clock = CK_CNT
Counter register
Counter underflow
Update event (UEV)
Update interrupt flag (UIF)
Figure 138. Counter timing diagram, Update event with ARPE=1 (counter overflow)
429/1416 Doc ID 018909 Rev 3
06
05 04 03 02 01 00 01 02 03 04 05 06 07
Auto-reload preload register FD 36
Write a new value in TIMx_ARR
Auto-reload active register FD 36
CK_INT
CNT_EN
Timer clock = CK_CNT
Counter register
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
F7
F8 F9 FA FB FC 36 35 34 33 32 31 30 2F
Auto-reload preload register FD 36
Write a new value in TIMx_ARR
Auto-reload active register FD 36