RM0090: Reference manual - STMicroelectronics

Advanced-control timers (TIM1&TIM8) RM0090
Figure 76. Counter timing diagram, internal clock divided by 4
CK_PSC
CNT_EN
Timer clock = CK_CNT
Counter register
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
Figure 77. Counter timing diagram, internal clock divided by N
CK_PSC
Timer clock = CK_CNT
Figure 78. Counter timing diagram, update event when ARPE=0 (TIMx_ARR not
preloaded)
355/1416 Doc ID 018909 Rev 3
0035 0036
Counter register 1F 20
00
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
CK_PSC
CEN
Timer clock = CK_CNT
Counter register
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
31
0000 0001
32 33 34 35 36 00 01 02 03 04 05 06 07
Auto-reload register FF 36
Write a new value in TIMx_ARR