RM0090: Reference manual - STMicroelectronics

RM0090 General-purpose timers (TIM9 to TIM14)
Figure 171. 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)
0035 0036
Figure 172. Counter timing diagram, internal clock divided by N
CK_PSC
Timer clock = CK_CNT
Counter register 1F 20
00
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
0000 0001
Figure 173. Counter timing diagram, update event when ARPE=0 (TIMx_ARR not
preloaded)
CK_PSC
CEN
Timer clock = CK_CNT
Counter register
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
31
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
Doc ID 018909 Rev 3 484/1416