RM0090: Reference manual - STMicroelectronics

RM0090 General-purpose timers (TIM2 to TIM5)
Figure 134. Counter timing diagram, internal clock divided by 2
CK_INT
CNT_EN
TImer clock = CK_CNT
Counter register
Counter underflow
Update event (UEV)
Update interrupt flag (UIF)
Figure 135. Counter timing diagram, internal clock divided by 4, TIMx_ARR=0x36
CK_INT
CNT_EN
Timer clock = CK_CNT
Counter register
Counter overflow (cnt_ovf)
Update event (UEV)
Update interrupt flag (UIF)
1. Center-aligned mode 2 or 3 is used with an UIF on overflow.
0003 0002 0001 0000 0001 0002 0003
0034 0035
Figure 136. Counter timing diagram, internal clock divided by N
CK_INT
Timer clock = CK_CNT
Counter register 20 1F
01
00
Counter underflow
Update event (UEV)
Update interrupt flag (UIF)
0036 0035
Doc ID 018909 Rev 3 428/1416