STM32F101xx, STM32F102xx, STM32F103xx, STM32F105xx and ...

General-purpose timer (TIMx)
RM0008
Figure 102. Counter timing diagram, internal clock divided by 1
CK_INT
CNT_EN
Timer clock = CK_CNT
Counter register
31
32 33 34 35 36 00 01 02 03 04 05 06 07
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
Figure 103. Counter timing diagram, internal clock divided by 2
CK_INT
CNT_EN
Timer clock = CK_CNT
Counter register
0034 0035 0036 0000 0001 0002 0003
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
Figure 104. Counter timing diagram, internal clock divided by 4
CK_INT
CNT_EN
TImer clock = CK_CNT
Counter register
0035 0036
0000 0001
Counter overflow
Update event (UEV)
Update interrupt flag (UIF)
324/995 Doc ID 13902 Rev 9