ST STM32F40 Series

General-purpose timers (TIM2 to TIM5) RM0090
429/1422 Doc ID 018909 Rev 4
Figure 128. Counter timing diagram, internal clock divided by 1
Figure 129. Counter timing diagram, internal clock divided by 2
Figure 130. Counter timing diagram, internal clock divided by 4
CK_INT
36
CNT_EN
Timer clock = CK_CNT
Counter register
Update interrupt flag (UIF)
Counter underflow (cnt_udf)
Update event (UEV)
35 34 33 32 31 30 2F04 03 02 01 0005
CK_INT
0001 0036 0035 0034 0033
CNT_EN
Timer clock = CK_CNT
Counter register
Update interrupt flag (UIF)
0002
0000
Counter underflow
Update event (UEV)
0036 0035
CNT_EN
Timer clock = CK_CNT
Counter register
Update interrupt flag (UIF)
0001
0000
Counter underflow
Update event (UEV)
CK_INT