ST STM32F301 6 Series Reference Manual page 338

Advanced-control timer (TIM1)
Timerclock = CK_CNT
Counter register
Counter overflow
Update event (UEV)
Update interrupt flag
Timerclock = CK_CNT
Counter register
Counter overflow
Update event (UEV)
Update interrupt flag
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Figure 95. Counter timing diagram, internal clock divided by 1
CK_PSC
CNT_EN
31
(UIF)
Figure 96. Counter timing diagram, internal clock divided by 2
CK_PSC
CNT_EN
0034
(UIF)
RM0366 Rev 5
32 33 34 35 36 00
0035 0036
01 02 03
04 05
0000 0001 0002
RM0366
06 07
MS31078V2
0003
MS31079V2