Figure 41. Counter Timing Diagram With Prescaler Division Change From 1 To 2; Figure 42. Counter Timing Diagram With Prescaler Division Change From 1 To 4 - ST STM32F100 Series Reference Manual

Advanced-control timer (TIM1)

Figure 41. Counter timing diagram with prescaler division change from 1 to 2

Timerclock = CK_CNT
Counter register
Update event (UEV)
Prescaler control register
Prescaler buffer
Prescaler counter

Figure 42. Counter timing diagram with prescaler division change from 1 to 4

Timerclock = CK_CNT
Update event (UEV)
Prescaler control register
Prescaler counter
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CK_PSC
CEN
F7
Write a new value in TIMx_PSC
CK_PSC
CEN
Counter register
Write a new value in TIMx_PSC
Prescaler buffer
F8 F9 FA FB FC
0
0
0
F7 F8 F9 FA FB
0
0
0
RM0041 Rev 6
01
00
1
1
0 1 0
1 0
FC 00
3
3
0 1 2 3 0
RM0041
02
03
1 1
0
MS31076V2
01
1 2 3
MS31077V2