Figure 44. Counter Timing Diagram With Prescaler Division Change From 1 To 2; Figure 45. Counter Timing Diagram With Prescaler Division Change From 1 To 4 - STMicroelectronics STM32F05 series Reference Manual

Advanced-control timers (TIM1)

Figure 44. Counter timing diagram with prescaler division change from 1 to 2

Figure 45. Counter timing diagram with prescaler division change from 1 to 4

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CK_PSC
CEN
Timer clock = CK_CNT
Counter register
Update event (UEV)
Prescaler control register
Write a new value in TIMx_PSC
Prescaler buffer
Prescaler counter
CK_PSC
CEN
Timer clock = CK_CNT
Counter register
Update event (UEV)
Prescaler control register
Write a new value in TIMx_PSC
Prescaler buffer
Prescaler counter
Doc ID 018940 Rev 1
F7 F8 F9 FA FB FC 00
0
0
0 0 1
F7 F8 F9 FA FB FC
0
0
0 1
0
RM0091
01 02 03
1
1
0 1 0 1 0 1
00 01
3
3
2 3 0 1 2 3