Figure 161. Counter Timing Diagram With Prescaler Division Change From 1 To 2; Figure 162. Counter Timing Diagram With Prescaler Division Change From 1 To 4 - ST STM32F207 Series Reference Manual

Advanced arm-based 32-bit mcus
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RM0033

Figure 161. Counter timing diagram with prescaler division change from 1 to 2

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

Figure 162. Counter timing diagram with prescaler division change from 1 to 4

Timerclock = CK_CNT
Update event (UEV)
Prescaler control register
Prescaler counter
CK_PSC
CEN
F7
Write a new value in TIMx_PSC
Prescaler buffer
CK_PSC
CEN
Counter register
Write a new value in TIMx_PSC
Prescaler buffer
General-purpose timers (TIM9 to TIM14)
F8
F9
FA FB
FC
0
0
0
F7
F8
F9
FA FB
0
0
0
RM0033 Rev 9
01
00
1
1
0
1
0
1
0
FC
00
3
3
0
1
2
3
0
02
03
1
1
0
MS31076V2
01
1
2
3
MS31077V2
441/1381
483

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