MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 377

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RM0008
Prescaler description
The prescaler can divide the counter clock frequency by any factor between 1 and 65536. It
is based on a 16-bit counter controlled through a 16-bit register (in the TIMx_PSC register).
It can be changed on the fly as the TIMx_PSC control register is buffered. The new
prescaler ratio is taken into account at the next update event.
Figure 146
ratio is changed on the fly.
Figure 146. Counter timing diagram with prescaler division change from 1 to 2
Figure 147. Counter timing diagram with prescaler division change from 1 to 4
and
Prescaler control register
Figure 147
Timer clock = CK_CNT
Prescaler control register
Update event (UEV)
Prescaler counter
Timer clock = CK_CNT
Prescaler buffer
Counter register
Update event (UEV)
Prescaler counter
Prescaler buffer
Write a new value in TIMx_PSC
Counter register
give some examples of the counter behavior when the prescaler
CK_PSC
CNT_EN
Write a new value in TIMx_PSC
Doc ID 13902 Rev 9
CK_PSC
CNT_EN
F7
0
0
0
F7
F8
0
0
0
F9 FA FB FC
F8
F9 FA FB FC
0
00
1
0
0 1
01
1
00
Basic timers (TIM6&TIM7)
2 3
1
1
0 1
02
3
3
0 1
0 1
03
01
2 3
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