ST STM32G431 User Manual

General-purpose timers (TIM2/TIM3/TIM4/TIM5) RM0440
1260/2126 RM0440 Rev 4
(DIR) in the TIMx_CR1 register is updated by hardware and must not be changed by
software. Refer to Center-aligned mode (up/down counting) on page 1243.
Figure 389 shows some center-aligned PWM waveforms in an example where:
• TIMx_ARR=8,
• PWM mode is the PWM mode 1,
• The flag is set when the counter counts down corresponding to the center-aligned
mode 1 selected for CMS=01 in TIMx_CR1 register.
Figure 389. Center-aligned PWM waveforms (ARR=8)
Hints on using center-aligned mode:
• When starting in center-aligned mode, the current up-down configuration is used. It
means that the counter counts up or down depending on the value written in the DIR bit
MSv62328V1
CCxIF
012345678765432 101
Counter register
CCRx = 4
tim_ocxref
CMS=01
CMS=10
CMS=11
CCxIF
CCRx=7
tim_ocxref
CMS=10 or 11
CCxIF
CCRx=8
tim_ocxref
CMS=01
CMS=10
CMS=11
‘1’
CCxIF
CCRx>8
tim_ocxref
CMS=01
CMS=10
CMS=11
‘1’
CCxIF
CCRx=0
tim_ocxref
CMS=01
CMS=10
CMS=11
‘0’

ST STM32G431 Specifications

General

Brand	ST
Model	STM32G431
Category	Microcontrollers
Language	English