AN4013 datasheet(26/37 Pages) STMICROELECTRONICS

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Advanced features for motor control

AN4013

26/37

DocID022500 Rev 4

4.2

Combined three-phase PWM mode available for

STM32F30x and STM32F3x8

The combined three-phase mode allows generating one to three center-aligned PWM

signals with a single programmable signal ANDed in the middle of the pulses.

Using the 3-bits GC5C[3:1] in the TIMx_CCR5, each channel of the TIM can be a

combination between the original signal and the OC5Ref signal:



If GC5C1 is set, OC1 output is controlled by TIMx_CCR1 and TIMx_CCR5



If GC5C2 is set, OC1 output is controlled by TIMx_CCR2 and TIMx_CCR5



If GC5C3 is set, OC1 output is controlled by TIMx_CCR3 and TIMx_CCR5

The following figure presents an example of this mode

Figure 5. Combined three-phase PWM

To configure the timer in this mode:

Configure the output pin:

Select the output mode by writing CCS bits in CCMRx register.

Select the polarity by writing the CCxP bit in CCER register.

Configure the used channel (1, 2 or/and 3)in PWM mode

configure the frequency, the duty cycle and the polarity.

Select the PWM 1 or 2.

Configure the Channel 5 in PWM mode with the desired parameter (duty cycle)

Select the Combined PWM mode by programming the GC5Cx bits.

Select the Center aligned mode as counting mode

Enable the capture compare.

Enable the counter.

AN4013 데이터시트(PDF) 26 Page - STMicroelectronics