st7pmc2s6 STMicroelectronics, st7pmc2s6 Datasheet - Page 95

• Manufacturer Part Number: st7pmc2s6
• Description: 8-bit Mcu For Automotive With Nested Interrupts, Flash, 10-bit Adc, Brushless Motor Control, 5 Timers, Spi, Linsci?
• Manufacturer: STMicroelectronics

ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto
Figure 35. Output compare control
Independent PWM signal generation
This mode allows up to four pulse width modulated signals to be generated on the PWMx output pins with
minimum core processing overhead. This function is stopped during Halt mode.
Each PWMx output signal can be selected independently using the corresponding OEx bit in the PWM
Control register (PWMCR). When this bit is set, the corresponding I/O pin is configured as output push-
pull alternate function.
The PWM signals all have the same frequency which is controlled by the counter period and the ARTARR
register value.
f
When a counter overflow occurs, the PWMx pin level is changed depending on the corresponding OPx
(output polarity) bit in the PWMCR register. When the counter reaches the value contained in one of the
output compare register (OCRx) the corresponding PWMx pin level is restored.
It should be noted that the reload values also affect the value and the resolution of the duty cycle of the
PWM output signal. To obtain a signal on a PWMx pin, the contents of the OCRx register must be greater
than the contents of the ARTARR register.
The maximum available resolution for the PWMx duty cycle is:
Resolution = 1/(256 - ARTARR)
Note:
PWM
= f
PWMDCRx
f
COUNTER
COUNTER
Counter
PWMx
OCRx
To get the maximum resolution (1/256), the ARTARR register must be 0. With this maximum
resolution, 0% and 100% can be obtained by changing the polarity.
/(256 - ARTARR)
FDh
FEh
FDh
ARTARR = FDh
FFh
FDh
FDh
FEh
FFh
FDh
FEh
On-chip peripherals
FEh
FEh
FFh
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