Rainbow Electronics W90P710CDG - Manual (Page 491)

W90P710CD/W90P710CDG
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The auto-reload operation copies from PWM_CNR0, PWM_CNR1, PWM_CNR2, PWM_CNR3 to
down-counter when down-counter reaches zero. If PWM_CNR0~3 are set as zero, counter will be halt
when counter count to zero. If auto-reload bit is set as zero, counter will be stopped immediately.
6.20.2 Modulate Duty Ratio
The double buffering function allows PWM_CMR written at any point in current cycle. The loaded
value will take effect from next cycle.
6.20.3 Dead Zone Generator
W90P710 PWM is implemented with Dead Zone generator. They are built for power device protection.
This function enables generation of a programmable time gap at the rising of PWM output waveform.
User can program PWM_PPR [31:24] and PWM_PPR [23:16] to determine the Dead Zone interval.