Espressif ESP32 Technical Reference Manual page 425

16 Motor Control PWM (PWM)
When the PWM timer is running, it generates the following timing events periodically and automatically:
• UTEP
The timing event generated when the PWM timer's value equals to the value of the period register
(PWM_TIMERx_PERIOD) and when the PWM timer is increasing.
• UTEZ
The timing event generated when the PWM timer's value equals to zero and when the PWM timer is
increasing.
• DTEP
The timing event generated when the PWM timer's value equals to the value of the period register
(PWM_TIMERx_PERIOD) and when the PWM timer is decreasing.
• DTEZ
The timing event generated when the PWM timer's value equals to zero and when the PWM timer is
decreasing.
Figures 16-11 to 16-13 show the timing waveforms of U/DTEP and U/DTEZ.
Espressif Systems
Figure 16-11. UTEP and UTEZ Generation in Count-Up Mode
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425 ESP32 TRM (Version 5.2)