ESP32-PICO datasheet(31/64 Pages) ESPRESSIF

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4 Peripherals

• Adjustable phase of PWM signal output

• PWM duty cycle dithering

• Automatic duty cycle fading

For details, see ESP32 Technical Reference Manual > Chapter LED PWM Controller.

Pin Assignment

The pins for the LED PWM Controller can be chosen from any GPIOs via the GPIO Matrix.

For more information about the pin assignment, see ESP32 Series Datasheet > Section Peripheral Pin

Configurations and ESP32 Technical Reference Manual > Chapter IO_MUX and GPIO Matrix.

4.2.9 Motor Control PWM

The Pulse Width Modulation (PWM) controller can be used for driving digital motors and smart lights. The

controller consists of PWM timers, the PWM operator and a dedicated capture sub-module. Each timer

provides timing in synchronous or independent form, and each PWM operator generates a waveform for one

PWM channel. The dedicated capture sub-module can accurately capture events with external timing.

Feature List

• Three PWM timers for precise timing and frequency control

– Every PWM timer has a dedicated 8-bit clock prescaler

– The 16-bit counter in the PWM timer can work in count-up mode, count-down mode, or

count-up-down mode

– A hardware sync can trigger a reload on the PWM timer with a phase register. It will also trigger the

prescaler’ restart, so that the timer’s clock can also be synced, with selectable hardware

synchronization source

• Three PWM operators for generating waveform pairs

– Six PWM outputs to operate in several topologies

– Configurable dead time on rising and falling edges; each set up independently

– Modulating of PWM output by high-frequency carrier signals, useful when gate drivers are insulated

with a transformer

• Fault Detection module

– Programmable fault handling in both cycle-by-cycle mode and one-shot mode

– A fault condition can force the PWM output to either high or low logic levels

• Capture module for hardware-based signal processing

– Speed measurement of rotating machinery

– Measurement of elapsed time between position sensor pulses

– Period and duty cycle measurement of pulse train signals

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ESP32-PICO Series Datasheet v1.1

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