ESP32-C3 datasheet(22/44 Pages) ESPRESSIF

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Functional Description

3.4.5 I2S Interface

ESP32-C3 includes a standard I2S interface. This interface can operate as a master or a slave in full-duplex

mode or half-duplex mode, and can be configured for 8-bit, 16-bit, 24-bit, or 32-bit serial communication. BCK

clock frequency, from 10 kHz up to 40 MHz, is supported.

The I2S interface supports TDM PCM, TDM MSB alignment, TDM standard, and PDM TX interface. It connects

to the GDMA controller.

3.4.6 Remote Control Peripheral

The Remote Control Peripheral (RMT) supports two channels of infrared remote transmission and two channels

of infrared remote reception. By controlling pulse waveform through software, it supports various infrared and

other single wire protocols. All four channels share a 192 × 32-bit memory block to store transmit or receive

waveform.

3.4.7 LED PWM Controller

The LED PWM controller can generate independent digital waveform on six channels. The LED PWM

controller:

• can generate digital waveform with configurable periods and duty cycle. The accuracy of duty cycle can be

up to 18 bits.

• has multiple clock sources, including APB clock and external main crystal clock.

• can operate when the CPU is in Light-sleep mode.

• supports gradual increase or decrease of duty cycle, which is useful for the LED RGB color-gradient

generator.

3.4.8 General DMA Controller

ESP32-C3 has a general DMA controller (GDMA) with six independent channels, i.e. three transmit channels and

three receive channels. These six channels are shared by peripherals with DMA feature. The GDMA controller

implements a fixed-priority scheme among these channels, whose priority can be configured.

The GDMA controller controls data transfer using linked lists. It allows peripheral-to-memory and

memory-to-memory data transfer at a high speed. All channels can access internal RAM.

Peripherals on ESP32-C3 with DMA feature are SPI2, UHCI0, I2S, AES, SHA, and ADC.

3.4.9 USB Serial/JTAG Controller

ESP32-C3 integrates a USB Serial/JTAG controller. This controller has the following features:

• USB 2.0 full speed compliant, capable of up to 12 Mbit/s transfer speed (Note that this controller does not

support the faster 480 Mbit/s high-speed transfer mode)

• CDC-ACM virtual serial port and JTAG adapter functionality

• programming embedded/external flash

• CPU debugging with compact JTAG instructions

• a full-speed USB PHY integrated in the chip

3.4.10 TWAI® Controller

ESP32-C3 has a TWAI® controller with the following features:

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ESP32-C3 Series Datasheet v1.1

ESP32-C3 Datasheet(PDF) 22 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.