ESP32-PICO datasheet(28/64 Pages) ESPRESSIF

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4 Peripherals

• Programmable CPOL and CPHA

• Programmable clock

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

Pin Assignment

For SPI, the pins are multiplexed with GPIO6 ~ GPIO11 via the IO MUX. For HSPI, the pins are multiplexed with

GPIO2, GPIO4, GPIO12 ~ GPIO15 via the IO MUX. For VSPI, the pins are multiplexed with GPIO5, GPIO18 ~

GPIO19, GPIO21 ~ GPIO23 via the IO MUX.

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.

4.2.3 Universal Asynchronous Receiver Transmitter (UART)

The UART in the ESP32 chip facilitates the transmission and reception of asynchronous serial data between

the chip and external UART devices. It consists of two UARTs in the main system, and one low-power LP

UART.

Feature List

• Programmable baud rate

• RAM shared by TX FIFOs and RX FIFOs

• Supports input baud rate self-check

• Support for various lengths of data bits and stop bits

• Parity bit support

• Asynchronous communication (RS232 and RS485) and IrDA support

• Supports DMA to communicate data in high speed

• Supports UART wake-up

• Supports both software and hardware flow control

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

Pin Assignment

The pins for UART 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.

4.2.4

I2C Interface

ESP32 has two I2C bus interfaces which can serve as I2C master or slave, depending on the user’s

configuration.

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ESP32-PICO Series Datasheet v1.1

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