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.. espressif-soc-esp32-features

ESP32 Features

• Dual core Xtensa microprocessor (LX6), running at 160 or 240MHz

• 520KB of SRAM

• 802.11b/g/n/e/i

• Bluetooth v4.2 BR/EDR and BLE

• Various peripherals:

  • 12-bit ADC with up to 18 channels
  • 2x 8-bit DACs
  • 10x touch sensors
  • 4x SPI
  • 2x I2S
  • 2x I2C
  • 3x UART
  • SD/SDIO/MMC host
  • Slave (SDIO/SPI)
  • Ethernet MAC
  • CAN bus 2.0
  • IR (RX/TX)
  • Motor PWM
  • LED PWM with up to 16 channels
  • Hall effect sensor
  • Temperature sensor

• Cryptographic hardware acceleration (RNG, ECC, RSA, SHA-2, AES)

• 5uA deep sleep current

Asymmetric Multiprocessing (AMP)

Boards featuring the ESP32 and ESP32-S3 SoC allows 2 different applications to be executed. Due to its dual-core architecture, each core can be enabled to execute customized tasks in stand-alone mode and/or exchanging data over OpenAMP framework. See :zephyr:code-sample-category:ipc folder as code reference.

.. note::

** AMP and serial output support **

In the current Zephyr ESP32 implementation, access to Zephyr-managed serial drivers (such as printk(), logging, or the console UART) is not yet implemented for applications running on the APPCPU. As a result, serial output APIs provided by Zephyr are only available on the PROCPU.

As a mitigation, applications running on the APPCPU may use ESP32 ROM functions such as ets_printf() to emit diagnostic or debug output.

For more information, check the ESP32 Datasheet_ or the ESP32 Technical Reference Manual_.

.. _ESP32 Datasheet: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf .. _ESP32 Technical Reference Manual: https://www.espressif.com/sites/default/files/documentation/esp32_technical_reference_manual_en.pdf