ESP32-PICO datasheet(34/64 Pages) ESPRESSIF

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4 Peripherals

Pin Assignment

The pins for the Two-wire Automotive Interface 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.

4.2.13

Ethernet MAC Interface

An IEEE-802.3-2008-compliant Media Access Controller (MAC) is provided for Ethernet LAN communications.

ESP32 requires an external physical interface device (PHY) to connect to the physical LAN bus (twisted-pair,

fiber, etc.). The PHY is connected to ESP32 through 17 signals of MII or nine signals of RMII.

Feature List

• 10 Mbps and 100 Mbps rates

• Dedicated DMA controller allowing high-speed transfer between the dedicated SRAM and Ethernet MAC

• Tagged MAC frame (VLAN support)

• Half-duplex (CSMA/CD) and full-duplex operation

• MAC control sublayer (control frames)

• 32-bit CRC generation and removal

• Several address-filtering modes for physical and multicast address (multicast and group addresses)

• 32-bit status code for each transmitted or received frame

• Internal FIFOs to buffer transmit and receive frames. The transmit FIFO and the receive FIFO are both 512

words (32-bit)

• Hardware PTP (Precision Time Protocol) in accordance with IEEE 1588 2008 (PTP V2)

• 25 MHz/50 MHz clock output

For details, see ESP32 Technical Reference Manual > Chapter Ethernet Media Access Controller (MAC).

Pin Assignment

For information about the pin assignment of Ethernet MAC Interface, see ESP32 Series Datasheet > Section

Peripheral Pin Configurations and ESP32 Technical Reference Manual > Chapter IO_MUX and GPIO

Matrix.

4.3

Analog Peripherals

4.3.1 Analog-to-Digital Converter (ADC)

ESP32 integrates two 12-bit SAR ADCs and supports measurements on 18 channels (analog-enabled pins).

The ULP coprocessor in ESP32 is also designed to measure voltage, while operating in the sleep mode, which

enables low-power consumption. The CPU can be woken up by a threshold setting and/or via other

triggers.

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ESP32-PICO Series Datasheet v1.1

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