Data Sheet
Table Of Contents
- 1 Overview
- 2 Pin Definitions
- 3 Functional Description
- 4 Peripherals and Sensors
- 4.1 Descriptions of Peripherals and Sensors
- 4.1.1 General Purpose Input / Output Interface (GPIO)
- 4.1.2 Analog-to-Digital Converter (ADC)
- 4.1.3 Hall Sensor
- 4.1.4 Digital-to-Analog Converter (DAC)
- 4.1.5 Touch Sensor
- 4.1.6 Ultra-Low-Power Co-processor
- 4.1.7 Ethernet MAC Interface
- 4.1.8 SD/SDIO/MMC Host Controller
- 4.1.9 SDIO/SPI Slave Controller
- 4.1.10 Universal Asynchronous Receiver Transmitter (UART)
- 4.1.11 I²C Interface
- 4.1.12 I²S Interface
- 4.1.13 Infrared Remote Controller
- 4.1.14 Pulse Counter
- 4.1.15 Pulse Width Modulation (PWM)
- 4.1.16 LED PWM
- 4.1.17 Serial Peripheral Interface (SPI)
- 4.1.18 Accelerator
- 4.2 Peripheral Pin Configurations
- 4.1 Descriptions of Peripherals and Sensors
- 5 Electrical Characteristics
- 6 Package Information
- 7 Part Number and Ordering Information
- 8 Learning Resources
- Appendix A – ESP32 Pin Lists
- Revision History
2 Pin Definitions
Name No. Type Function
GPIO2 22 I/O GPIO2, ADC2_CH2, RTC_GPIO12, TOUCH2, HSPIWP, HS2_DATA0, SD_DATA0
GPIO0 23 I/O GPIO0, ADC2_CH1, RTC_GPIO11, TOUCH1, EMAC_TX_CLK, CLK_OUT1,
GPIO4 24 I/O GPIO4, ADC2_CH0, RTC_GPIO10, TOUCH0, EMAC_TX_ER, HSPIHD, HS2_DATA1, SD_DATA1
VDD_SDIO
GPIO16 25 I/O GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
VDD_SDIO 26 P Output power supply: 1.8 V or the same voltage as VDD3P3_RTC
GPIO17 27 I/O GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
SD_DATA_2 28 I/O GPIO9, HS1_DATA2, U1RXD, SD_DATA2, SPIHD
SD_DATA_3 29 I/O GPIO10, HS1_DATA3, U1TXD, SD_DATA3, SPIWP
SD_CMD 30 I/O GPIO11, HS1_CMD, U1RTS, SD_CMD, SPICS0
SD_CLK 31 I/O GPIO6, HS1_CLK, U1CTS, SD_CLK, SPICLK
SD_DATA_0 32 I/O GPIO7, HS1_DATA0, U2RTS, SD_DATA0, SPIQ
SD_DATA_1 33 I/O GPIO8, HS1_DATA1, U2CTS, SD_DATA1, SPID
VDD3P3_CPU
GPIO5 34 I/O GPIO5, HS1_DATA6, VSPICS0, EMAC_RX_CLK
GPIO18 35 I/O GPIO18, HS1_DATA7, VSPICLK
GPIO23 36 I/O GPIO23, HS1_STROBE, VSPID
VDD3P3_CPU 37 P Input power supply for CPU IO (1.8 V ∼ 3.6 V)
GPIO19 38 I/O GPIO19, U0CTS, VSPIQ, EMAC_TXD0
GPIO22 39 I/O GPIO22, U0RTS, VSPIWP, EMAC_TXD1
U0RXD 40 I/O GPIO3, U0RXD, CLK_OUT2
U0TXD 41 I/O GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2
GPIO21 42 I/O GPIO21, VSPIHD, EMAC_TX_EN
Analog
VDDA 43 P Analog power supply (2.3 V ∼ 3.6 V)
XTAL_N 44 O External crystal output
XTAL_P 45 I External crystal input
VDDA 46 P Analog power supply (2.3 V ∼ 3.6 V)
CAP2 47 I Connects to a 3.3 nF (10%) capacitor and 20 kΩ resistor in parallel to CAP1
Espressif Systems 16
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ESP32 Series Datasheet v3.5