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
Appendix A
Signal
No. Input signals
Default
value if
unassigned*
Same input
signal from
IO_MUX core Output signals
Output enable of
output signals
226 - - - sig_in_func226 1’d1
227 - - - sig_in_func227 1’d1
228 - - - sig_in_func228 1’d1
A.3. Ethernet_MAC
Table 26: Ethernet_MAC
PIN Name Function6 MII (int_osc) MII (ext_osc) RMII (int_osc) RMII (ext_osc)
GPIO0 EMAC_TX_CLK TX_CLK (I) TX_CLK (I) CLK_OUT(O) EXT_OSC_CLK(I)
GPIO5 EMAC_RX_CLK RX_CLK (I) RX_CLK (I) - -
GPIO21 EMAC_TX_EN TX_EN(O) TX_EN(O) TX_EN(O) TX_EN(O)
GPIO19 EMAC_TXD0 TXD[0](O) TXD[0](O) TXD[0](O) TXD[0](O)
GPIO22 EMAC_TXD1 TXD[1](O) TXD[1](O) TXD[1](O) TXD[1](O)
MTMS EMAC_TXD2 TXD[2](O) TXD[2](O) - -
MTDI EMAC_TXD3 TXD[3](O) TXD[3](O) - -
MTCK EMAC_RX_ER RX_ER(I) RX_ER(I) - -
GPIO27 EMAC_RX_DV RX_DV(I) RX_DV(I) CRS_DV(I) CRS_DV(I)
GPIO25 EMAC_RXD0 RXD[0](I) RXD[0](I) RXD[0](I) RXD[0](I)
GPIO26 EMAC_RXD1 RXD[1](I) RXD[1](I) RXD[1](I) RXD[1](I)
U0TXD EMAC_RXD2 RXD[2](I) RXD[2](I) - -
MTDO EMAC_RXD3 RXD[3](I) RXD[3](I) - -
GPIO16 EMAC_CLK_OUT CLK_OUT(O) - CLK_OUT(O) -
GPIO17 EMAC_CLK_OUT_180 CLK_OUT_180(O) - CLK_OUT_180(O) -
GPIO4 EMAC_TX_ER TX_ERR(O)* TX_ERR(O)* - -
In GPIO Matrix* - MDC(O) MDC(O) MDC(O) MDC(O)
In GPIO Matrix* - MDIO(IO) MDIO(IO) MDIO(IO) MDIO(IO)
In GPIO Matrix* - CRS(I) CRS(I) - -
In GPIO Matrix* - COL(I) COL(I) - -
*Notes: 1. The GPIO Matrix can be any GPIO. 2. The TX_ERR (O) is optional.
A.4. IO_MUX
For the list of IO_MUX pins, please see the next page.
Espressif Systems 58
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ESP32 Series Datasheet v3.5