User's Manual

ESP-32S User Manual
Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com
Interface
Signal
Pin
Function
SD_CLK
IO6
SDIO interface that conforms to the
industry standard SDIO 2.0 card
specification. On ESP -32S these pins are
connected to the integrated SPI flash.
SD_CMD
IO11
SDIO Slave
SD_DATA0
IO7
SD_DATA1
IO8
SD_DATA2
IO9
SD_DATA3
IO10
EMAC_TX_CLK
IO0
EMAC_RX_CLK
IO5
EMAC_TX_EN
IO21
EMAC—TXDO
IO19
EMAC—TXD1
IO22
EMAC—TXD2
IO14
EMAC—TXD3
IO12
EMAC_RX_ER
IO13
EMAC_RX_DV
IO27
EMAC
EMAC_RXD0
IO25
Ethernet MAC with MII/RMII interface
EMAC_RXD1
IO26
EMAC_RXD2
TXD
EMAC_RXD3
IO15
EMAC_CLK_OUT
IO16
EMAC_CLK_OUT_180
IO17
EMAC_TX_ER
IO4
EMAC_MDC_out
Any GPIOs*
EMAC_MDI_in
Any GPIOs*
EMAC_MDO_out
Any GPIOs*
EMAC_CRS_out
Any GPIOs*
EMAC_COL_out
Any GPIOs*
Note:
• Functions of Motor PWM,LEDPWM,UART,l2C,l2S,general purpose SPI and Remote Controller can be
configured to any GPIO except GPIO6,GPIO7,GPIO8,GPIO9,GPIO10 and GPIO11.
•
In Table6, for the items marked with ”Any GPIOs*” in the ”Pin” column, users should note that
GPIO6, GPIO7, GPIO8, GPIO9, GPIO10 and GPIO11 are connected to the integrated SPI flash of
ESP-32S and are not recommended for other uses.