Espressif ESP32-Ethernet-Kit, Getting Started Manual

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DIP SW GPIO Pin Pin Func onality if DIP SW is ON
G O5 Co ected to S _ put o 0 G
8 n/a
You can make a certain GPIO pin available for other purposes by pu ng its DIP SW to the Off
posi on.
Flow Control
This is a 2 x 2 jumper pin header intended for the UART flow control.
. Signal Comment
1 MTDO GPIO13, see also Func on Switch
2 MTCK GPIO15, see also Func on Switch
3 RTS RTS signal of FT2232
4 CTS CTS signal of FT2232
GPIO Allocation
This sec on describes alloca on of ESP32 GPIOs to specific interfaces or func ons of the
ESP32-Ethernet-Kit.
IP101GRI (PHY) Interface
The alloca on of the ESP32 (MAC) pins to IP101GRI (PHY) is shown in the table below.
. ESP32 Pin (MAC) IP101GRI (PHY)
RMII Interface
1 GPIO21 TX_EN
2 GPIO19 TXD[0]
3 GPIO22 TXD[1]
4 GPIO25 RXD[0]
5 GPIO26 RXD[1]
6 GPIO27 CRS_DV
7 GPIO0 REF_CLK
Serial Management Interface