Espressif ESP32-Ethernet-Kit Getting Started Manual page 6

G O5
DIP SW GPIO Pin
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
2 MTCK GPIO15, see also
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)
RMII Interface
1 GPIO21
2 GPIO19
3 GPIO22
4 GPIO25
5 GPIO26
6 GPIO27
7 GPIO0
Serial Management Interface
Co ected to S _
Pin Func onality if DIP SW is ON
Func on Switch
Func on Switch
IP101GRI (PHY)
TX_EN
TXD[0]
TXD[1]
RXD[0]
RXD[1]
CRS_DV
REF_CLK
put o 0 G