Ethernet connection pins

nene89
Posts: 1
Joined: Wed Sep 26, 2018 7:51 am

Ethernet connection pins

Postby nene89 » Wed Sep 26, 2018 10:28 am

Hi,
I want to connect the driver LAN8742 to ESP32 for the ethernet port.
Have I connected the right pins?


RMII_RXD0 to IO25
RMII_RXD1 to IO26
RMII_CRS_DV to IO27
RMII_MDC to IO23
RMII_TXD1 to IO22
RMII_TX_EN to IO21
RMII_TXD0 to IO19
RMII_MDIO to IO18
RMII_REF_CLK to IO0


thanks in advance.

robertson80
Posts: 4
Joined: Tue Sep 25, 2018 12:45 am

Re: Ethernet connection pins

Postby robertson80 » Sun Sep 30, 2018 4:42 pm

Those are the pins I connected my LAN8720 to and it works ok. Take care with GPIO0 to prevent it entering flash mode accidentally from the clock input though.

robertson80
Posts: 4
Joined: Tue Sep 25, 2018 12:45 am

Re: Ethernet connection pins

Postby robertson80 » Mon Oct 01, 2018 1:25 pm

Yes those are the correct pins. Care must be taken on GPIO0 to on startup to prevent it booting into flash mode thugh.

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