Olimex pinout text inaccurate/incomplete if you're using ethernet ESP32-POE?

[wacime]

Thank you for the clear answers. That was greatly helpful.
For future readers, I was able to create an SPI interface using EMAC GPIO pins with seemingly no problems. Hope it helps someone.

[busolin]

Looking the pinout picture at https://www.olimex.com/Products/IoT/ESP32/ESP32-POE-ISO/resources/ESP32-POE-ISO-GPIO.png I think there are few errors regarding the EMAC labels.
- First the label EMAC_TX_CLK is duplicated on GPIO0 and GPIO1
- Second, taking a look to the schematic all pins (TX_CLK, TX_ER, RX_CLK, CLK_OUT_180, RXD3, TXD2 an RX_ER) seams NOT connected at all to the connectors.

This is the schematic: https://ibb.co/NCn0tLK
And this is the picture with notes: https://ibb.co/VjdyK4G

Thanks for the development of the board, it's amazing!

[espethuser]

From my testing a few of the pins (eg GPIO13) are also pulled up so are unusable for (for example) a straightforward digital read as they stand

[LubOlimex]

Being able to use it and having a pull-up on that line are two different things.

GPIO13 has 2.2K pull-up resistor R35 by design so that it can be used as I2C pin. Look at the schematic around the UEXT connector.