ESP-WROVER-KIT SCH-3: IO2 pulled up and down for SD card
Posted: Fri Mar 16, 2018 11:51 pm
https://dl.espressif.com/dl/schematics/ ... _SCH-3.pdf
IO2 has 5K to ground and 10K to 3V3 near the SD card.
I thought that IO2 is to be pulled up for SD card operation whereas this would sit at about 1.1V.
IO2 uses a third transistor in the auto program circuit. Is this so that IO0 and IO2 can be used individually after boot rather than connecting them together and losing an IO pin?
IO2 has 5K to ground and 10K to 3V3 near the SD card.
I thought that IO2 is to be pulled up for SD card operation whereas this would sit at about 1.1V.
IO2 uses a third transistor in the auto program circuit. Is this so that IO0 and IO2 can be used individually after boot rather than connecting them together and losing an IO pin?