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Q: GPIO electrical level status

Posted: Mon Dec 07, 2015 6:58 pm
by ESP_Greg
Q: GPIO electrical level status

XPD_DCDC is output as high level. Except it, rest GPIO can config as input high level.
About GPIO default status after booting: except 6 SDIO/GPIO4/GPIO5/GPIO16, rest GPIO all have internal pull-up resistor.
If config as low level, need external pull-low or inverting circuits triode.

PS: GPIO can't connect to 5V.
GPIO4/5can't be full-up to high level with external 1M resistor; you need 100K resistor instead. As attachment showed.