ESP32 of GPIO

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linyaqiang
Posts: 8
Joined: Thu Apr 19, 2018 12:28 am

ESP32 of GPIO

Postby linyaqiang » Tue Aug 21, 2018 2:43 am

请问有谁知道ESP32内部上拉电阻是多大？
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Archibald
Posts: 110
Joined: Mon Mar 05, 2018 12:44 am

Re: ESP32 of GPIO

Postby Archibald » Tue Aug 21, 2018 7:21 am

From the datasheet section 5.3, pull-up resistance is typically 45kΩ. Minumum and maximum values are not specified.

By connecting a resistor to ground and measuring the voltage, I am measuring a pull-up resistance of 23kΩ but that is just for one pin on one ESP32.
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