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Topic: USB boot En 1K resistor (Read 510 times) previous topic - next topic


Hi all,

I'm trying to understand what's the use of the resistor labelled as "USB boot En" in Arduino Mega 2560 and Uno schematics:
> Designator: RN3D

> Designator: RN2D

Besides drawing some extra mA when pin is high, does it play a special role in the reset event from 16U2 when USB port is open?
What would happened if removed?

Thank you very much!

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