fix #10, make updi documentation slightly more readable

SpenceKonde / AVR-Guidance

A guide to best practices when using the Arduino IDE to program AVR microcontrollers

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fix #10, make updi documentation slightly more readable #21

Open fritzlb opened 2 months ago

fritzlb commented 2 months ago

changed the order so that everything regarding tx resistor is in the section, fixed up enumerating, added a few line breaks, added that RX diodes are oftentimes between RX and VCC