UPDI interface design

Thread Starter

tyro01

Joined May 20, 2021
87
Hi, I'm planning to make ATmega4808 based Arduino compatible.
The circuit currently being designed is as follows:
sche.png
Writing pins are integrated into CN1.
I am new to designing UPDI circuits and I believe the best design is to have independent UPDI terminals, how would you guys rate this design?

Thanks,
 

DickCappels

Joined Aug 21, 2008
10,153
Keeping the program/debug terminals separate from the rest of the circuitry will make you life a little bit easier, so if you the pins to spare, it is a good way to go.
 

Thread Starter

tyro01

Joined May 20, 2021
87
I decided to coexist with the traditional USB-Serial and the new UPDI interface.
UPDI pin uses with VCC and GND, so the final layout looked like this.
interface.png
Thank you very much!
 
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