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Topic: DIY an Arduino M0 board (Read 157 times) previous topic - next topic


Hello everyone! I'm new to the forum here and also new to Arduino ecosystem.

I've been trying to make a minimal version of arduino m0 board which uses ATSAMD21G18  microcontroller.

I downloaded the reference design of M0 from arduino's page, And removed everything that was not necessary. I also cross checked with adafruit's feather M0 board and the schematics looks fine to me. So I etched the circuit on a pcb .. soldered all the components but it down't seem to work. The computer doesn't detect the board at all. And yes, I double checked all the connections on the pcb. and all is fine.

see the attachment for the schematics I came up with.

What are the things that could go wrong?

The arduino M0's page mentions that boot-loader is preburned by atmel so I'm guessing this is not a problem.

Is 3.3v the ABSOLUTE maximum for this mcu. because I supplied 3.9v through a li-ion battery.

What do you guys suggest? has anyone done it before?


Absolute max is 3.8V according to datasheet, so 3.9V is rather out of spec. I didn't see anything obviously wrong on the schematic.
Please don't PM me asking for help. Ask questions in the forum.

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