(This is an edited answer as my first one was providing wrong details)
So I finally find the details I needed, and was able to fix the Xprotolab Plain :-)
Everything provided in documentation about firmware update is OK, except that the details on "what is the PIN 1 / 6 of J8 connector" are missing.
I did a (fixed) pin diagram : I'm sharing it here, this time it seems to be OK

So the J8 connector is the extension port, not soldered and with only surface mount soldering points, next to the MCU. You have to solder a connector here (for example, a low-profil 1*6 connector is perfect) and "sacrifice" the PDI connector (actually, you will never use it if you don't have a PDI compliant programmer). Then you will be able to link PIN 1 to 6 in it and once you have connected USB, you have to remove the link.
After that, follow the instructions. As the Atmel website is gone since december 2017, you have to search into archive.org for the FLIP tool . Don't forget to use the USB driver provided with FLIP when your computer identify the device, not the WinUSB driver from Zadig tool.
Once the firmware is updated, this nice little device is back to normal :-) |