Hello,
recently I want to try out the AT90USB64 mcu, the MU package.
I got my test board and solder the necessary components (same as what I use for ATMega32u4-AU), after soldering, I use a pro micro to test the board but AVRDUDESS can’t detect the mcu (I got message “unknown signature”)
I suspect the problem is one of these:
- faulty mcu: I bought the mcu on taobao for half the price
I have no ways to check this case - my soldering job is flawed
my first time solder an mcu with MU package, took more time than AU package mcu (ATMega32u4), I guess I may have damaged the mcu.
(more likely it’s the later case)
does anyone have experience with this mcu? is there anything about this mcu that I should pay attention to?
I thought I could use MU package to save some space, but it seems hard to solder with an iron (well… at least my skill is insufficient), I guess I will go back to AU package. I guess it’s fine since I would use this mcu for fullsize-level keyboard anyways.
Thanks for reading,
Tom.