line_code's pictures:
This is very strange because I've never seen an official mention of the "ATmega328P-U"
I have seen this topic on the forum before:
- Problem with microcontroller changing and uploading sketch - Microcontrollers - Arduino Forum
- What are differences between ATMEL328PU and ATMEGA328P-PU - General Discussion - Arduino Forum
and on avrfreaks:
https://www.avrfreaks.net/forum/atmega328-chip-markings-initial-program-memory-and-flags-state-ids
But nowhere do I see a good conclusion on what the story is with this chip. I don't even see a listing on Mouser for the ATmega32P-U. I would contact Mouser customer service and ask them if they know why their chips are marked in a non-standard way.
line_code:
I've noticed that the ATEMEGA328P U version doesn't function quite like it should
Please explain exactly what you mean by "doesn't function quite like it should".