I’ve ran into a bit of a strange problem. I am using ATMEGA328 chips as the microcontroller for a circuit board I designed. I am using the ATMEGA328P-PU version like the uno uses. I have purchased chips from both Mouser and Digikey and I’ve found that the ones I get from Mouser are labeled ATMEGA328P U and the ones from Digikey are labeled ATMEGA328P-PU like the ones in the uno. I verified that I did indeed buy ATMEGA328P-PU from both suppliers. I don’t exactly care about the labeling, but I’ve noticed that the ATEMEGA328P U version doesn’t function quite like it should after a little while of use until you start over by cycling the power. What is the difference between ATMEGA328P U and ATMEGA328P-PU? Why don’t the two versions operate the same? Is it possible to get them to operate the same?
I’ve attached pictures of the two versions for your reference.
Please let me know if you can help me.