ATmega328pb firmware naturally erase.

[duckrae]

Hi. I have a question.

When I flash the bootloader and firmware, my arduino work very well.

I don't know why but as time goes by my arduino firmware naturally erase.

Bootloader doesn't erase. Only Firmware erase.

I made two product with Arduino.

One is using ATmega328p and the other is ATmege328pb with same code.

But ATmega328p doesn't erase firmware until now.

Only ATmega328pb firmware erase.

I keep watching arduino with terminal program. That is only thing i did after flash bootloader and firmware.

is there anyone know about this error?

[cedarlakeinstruments]

Why do you think the firmware is being erased?

[duckrae]

First, My product didn't send data to terminal program. so I checked it.

When I extracted the hex files, data part was "FF".

So, My conclusion is the firmware naturally erase in ATmega328pb.

and then, it work very well after flash firmware again.

[gilshultz]

It sounds like you are correct. Do you have another one, if so try it and see if the problem goes away. Hopefully it is from a different batch/lot. Is it a real Atmega328P (ATmega328PB) or a "counterfeit" one? It may have been a rejected unit that got in through the black market channel. At over 10 Billion to build a FAB I do not expect many fabs built to counterfeit chips. However they could come up with a design and have it go through a for-hire fab, a much cheaper option.

[sterretje]

@gilshultz it's my understanding that the 328PB looses its code, not the 328P.