Help for migrate firmware from atmega1280 to 2560

Other Hardware 3rd Party Boards
1

hi, due to chip shortage we have to migrate our firmware from atmega 1280 into 2560

two chips are same Suffixes(16U - TH) so we think they can pin to pin replace.

we tried burn 1280 version firmware into the 2560 chip board - not work
change the board setting into 2560 at arduino IDE and compile then burned the board - compile complete but the board still not work

we checked the datasheet and schematic design. The chips work on 5V and BODLEVEL code is 100 means work on 16mhz are fine.

Is there anything i missed?

2

@jimmjimm, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project :wink: See About the Installation & Troubleshooting category.

3

Do you mean it compiled but didn’t upload ?
What doesn’t work ?
Outputs connected to the correct pins ?
Wiring diagram ?
Code ?

4

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