Some help would be appreciated.
We have developed our project on ATXMEGA256D3, while planning to use ATXMEGA192D3 in production. We have received some ATXMEGA256A3 samples, and we have built 4 boards. Strange thing is, that PORTB, b5&6 on all of these are reading as zero, even when they are at a high voltage (when we measure). We are applying 0xF0 to the pins, but it reads back as 0x50...
If we take the same board, and replace the chip with a D3, it works fine as expected.
Does anyone have any experience in this?