- The XMEGA E series requires that you reset the interrupt yourself. For example :  TCC4_INTflags.0=1 'clear OV flag  

- The ERASE_APP NVM command (&H20) erases the complete flash, thus the boot space included. Use &H25 instead to erase and write a page.

- There is a fixed map for the virtual ports :

       VPORT0 - Virtual port A

       VPORT1 - Virtual port C

       VPORT2 - Virtual port D

       VPORT3 - Virtual port R

- CONFIG XPIN slewrate is for the whole port, not for an individual pin