
The Atmel XMEGA AVR microcontroller family feature either one or both of the following physical interfaces:
Interface
Name |
Interface description |
Number of interface signals |
XMEGA pins required for programming |
PDI |
Program and Debug Interface |
2-wire |
· PDI_CLK
· PDI_DATA |
JTAG |
JTAG Program / Debug Interface |
4-wire |
· TDI, TMI, TCK, TDO
· RESET (optional) |
A graphical overview of the ‘PDI’ and ‘JTAG’ interfaces is shown in the diagram above.
|