The sample applications are built to support a maximum channel support configuration available for that particular device for both IAR & AVR IDEs.
Internally there are two configurations for each device.
ALL KEYS configuration : Supports only keys
KEYS/ROTORS/SLIDERS configuration : Supports keys or rotors or sliders concurrently
These configurations enable a set of stored options and a specific library to be selected in order to build application using the specific library.