/**
 * @defgroup    cpu_atmega_common Atmel ATmega CPU: common files
 * @brief       AVR Atmega specific code
 * @ingroup     cpu
 *
 * ### Pin Change Interrupts
 *
 * Pin Change Interrupts (PCINTs) can be enabled using pseudo modules. To provide
 * a low-memory overhead implementation, the PCINTs are grouped into **banks**.
 * Each banks corresponds to one PCINT on the ATmega (PCINT0, ..., PCINT3).
 *
 * To enable only a specific bank, simply add `USEMODULE += atmega_pcintN` to your
 * Makefile. To enable all interrupts you can use `USEMODULE += atmega_pcint`.
 *
 * In case you want to add a new CPU, simply provide an `atmega_pcint.h` with your
 * CPU and adapt your Makefile.dep and Makefile.features files.
 */