Each header contains hardware names, enum values, pin masks, register addresses, memory sizes, or device capabilities. It does not implement drivers or register access.

Interface

Projects choose namespace mcu = atmega2560; and access the device definitions through the module namespaces.

ATmega2560-specific features include four USART modules, six timers, additional GPIO ports, JTAG and external memory support.

Address spaces

GPIO names encode physical MCU ports, not Arduino pin identifiers. register_map uses data-space addresses (PORTB == 0x25); AVR IN/OUT offsets are different for the low I/O space.

Data sources

The module pages refer to the official ATmega2560 datasheet. Package-dependent information is organized by the package selected in MCUConfig.h.