3.6.1.6 Cpu Option

The -mcpu=device option should be used to specify the target device or at least a target architecture family.

For example:

xc8-cc -mcpu=atmega161 main.c

To see a list of supported devices that can be used with this option, use the -mprint-devices option (see Print-devices). The available architecture families are tabulated below.

Table 3-5. Selectable Architecture Families
Architecture	Architecture Features
`avr1`	Simple core, no data RAM, assembly support only.
`avr2`	Classic core, up to 8 KB program memory.
`avr25`	avr2 with `movw` and `lpm Rx,Z[+]` instructions.
`avr3`	Classic core with up to 64 KB extended program memory.
`avr31`	Classic core with 128 KB of program memory.
`avr35`	avr3 with `movw` and `lpm Rx,Z[+]` instructions.
`avr4`	Enhanced core up to 8 KB program memory.
`avr5`	Enhanced core up to 64 KB program memory.
`avr51`	Enhanced core 128 KB program memory.
`avr6`	Enhanced core 256 KB program memory.
`avrxmega2`	XMEGA core, up to 64 KB program memory, up to 64 KB data address space.
`avrxmega3`	XMEGA core with program memory mapped into data address space.
`avrxmega4`	XMEGA core, up to 128 KB program memory, up to 64 KB data address space.
`avrxmega5`	XMEGA core, up to 128 KB program memory, greater than 64 KB data address space.
`avrxmega6`	XMEGA core, greater than 128 KB program memory, up to 64 KB data address space.
`avrxmega7`	XMEGA core, greater than 128 KB program memory, greater than 64 KB data address space.
`avrtiny`	tinyAVR core, 16 registers.