avr-libc  2.0.0
Standard C library for AVR-GCC

AVR Libc Home Page

AVRs

AVR Libc Development Pages

Main Page

User Manual

Library Reference

FAQ

Example Projects

Todo List
Module avr_boot
From email with Marek: On smaller devices (all except ATmega64/128), __SPM_REG is in the I/O space, accessible with the shorter "in" and "out" instructions - since the boot loader has a limited size, this could be an important optimization.