This application note describes how an
AVR with the SPM instruction can be
configured for self-programming. The
AVR communicates via the UART with
a PC running AVRprog programming
software. This enables FLASH and
EEPROM programming without the need
for an external programmer.
A Boot Load program is placed inside
the Boot Section of the Flash memory.
This program handles communication
with the host PC, and facilitates programming of both Flash and EEPROM
Once programmed, different levels of
protection can be used to protect the
memories. The AVR offers a unique
flexibility, setting different levels of protection on the Boot and Application
areas of the Flash memory. Individual
protection levels can be selected for both
portions of memory.
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