FPGA Clones
With the growing popularity of FPGAs among the open source community, people have started developing open source processors compatible with the AVR instruction set. The OpenCores website lists the following major AVR clone projects:
- pAVR, written in VHDL, is aimed at creating the fastest and maximally featured AVR processor, by implementing techniques not found in the original AVR processor such as deeper pipelining.
- avr_core, written in VHDL, is a clone aimed at being as close as possible to the ATmega103.
- Navré written in Verilog, implements all Classic Core instructions and is aimed at high performance and low resource usage. It does not support interrupts.
Read more about this topic: Atmel AVR