ATmega644PA Key Features
- High-performance, low-power 8-bit AVR® Microcontroller
- Advanced RISC architecture
- 131 powerful Instructions
- most single-clock cycle execution
- 32 × 8 general purpose working registers
- Fully static operation
- Up to 20MIPS throughput at 20MHz
- On-chip 2-cycle multiplier
- High endurance non-volatile memory segments
- 16/32/64/128KBytes of In-System Self-programmable Flash program memory
