Datasheet ATMEGA644RFR2 Equivalent ( PDF ) - Controller

ATmega2564, 1284, 644RFR2 Features Network support by hardware assisted Multiple PAN Address Filtering Advanced Hardware assisted Reduced Power Consumption High Performance, Low Power AVR® 8-Bit Microcontroller Advanced RISC Architecture - 135 Powerful Instructions Most Single Clock Cycle Execution - 32x8 General Purpose Working Registers , On-Chip 2-cycle Multiplier - Up to 16 MIPS Throug