Features
 High Performance, Low Power AVR® 8-Bit Microcontroller Family
 Advanced RISC Architecture
̶ 131 Powerful Instructions – Most Single Clock Cycle Execution
̶ 32 x 8 General Purpose Working Registers
̶ Fully Static Operation
̶ Up to 20 MIPS Throughput at 20MHz
̶ On-chip 2-cycle Multiplier
 High Endurance Non-volatile Memory Segments
̶ 4/8/16/32KBytes of In-System Self-Programmable Flash program memory
̶ 256/512/512/1KBytes EEPROM
̶ 512/1K/1K/2KBytes Internal SRAM
̶ Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
̶ Data retention: 20 years at 85°C/100 years at 25°C(1)
̶ Optional Boot Code Section with Independent Lock Bits
 In-System Programming by On-chip Boot Program
 True Read-While-Write Operation
̶ Programming Lock for Software Security
 QTouch® library support
̶ Capacitive touch buttons, sliders and wheels
̶ QTouch and QMatrix™ acquisition
̶ Up to 64 sense channels
 Peripheral Features
̶ Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
̶ One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode