Features

• CPU

– AVR® CPU

– Running at up to 20 MHz

– Single-cycle I/O access

– Two-level interrupt controller

– Two-cycle hardware multiplier

• Memories

– 16 KB In-system self-programmable Flash memory

– 256 bytes EEPROM

– 2 KB SRAM

– Write/erase endurance:

• Flash 10,000 cycles

• EEPROM 100,000 cycles

– Data retention:

• 40 years at 55°C

• System

– Power-on Reset (POR)

– Brown-out Detector (BOD)

– Clock options:

• 16/20 MHz low-power internal RC oscillator

• 32.768 kHz Ultra Low-Power (ULP) internal RC oscillator

• 32.768 kHz external crystal oscillator

• External clock input

– Single-pin Unified Program and Debug Interface (UPDI)

– Three sleep modes: