Features

• CPU

– AVR® 8-bit CPU

– Running at up to 20MHz

– Single Cycle I/O Access

– Two-level Interrupt Controller

– Two-cycle Hardware Multiplier

• Memories

– 4/8KB In-system self-programmable Flash Memory

– 128B EEPROM

– 256/512B SRAM

• System

– Power-on Reset (POR)

– Brown-out Detection (BOD)

– Clock Options:

• 16/20MHz Low Power Internal RC Oscillator

• 32.768kHz Ultra Low Power (ULP) Internal RC Oscillator

• 32.768kHz External Crystal Oscillator

• External Clock Input

– Single Pin Unified Program Debug Interface (UPDI)

– Three Sleep Modes:

• Idle with All Peripherals Running and Mode for Immediate Wake Up Time

• Standby

– Configurable Operation of Selected Peripherals

– SleepWalking Peripherals

• Power Down with Wake-up Functionality

• Peripherals

– 6-channel Event System

– One 16-bit Timer/Counter Type A with Dedicated Period Register, Three Compare Channels

(TCA)

– One 16-bit Timer/Counter type B with Input Capture (TCB)

– One 12-bit Timer/Counter type D Optimized for Control Applications (TCD)

– One 16-bit Real Time Counter (RTC) Running from External Crystal or Internal RC Oscillator

– One USART with Fractional Baud Rate Generator, Auto-baud, and Start-of-frame Detection

– Master/Slave Serial Peripheral Interface (SPI)

– Master/Slave TWI with Dual Address Match

• Standard Mode (Sm, 100kHz)

• Fast Mode (Fm, 400kHz)

• Fast Mode Plus (Fm+, 1MHz)

– Configurable Custom Logic (CCL) with Two Programmable Lookup Tables (LUT)

– Analog Comparator (AC) with Low Propagation Delay

– 10-bit 115ksps Analog to Digital Converter (ADC)

– 8-bit Digital to Analog Converter (DAC)

– Five Selectable Internal Voltage References: 0.55V, 1.1V, 1.5V, 2.5V and 4.3V

– Automated CRC Memory Scan

– Watchdog Timer (WDT) with Window Mode, with Separate On-chip Oscillator

– Peripheral Touch Controller (PTC)(1)

• Capacitive Touch Buttons, Sliders and Wheels

• Wake-up on Touch

• Driven Shield for Improved Moisture and Noise Handling Performance

• Six Self-capacitance and Nine Mutual-capacitance Channels

– External Interrupt on All General Purpose Pins

• I/O and Packages:

– 22 Programmable I/O Lines

– 24-pin VQFN 4x4

• Temperature Ranges:

– -40°C to 105°C

– -40°C to 125°C Temperature Graded Device Options Available

• Speed Grades:

– 0-5MHz @ 1.8V – 5.5V

– 0-10MHz @ 2.7V – 5.5V

– 0-20MHz @ 4.5V – 5.5V