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