Features

• AVR® CPU

– Running at up to 20 MHz

– Single-cycle I/O register access

– Two-level interrupt controller

– Two-cycle hardware multiplier

– Supply voltage range: 1.8-5.5V

• Memories

– 16 KB In-system-programmable Flash memory with a true read-while-write operation

– 2 KB SRAM

– 512B EEPROM

– 64B of user row in nonvolatile memory that can keep data during chip-erase and be programmed while

the device is locked

– Write/erase endurance

• Flash: 1,000 cycles

• EEPROM: 100,000 cycles

– Data retention: 40 Years at 55°C

• System

– Power-on Reset (POR) circuit

– Brown-out Detector (BOD) with user-programmable levels

– Voltage Level Monitor (VLM) with interrupt at a programmable level above the BOD level

– Clock options:

• High-precision internal oscillator with selectable frequency up to 20 MHz (OSCHF)

– Auto-tuning for improved internal oscillator accuracy

• Internal PLL up to 80 MHz for high-frequency operation of Timer/Counter type E/F

• Internal ultra-low power 32.768 kHz oscillator (OSC32K)

• External 32.768 kHz crystal oscillator (XOSC32K)

• External clock input

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

– Three sleep modes

• Idle with all peripherals running for immediate wake-up

• Standby with a configurable operation of selected peripherals

• Power-Down with full data retention

• Peripherals

– Two 16-bit Timer/Counters type B (TCB) with input capture for capture and signal measurements

– One 16-bit Timer/Counter type E (TCE) with four compare channels for PWM generation and Waveform

Extension (WEX)

– One 24-bit Timer/Counter type F (TCF) for frequency generation

– One 16-bit Real-Time Counter (RTC) that can run from an external crystal or internal oscillator

– One USART with fractional baud rate generator, auto-baud, and start-of-frame detection

– One host/client Serial Peripheral Interface (SPI)

– One Two-Wire Interface (TWI) with dual address match

• Independent host and client operation (Dual mode)

• Phillips I2C compatible

• Standard mode (Sm, 100 kHz)

• Fast mode (Fm, 400 kHz)

• Fast mode plus (Fm+, 1 MHz)

– Event System for CPU-independent and predictable inter-peripheral signaling

– Configurable Custom Logic (CCL) with up to four programmable Look-up Tables (LUTs)

– One 12-bit, 300 ksps, differential Analog-to-Digital Converter (ADC) with a programmable gain amplifier

(PGA)

– Two Analog Comparators (ACs) with window compare functions

– Multiple voltage references (VREF)

• 1.024V

• 2.048V

• 2.500V

• 4.096V

• VREFA

• VDD

– Automated Cyclic Redundancy Check (CRC) Flash program memory scan

– Watchdog Timer (WDT) with Window mode and separate on-chip oscillator

– External interrupt on all general purpose pins

• I/O and Packages:

– Up to 28/27 programmable I/O pins

– 14-pin SOIC and TSSOP

– 20-pin SSOP and VQFN

– 28-pin SPDIP, SSOP and VQFN

– 32-pin VQFN and TQFP

• Temperature Ranges

– Industrial: -40°C to 85°C ambient

– Extended: -40°C to 125°C ambient