Features

• AVR® CPU
  • Running at up to 24 MHz
  • Single-cycle I/O access
  • Two-level interrupt controller
  • Two-cycle hardware multiplier
  • Supply voltage range: 1.8V to 5.5V
• Memories
  • Up to 32 KB in-system self-programmable Flash memory
  • 256B EEPROM
  • Up to 4 KB SRAM
  • 32B of user row in nonvolatile memory that can keep data during chip erase and can 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)
  • Clock options
    • High-precision internal high-frequency oscillator with selectable frequency up to 24 MHz (OSCHF)
      • Auto-tuning for improved internal oscillator accuracy
    • Internal PLL up to 48 MHz for high-frequency operation of Timer/Counter type D (PLL)
    • 32.768 kHz ultra-low power internal oscillator (OSC32K)
    • 32.768 kHz external crystal oscillator (XOSC32K)
    • External clock input
    • External high-frequency crystal oscillator (XOSCHF) with Clock Failure Detection
  • 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
  • Automated Cyclic Redundancy Check (CRC) Flash memory scan
  • Watchdog Timer (WDT) with Window mode, with a separate on-chip oscillator
  • External interrupt on all general purpose pins
• Peripherals
  • One 16-bit Timer/Counter type A (TCA) with three compare channels for PWM and waveform generation
  • Two 16-bit Timer/Counter type B (TCB) with input capture and signal measurements
  • One 12-bit PWM Timer/Counter type D (TCD) optimized for power control
  • One 16-bit Real-Time Counter (RTC) that can run from an external crystal or internal oscillator
  • Two USARTs
    • Operation modes: RS-485, LIN client, host SPI, and IrDA
    • Fractional baud rate generator, auto-baud, and start-of-frame detection
  • One SPI with host/client operation modes
  • One Two-Wire Interface (TWI) with dual address match
    • Simultaneous host/client operation (Dual mode)
    • Philips I²C compatible
    • Standard mode (Sm, 100 kHz)
    • Fast mode (Fm, 400 kHz)
    • Fast mode Plus (Fm+, 1 MHz) ⁽¹⁾
  • Event System for CPU independent and predictable inter-peripheral signaling
  • Configurable Custom Logic (CCL) with four programmable Look-up Tables (LUTs)
  • One 12-bit differential 130 ksps Analog-to-Digital Converter (ADC)
  • One 10-bit Digital-to-Analog Converter (DAC)
  • One Analog Comparator (AC)
  • One Zero-Cross Detector (ZCD)
  • Internal 1.024V, 2.048V, 2.500V and 4.096V voltage references, and external reference option (VREF)
• I/O and Packages:
  • Multi-Voltage I/O (MVIO) on I/O port C
  • Selectable input voltage threshold
  • Up to 17/16 programmable I/O pins
  • 20-pin VQFN 3x3 mm
  • 20-pin SOIC
  • 14-pin SOIC
• Temperature Ranges:
  • Industrial: -40°C to +85°C
  • Extended: -40°C to +125°C