Features

• AVR® CPU
  • Running at up to 24 MHz
  • Single-cycle I/O access
  • Two-level interrupt controller
  • Two-cycle hardware multiplier
  • Program and Debug Interface Disable (PDID)
  • Supply voltage range: 1.8-5.5V
• Memories
  • 16/32/64 KB in-system self-programmable Flash memory with a genuine read-while-write operation
  • 2/4/8 KB SRAM
  • 256B EEPROM
  • 512B of user row in nonvolatile memory that can keep data during chip erase and be programmed while the device is locked
  • 256B of boot row
  • 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)
  • Voltage Level Monitor (VLM) with interrupt at a programmable level above the BOD
  • Clock options
    • High-precision internal high-frequency oscillator with selectable frequency up to 24 MHz (OSCHF)
      • Auto-tuning for improved internal oscillator accuracy
    • 32.768 kHz 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 Pulse-Width Modulation (PWM) and waveform generation
  • Two 16-bit Timer/Counter type B (TCB) with input capture and signal measurements
  • One 16-bit Real-Time Counter (RTC) that can run from an external crystal or internal oscillator
  • One USB 2.0 full-speed (12 Mbps) device-compliant interface⁽¹⁾
    • Optional internal 3.3V voltage regulator
    • OSCHF oscillator can be tuned to the USB Start-of-Frames (SOFs) for crystal-less operation
    • 16 endpoint addresses each, with one input and one output endpoint for up to 32 endpoints
    • Multipacket transfer for reduced interrupt load and software intervention
  • Two USARTs
    • Operation modes: RS-485, LIN client, SPI host, 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 Inter-Integrated Circuit (I²C) compatible
    • Standard mode (Sm, 100 kHz)
    • Fast mode (Fm, 400 kHz)
    • Fast mode plus (Fm+, 1 MHz)⁽²⁾
  • Event System for CPU independent and predictable inter-peripheral signaling
  • Configurable Custom Logic (CCL) with four programmable Look-up Tables (LUTs)
  • One 10-bit 170 ksps Analog-to-Digital Converter (ADC)
  • One Analog Comparator (AC)
  • Internal 1.024V, 2.048V, 2.500V and 4.096V voltage references and external reference option (VREF)
• I/O and Packages:
  • Up to 25 (24) programmable GPIO (I/O) pins
  • 32-pin VQFN 5x5 mm and TQFP 7x7 mm
  • 28-pin VQFN 4x4 mm, SPDIP and SSOP
  • 20-pin VQFN 3x3 mm and SSOP
  • 14-pin SOIC
• Temperature Ranges:
  • Industrial: -40°C to +85°C