Features

  • AVR® CPU
    • Running at up to 24 MHz
    • Single-cycle I/O register access
    • Two-level interrupt controller
    • Two-cycle hardware multiplier
    • Supply voltage range: 1.8V to 5.5V
  • Memories
    • 32 KB In-System self-programmable Flash memory
    • 512B EEPROM
    • 4 KB SRAM
    • 32B 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: 10,000 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 failure detection
    • Clock options
      • High-precision internal 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)
      • Internal ultra-low power 32.768 kHz oscillator (OSC32K)
      • External 32.768 kHz 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
  • Peripherals
    • Up to two 16-bit Timer/Counters type A (TCA) with three compare channels for PWM and waveform generation
    • Up to four 16-bit Timer/Counters type B (TCB) with input capture for 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 external crystal or internal oscillator
    • Up to five USARTs
      • Operation modes: RS-485, LIN client, host SPI, and IrDA
      • Fractional baud rate generator, auto-baud, and start-of-frame detection
    • Two SPIs with host/client operation modes
    • Up to two 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)(1)
    • Event System for CPU-independent and predictable inter-peripherals signaling
    • Configurable Custom Logic (CCL) with up to six programmable Look-up Tables (LUTs)
    • One 12-bit 130 ksps differential Analog-to-Digital Converter (ADC)
    • Three Analog Comparators (ACs) with window compare functions
    • One 10-bit Digital-to-Analog Converter (DAC)
    • Up to two Zero-Cross Detectors (ZCDs)
    • Analog Signal Conditioning (OPAMP) peripheral with up to three op amps, each with an internal resistor ladder that allows for many useful configurations with no external components
    • Multiple voltage references (VREF)
      • 1.024V
      • 2.048V
      • 2.500V
      • 4.096V
      • External Voltage Reference (VREFA)
      • Supply Voltage (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
    • Multi-Voltage I/O (MVIO) on I/O port C
    • Selectable input voltage threshold
    • Up to 41/40 programmable I/O pins
    • 28-pin SSOP, SOIC and SPDIP
    • 32-pin VQFN 5x5 mm and TQFP 7x7 mm
    • 48-pin VQFN 5x5 mm and TQFP 7x7 mm
  • Temperature Ranges
    • Industrial: -40°C to 85°C
    • Extended: -40°C to 125°C
Note:
  1. I2C Fm+ is only supported for supply voltage VDD above 2.7 VDC.