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
    • 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)
    • 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
    • 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/Counter type A (TCA) with a dedicated period register and three PWM channels
    • Up to four 16-bit Timer/Counter type B (TCB) with input capture and simple PWM functionality
    • One 12-bit Timer/Counter type D (TCD) optimized for power control
    • One 16-bit Real-Time Counter (RTC) running from an external crystal or internal oscillator
    • Up to five USART with fractional baud rate generator, auto-baud, and start-of-frame detection
    • Two host/client Serial Peripheral Interface (SPI)
    • Up to two Two-Wire Interface (TWI) with dual address match
      • Independent host and 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 up to six programmable Look-up Tables (LUT)
    • One 12-bit differential 130 ksps 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 (ZCD)
    • Multiple voltage references (VREF)
      • 1.024V
      • 2.048V
      • 2.500V
      • 4.096V
    • Peripheral Touch Controller (PTC) with Driven Shield+ and Boost Mode technologies for capacitive touch buttons, sliders, wheels and 2D surface
      • Up to 32 self-capacitance and 256 mutual capacitance channels
    • 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
  • I/O and Packages:
    • Up to 41 programmable I/O pins
    • 28-pin SPDIP, SSOP and SOIC
    • 32-pin VQFN 5x5 mm and TQFP 7x7 mm
    • 48-pin VQFN 6x6 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 VDD above 2.7V.