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) ⁽¹⁾
  • 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 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
  • 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) ⁽²⁾
  • 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