Features

• CPU
  • AVR^® CPU
  • Running at up to 20 MHz
  • Single-cycle I/O access
  • Two-level interrupt controller
  • Two-cycle hardware multiplier
• Memories
  • 4/8 KB In-system self-programmable Flash memory
  • 128B EEPROM
  • 256/512B SRAM
  • Write/erase endurance:
    • Flash: 10,000 cycles
    • EEPROM: 100,000 cycles
  • Data retention: 40 years at 55°C
• System
  • Power-on Reset (POR)
  • Brown-out Detector (BOD)
  • Clock options:
    • 16/20 MHz low-power internal RC oscillator
    • 32.768 kHz Ultra Low-Power (ULP) internal RC oscillator
    • 32.768 kHz external crystal oscillator
    • External clock input
  • Single-pin Unified Program and Debug Interface (UPDI)
  • Three sleep modes:
    • Idle with all peripherals running for immediate wake-up
    • Standby
      • Configurable operation of selected peripherals
      • SleepWalking peripherals
    • Power-Down with full data retention
• Peripherals
  • One 16-bit Timer/Counter Type A (TCA) with a dedicated period register and three compare channels
  • One 16-bit Timer/Counter Type B (TCB) with input capture
  • One 12-bit Timer/Counter Type D (TCD) optimized for control applications
  • One 16-bit Real-Time Counter (RTC) running from external crystal or internal RC oscillator
  • Watchdog Timer (WDT) with Window mode, with a separate on-chip oscillator
  • One USART with fractional baud rate generator, auto-baud, and start-of-frame detection
  • One master/slave Serial Peripheral Interface (SPI)
  • One Two-Wire Interface (TWI) with dual address match
    • Philips I²C compatible
    • Standard mode (Sm, 100 kHz)
    • Fast mode (Fm, 400 kHz)
    • Fast mode plus (Fm+, 1 MHz)
  • One Analog Comparator (AC) with a low propagation delay
  • One 10-bit 115 ksps Analog-to-Digital Converter (ADC)
  • One 8-bit Digital-to-Analog Converter (DAC)
  • Multiple voltage references (VREF):
    • 0.55V
    • 1.1V
    • 1.5V
    • 2.5V
    • 4.3V
  • Event System (EVSYS) for CPU independent and predictable inter-peripheral signaling
  • Configurable Custom Logic (CCL) with two programmable look-up tables
  • Automated CRC memory scan (CRCSCAN)
  • Peripheral Touch Controller (PTC)⁽¹⁾
    • Capacitive touch buttons, sliders, wheels and 2D surfaces
    • Wake-up on touch
    • Driven shield for improved moisture and noise handling performance
    • Up to six self capacitance channels
    • Up to nine mutual capacitance channels
  • External interrupt on all general purpose pins
• I/O and Packages:
  • 22 programmable I/O lines
  • 24-pin VQFN 4x4 mm
• Temperature Ranges:
  • -40°C to 105°C
  • -40°C to 125°C
• Speed Grades:
  • 0-5 MHz @ 1.8V – 5.5V
  • 0-10 MHz @ 2.7V – 5.5V
  • 0-20 MHz @ 4.5V – 5.5V