Key features
   • Operating characteristics
   – Voltage range: 2.7 to 5.5 V
   – Flash write voltage range: 2.7 to 5.5 V
   – Temperature range (ambient): -40 to 105°C
   • Performance
   – Up to 20 MHz Arm® Cortex-M0+ core
   – Single cycle 32-bit x 32-bit multiplier
   – Single cycle I/O access port
   • Memories and memory interfaces
   – Up to 64 KB flash
   – Up to 256 B EEPROM
   – Up to 4 KB RAM
   • Clocks
   – Oscillator (OSC) - supports 32.768 kHz crystal or 4
      MHz to 20 MHz crystal or ceramic resonator; choice
      of low power or high gain oscillators
   – Internal clock source (ICS) - internal FLL with
      internal or external reference, 31.25 kHz
      pre-trimmed internal reference for 16 MHz system clock
      (able to be trimmed for up to 20 MHz system clock)
   – Internal 1 kHz low-power oscillator (LPO)
   • System peripherals
   – Power management module (PMC) with three power
      modes: Run, Wait, Stop
   – Low-voltage detection (LVD) with reset or interrupt,
      selectable trip points
   – Watchdog with independent clock source (WDOG)
   – Programmable cyclic redundancy check module
      (CRC)
   – Serial wire debug interface (SWD)
   – Bit manipulation engine (BME)
   • Security and integrity modules
   – 64-bit unique identification (ID) number per chip
   • Human-machine interface
   – Up to 57 general-purpose input/output (GPIO)
   – Two up to 8-bit keyboard interrupt modules (KBI)
   – External interrupt (IRQ)
   • Analog modules
   – One up to 16-channel 12-bit SAR ADC, operation in
      Stop mode, optional hardware trigger (ADC)
   – Two analog comparators containing a 6-bit DAC
      and programmable reference input (ACMP)
   • Timers
   – One 6-channel FlexTimer/PWM (FTM)
   – Two 2-channel FlexTimer/PWM (FTM)
   – One 2-channel periodic interrupt timer (PIT)
   – One real-time clock (RTC)
• Communication interfaces
   – Two SPI modules (SPI)
   – Up to three UART modules (UART)
   – One I2C module (I2C)
• Package options
   – 64-pin QFP/LQFP
   – 44-pin LQFP
   – 32-pin LQFP