• ARM Cortex-M3 CPU platform
   • High Performance 32-bit processor @ up to 48 MHz
   • Memory Protection Unit
• Flexible Energy Management System
   • 20 nA @ 3 V Shutoff Mode
   • 0.4 µA @ 3 V Shutoff Mode with RTC
   • 0.8 µA @ 3 V Stop Mode, including Power-on Reset, Brown-out
      Detector, RAM and CPU retention
   • 1.1 µA @ 3 V Deep Sleep Mode, including RTC with 32.768 kHz
      oscillator, Power-on Reset, Brown-out Detector, RAM and CPU
      retention
   • 80 µA/MHz @ 3 V Sleep Mode
   • 219 µA/MHz @ 3 V Run Mode, with code executed from flash
• 1024/512 KB Flash
   • Read-while-write support
• 128 KB RAM
• 56 General Purpose I/O pins
   • Configurable push-pull, open-drain, pull-up/down, input filter, drive
      strength
   • Configurable peripheral I/O locations
   • 16 asynchronous external interrupts
   • Output state retention and wake-up from Shutoff Mode
• 12 Channel DMA Controller
• 12 Channel Peripheral Reflex System (PRS) for autonomous 
   inter-peripheral signaling
• Hardware AES with 128/256-bit keys in 54/75 cycles
• Timers/Counters
   • 4× 16-bit Timer/Counter
      • 4×3 Compare/Capture/PWM channels
      • Dead-Time Insertion on TIMER0
   • 16-bit Low Energy Timer
   • 1× 24-bit Real-Time Counter and 1× 32-bit Real-Time Counter
   • 3× 16/8-bit Pulse Counter with asynchronous operation
   • Watchdog Timer with dedicated RC oscillator @ 50 nA
• Backup Power Domain
   • RTC and retention registers in a separate power domain, 
      available in all energy modes
   • Operation from backup battery when main power drains out

32-bit ARM Cortex-M0+, Cortex-M3 and Cortex-M4 microcontrollers for:
• Energy, gas, water and smart metering
• Health and fitness applications
• Smart accessories