tight integration of system peripherals reduces area and development costs

Thumb instruction set combines high code density with 32-bit performance

support for single-cycle I/O access

power control optimization of system components

integrated sleep modes for low power consumption

fast code execution permits slower processor clock or increases sleep mode time

optimized code fetching for reduced flash and ROM power consumption

hardware multiplier

deterministic, high-performance interrupt handling for time-critical applications

deterministic instruction cycle timing

support for system level debug authentication

Serial Wire Debug reduces the number of pins required for debugging

support for optional instruction trace.