The CC2651R3 SimpleLink^™ Wireless MCU contains an Arm^® Cortex^®-M4 system CPU, which runs the application and the higher layers of radio protocol stacks.

The system CPU is the foundation of a high-performance, low-cost platform that meets the system requirements of minimal memory implementation, and low-power consumption, while delivering outstanding computational performance and exceptional system response to interrupts.

Its features include the following:

• ARMv7-M architecture optimized for small-footprint embedded applications
• Arm Thumb®-2 mixed 16- and 32-bit instruction set delivers the high performance expected of a 32-bit Arm core in a compact memory size
• Fast code execution permits increased sleep mode time
• Deterministic, high-performance interrupt handling for time-critical applications
• Single-cycle multiply instruction and hardware divide
• Hardware division and fast digital-signal-processing oriented multiply accumulate
• Saturating arithmetic for signal processing
• Full debug with data matching for watchpoint generation
  • Data Watchpoint and Trace Unit (DWT)
  • JTAG Debug Access Port (DAP)
  • Flash Patch and Breakpoint Unit (FPB)
• Trace support reduces the number of pins required for debugging and tracing
  • Instrumentation Trace Macrocell Unit (ITM)
  • Trace Port Interface Unit (TPIU) with asynchronous serial wire output (SWO)
• Optimized for single-cycle flash memory access
• Tightly connected to 8-KB 4-way random replacement cache for minimal active power consumption and wait states
• Ultra-low-power consumption with integrated sleep modes
• 48 MHz operation
• 1.25 DMIPS per MHz