ARM Cortex-M0 at 45 MHz — what the core speed means for the control loop
The NXP LPC1225FBD48/301151 is a 32-bit ARM Cortex-M0 microcontroller from the LPC1200 series, clocked at 45 MHz. That core speed, combined with the single-cycle multiply and tightly coupled interrupt controller, handles sensor polling, PID loops, and serial protocol framing without a separate co-processor. The 64 KB on-chip Flash and 8 KB SRAM are sized for moderate firmware images — think motor-control firmware with a Modbus RTU stack, or a multi-channel data logger with a few hundred variables.