The Texas Instruments LM3S612-IQN50-C2 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 600 series, running at 50 MHz with 32 KB of Flash program memory and 8 KB of SRAM.
50 MHz core — timing margin for the bus
The 50 MHz core clock is the headline performance spec for this Cortex-M3. At this speed, the bus turnaround and memory access timing become the limiting factor for deterministic control loops. The 32 KB Flash and 8 KB RAM are sized for a single control algorithm with moderate data logging; designs that need larger code space or more buffering will hit the memory ceiling before the core speed becomes the bottleneck.