ARM Cortex-M3 with 50 MHz core and 64 KB Flash
The Texas Instruments LM3S1133-IBZ50-A2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, clocked at 50 MHz with 64 KB of Flash and 16 KB of RAM. The 44 GPIOs are brought out to a 108-ball BGA package measuring 10x10 mm, rated for industrial temperature operation from -40°C to 85°C.
50 MHz — what it buys in a control application
The 50 MHz core delivers enough throughput for real-time control loops, protocol bridging (UART/SPI/I²C), and basic sensor fusion. If your application requires more memory or higher clock speed, the Stellaris family includes higher-density and faster variants, but none are a drop-in replacement — the BGA footprint and pinout are specific to this die.