ARM Cortex-M3 at 25 MHz — what the core speed means for your control loop
The LM3S310-EGZ25-C2T runs a 32-bit ARM Cortex-M3 core at 25 MHz. That clock rate handles typical sensor polling, UART communication, and PWM generation without stalling the main loop — adequate for a single-axis motor drive or a simple HMI panel where the timing budget is in the microsecond range, not nanoseconds. The 16 KB Flash and 4 KB SRAM limit firmware complexity; expect to fit a modest state machine, a few lookup tables, and a bootloader, but not a full RTOS with multiple stacks.
Industrial temperature range — where this MCU can live
Rated for -40°C to 105°C, this part is qualified for outdoor telecom cabinets, engine-bay controllers, and factory-floor equipment where the ambient temperature swings beyond commercial limits. The exposed pad package (7x7 mm) needs a thermal via pattern under the pad to pull heat into the ground plane.