25 MHz Cortex-M3 with 16 KB Flash — the processing budget for deterministic control
The LM3S300-IGZ25-C2: This memory footprint fits a single-protocol stack (UART or SPI) plus a state-machine control loop without external memory — the firmware image must stay under 16 KB, so the code is compiled for size, not speed.
Serial connectivity and GPIO count — what the 36 pins connect to
The 36 GPIOs support I²C, Microwire, SPI, SSI, and UART/USART interfaces. This covers the common sensor buses (I²C for temperature/humidity, SPI for ADCs or displays) and a debug UART. The SSI port runs synchronous serial for codec or motor-encoder links. The internal oscillator eliminates the external crystal for the core clock, saving two pins and a board footprint — though an external source can still feed the clock tree if tighter timing is needed.
Industrial temperature range and package — board integration notes
The exposed pad also serves as the primary ground return for the core logic; a poor solder joint here can cause intermittent brown-out resets at temperature extremes.
Active lifecycle — no end-of-life risk for the BOM line
No stock-holding claim — availability verified per inquiry.