50 MHz Cortex-M3 with 32 KB Flash — the industrial-control sweet spot
32 KB Flash, 8 KB SRAM — sizing the firmware budget
The 32 KB program memory (32K x 8) is Flash, so field updates are possible through the UART or SPI bootloader. The 8 KB SRAM (8K x 8) is the working memory for stack, heap, and data buffers. For a control loop with moderate data logging or a small TCP/IP stack, this memory tier works; a design with large lookup tables or a full RTOS will hit the ceiling. The 50 MHz core executes single-cycle multiply and a 12-cycle divide, which keeps the MIPS budget predictable for PID loops and sensor fusion.
That means it can sit in an outdoor telecom cabinet, a factory-floor PLC, or an engine-bay controller without the firmware glitching from thermal drift.
The Stellaris family was acquired from Luminary Micro and later rolled into the Tiva-C portfolio; no direct pin-compatible replacement was announced for this exact density and package.
48-LQFP footprint — board-level fit
A layout engineer should verify the pin-for-pin compatibility against the target PCB; the 32 I/Os are multiplexed with the ADC and serial interfaces.