Stellaris ARM Cortex-M3 MCU for embedded control
The Texas Instruments LM3S613-IGZ50-C2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 600 series, clocked at 50 MHz. It carries 32 KB of Flash program memory and 8K x 8 of SRAM, with 32 general-purpose I/O lines and a 4-channel 10-bit ADC.
50 MHz core — what it means for throughput
At 50 MHz, the Cortex-M3 core delivers single-cycle multiply and hardware divide, which translates to deterministic interrupt latency and efficient bit-banging for protocols like SPI and UART. The 32 I/O lines and connectivity set (I²C, Microwire, SPI, SSI, UART/USART) let this MCU handle mixed-sensor interfaces and serial-communication bridges without an external UART or SPI expander.
32 KB Flash and 8K x 8 RAM — firmware footprint limits
The 32 KB Flash is sized for moderate firmware — bootloader, main control loop, and a few protocol stacks fit; a full TCP/IP stack or complex GUI would overflow. The 8K x 8 SRAM supports a handful of moderate-size buffers; watch the stack depth and DMA buffers when using the ADC and serial peripherals concurrently.
Industrial temperature grade and package
Rated -40°C to 85°C, this MCU is qualified for outdoor telecom cabinets, factory-floor enclosures, and under-hood automotive auxiliary modules (non-safety-critical). The exposed pad requires a thermal via pattern under the pad for adequate heat dissipation when running peripherals at full duty cycle.