What this part is — and what it does
The LM3S5K31-IQC80-C3T is a 32-bit ARM Cortex-M3 microcontroller from TI's Stellaris 5000 series, clocked at 80 MHz with 128 KB of Flash program memory and 24K x 8 SRAM. It carries a full-set peripheral list: CAN, USB, multiple UART/USART, I²C, SPI, and a 16-channel 10-bit ADC, making it suited for industrial control nodes, motor-drive interfaces, and sensor hubs that need a single-chip CAN or USB bridge. The industrial temperature range (-40 to 85°C) supports outdoor telecom cabinets, factory-floor PLC I/O slices, and under-hood automotive modules.
80 MHz — what it buys you on the bus
80 MHz core speed with a single-cycle multiply. The 24K x 8 SRAM is tight for large data buffers.
Package and footprint
100-pin LQFP (14x14 mm body), surface-mount. The 67 GPIOs are distributed across all four sides.