What this part is and where it fits
The LM3S1R21-IBZ80-C5 is a 32-bit ARM Cortex-M3 MCU from TI's Stellaris series, running at 80 MHz with 256 KB of Flash and 48 KB of RAM. It carries 67 general-purpose I/O lines and a broad connectivity set that includes EBI/EMI, I²C, SPI, UART, IrDA, LIN, and Microwire.
