The LM3S5651-IBZ80-C3: 32-bit ARM Cortex-M3 MCU, 80 MHz, 128 KB Flash, 32K x 8 SRAM. Peripherals include USB OTG, CAN, I²C, SPI, SSI, UART, LIN, IrDA, 16-channel 10-bit ADC, PWM, and QEI.
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This part is obsolete. The last-time-buy window has passed; production ceased. Any available units are from surplus or broker channels.
80 MHz Cortex-M3 — what it means for your design
The 80 MHz core on this Stellaris MCU handles real-time control loops and protocol stacks without external memory. The 128 KB Flash is enough for moderate firmware loads; the 32K x 8 SRAM supports a modest RTOS heap and data buffers. The USB OTG peripheral adds host/device flexibility for field-update or data-logging applications.