80 MHz Cortex-M3 with industrial-grade peripherals
The Texas Instruments LM3S5791-IQC80-C5T is a 32-bit ARM Cortex-M3 MCU from the Stellaris family, clocked at 80 MHz with 128 KB of Flash and 64 KB of RAM. It carries 72 general-purpose I/O lines and a dense peripheral set including CAN, USB OTG, multiple UART/USART, SPI, I²C, and an integrated 16-channel 10-bit ADC. The part is specified across the -40°C to 85°C industrial temperature range and comes in a 100-pin LQFP package (14x14 mm body). This combination of core speed, memory, and connectivity makes it a fit for industrial control nodes, motor-drive communication bridges, and gateway applications that need to aggregate CAN and serial fieldbuses onto a USB host interface.
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80 MHz — what it means for the bus
The 80 MHz core clock on this Cortex-M3 supports a 3-stage pipeline. The 64 KB SRAM is organized as 64K x 8.