The Texas Instruments LM3S9B92-IQC80-C3T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 9000 series, clocked at 80 MHz with 256 KB of Flash program memory and 96 KB of SRAM. It integrates an Ethernet MAC, USB OTG, CANbus, and a 16-channel 10-bit ADC, making it a fit for networked control nodes, HMI panels, and industrial gateways that need wired connectivity without an external PHY or USB controller. The 100-LQFP package (14×14 mm) keeps the board footprint compact for a part with this peripheral set.
At 80 MHz, this Cortex-M3 can execute a tight PID loop or Modbus TCP stack with headroom for a small RTOS. The 96 KB SRAM supports moderate packet buffers for Ethernet and USB traffic without external memory. For a panel retrofit or gateway design, the 80 MHz speed is enough to handle a few hundred register updates per second over Ethernet and CAN simultaneously.
The 1.235 to 1.365 V core supply is tight — the board designer must keep the regulator output within that window across load and temperature.