What this part is and where it fits
The Texas Instruments LM3S6110-EQC25-A2 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 6000 series, clocked at 25 MHz. It carries 64 KB of Flash and 16 KB of RAM, with 35 general-purpose I/O lines in a 100-pin LQFP package. The on-chip Ethernet MAC makes this part a natural fit for industrial gateways, remote terminal units, or any control node that needs a direct twisted-pair link without an external MAC chip. The -40°C to 105°C temperature rating suits it for outdoor telecom cabinets, factory-floor enclosures, or engine-bay-adjacent electronics.
25 MHz core and Ethernet — what they mean for the BOM
The 25 MHz Cortex-M3 core handles protocol parsing and Modbus TCP bridging. The Ethernet MAC saves an external MAC chip and PCB area.
Obsolete — sourcing reality
Peripherals and connectivity
The chip includes UART/USART, SPI, SSI, Microwire, and IrDA serial interfaces. The internal oscillator saves a crystal for non-critical timing.