The LM3S9L97-IBZ80-C5: 32-bit ARM Cortex-M3 microcontroller from the Stellaris 9000 series, clocked at 80 MHz with 128 KB of Flash and 48 KB of RAM.
80 MHz Cortex-M3 — what the clock buys you
At 80 MHz the ARM Cortex-M3 core delivers enough throughput to run a lightweight TCP/IP stack alongside a CANopen master and a Modbus RTU slave without a co-processor. The integrated Ethernet MAC handles the frame-level work; the CPU stays free for application logic and the dual CAN controllers manage bus arbitration. For a design that previously needed a separate Ethernet controller or a second MCU for the CAN gateway, this part collapses the BOM.