50 MHz Cortex-M3 with Ethernet and CANbus — industrial networking on a single chip
The Texas Instruments LM3S8730-EQC50-A2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris 8000 series, clocked at 50 MHz with 128 KB Flash and 64 KB SRAM. The 2.25 V to 2.75 V supply range and -40°C to 105°C rating suit it for outdoor telecom cabinets or engine-bay electronics where the ambient can swing hard.
128 KB Flash and 64 KB SRAM — sizing the firmware and data buffers
The 128 KB Flash holds a moderate-size application stack — think a TCP/IP stack with a CANopen node and a few control loops. The 64 KB SRAM gives enough headroom for Ethernet packet buffers and a real-time data log without external memory. If your firmware needs more than that, you are looking at a larger Stellaris or a Cortex-M4 part; for a typical industrial node this pair is well matched.