Stellaris LM3S6G65 — what you get on this die
The LM3S6G65-IQC80-A1T: The 100-LQFP package gives you 46 general-purpose I/O and a 16-channel 12-bit ADC.
Integrated Ethernet — saves a PHY and a layout headache
The on-chip Ethernet MAC+PHY eliminates the external PHY chip, magnetics transformer aside, and the associated clock and decoupling components.
Flash and RAM sizing — enough for a TCP/IP stack plus app code
The 64 KB RAM is organised as 64K x 8, which is sufficient for packet buffers and a modest heap. If you need to stage an OTA update, the 512 KB Flash gives you room for a dual-bank strategy with a fallback image.
Peripherals set for motor control and sensor fusion
The peripheral list includes PWM, QEI, DMA, watchdog, brown-out reset, and POR. The 16-channel 12-bit ADC can sample current-sense resistors and position sensors simultaneously.
Lifecycle and supply — active, no end-of-life pressure
That means it is safe to qualify for a new design with a multi-year production horizon.