The Texas Instruments LM3S815-IQN50-C2 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® 800 series, clocked at 50 MHz. It carries 64 KB of Flash and 8 KB of RAM, 34 GPIOs, and a 2-channel 10-bit ADC.
NRND — the sourcing decision
The LM3S815-IQN50-C2 carries an NRND (Not Recommended for New Designs) status. Texas Instruments has not published a final EOL notice for this specific variant, but the NRND flag means the window for last-time-buy is open now.
Peripherals and connectivity
On-chip peripherals include a brown-out detect, POR, PWM, and a watchdog timer — enough to run a standalone controller without an external supervisor. The serial interface set covers I²C, Microwire, SPI, SSI, and UART/USART, so it can talk to most common sensors, ADCs, and display modules. The two 10-bit ADC channels handle analog feedback from a potentiometer or a current-sense resistor.