Core specs and BOM-fit check
The LM3S316-EGZ25-C2T: That 25 MHz ceiling and 16 KB flash size define the firmware budget — it fits control loops and moderate data logging, not a full RTOS with heavy middleware. The -40°C to +105°C temperature range means it handles industrial enclosures and motor-drive compartments without derating.
The exposed pad is the ground return — a solid pour on the inner layer keeps the thermal impedance low. 32 GPIO lines are available for sensor inputs, LED drivers, or keypad scanning. Four 10-bit ADC channels handle analog feedback from potentiometers or current-sense resistors without an external converter. Serial interfaces include I²C, SPI, SSI, UART/USART, and Microwire — enough to talk to common peripherals like EEPROM, temperature sensors, or serial LCDs. The UART baud rate at 25 MHz is flexible down to standard 9600/115200.
On-chip supervisory and system robustness
Built-in brown-out detect and power-on reset (POR) monitor the supply rail — no external supervisor IC needed for basic voltage monitoring. The watchdog timer (WDT) recovers the system from firmware hangs, which matters for unattended equipment. PWM outputs are available on-chip for dimming LEDs or driving small DC motors with a simple H-bridge. The internal oscillator runs the core without an external clock source, cutting two components from the BOM.
Lifecycle and sourcing posture
Supplied in tape and reel (TR) packaging for automated pick-and-place.