16 MHz CPUXV2 core with 128 KB FRAM — what that means for the BOM
The Texas Instruments MSP430FR68791IPZR is a 16-bit MSP430 CPUXV2 microcontroller running at 16 MHz, with 128 KB of FRAM program memory and 2 KB of RAM. FRAM writes at bus speed and holds data without a backup battery — no EEPROM wear-leveling code needed, no Flash page-erase delays during field updates. The 16 MHz clock is enough for real-time sensor polling, LCD segment drive, and Modbus RTU frames on the UART.
Industrial temperature grade and package
Rated -40°C to 85°C, this MCU fits factory-floor controllers, outdoor telecom pedestals, and engine-bay-adjacent electronics without a heater or active cooling. The 100-LQFP package (14x14 mm body) is a common footprint for panel-mount PCBs; 83 I/O pins leave room for a parallel LCD, keypad matrix, and a dozen discrete sensors.
Peripherals and connectivity
On-chip peripherals include a 16-channel 12-bit ADC, brown-out detect, DMA, POR, PWM, and a watchdog timer. Connectivity covers I²C, IrDA, SCI, SPI, and UART/USART — enough for a mixed-sensor bus (SPI for an external ADC, I²C for a temperature sensor, UART for a radio module). The internal oscillator keeps the BOM count low; no external crystal needed for 16 MHz operation.