What this MSP430 FRAM MCU brings to the BOM
The Texas Instruments MSP430FR6989IPZ is a 16-bit MCU running at 16 MHz with 128 KB of FRAM and 2 KB of SRAM. Connectivity covers I²C, IrDA, SPI, and UART/USART. The 83 GPIOs in a 100-LQFP package give ample headroom for segmented displays, keypads, and sensor arrays. Operating from 1.8 V to 3.6 V across -40 to 85°C, it fits industrial control panels, outdoor metering, and battery-powered instrumentation where the FRAM's low active power and instant-on wake are decisive.
128 KB FRAM — what it means for firmware and field updates
The 128 KB FRAM supports byte-level writes without erase cycles, enabling field data logging and firmware updates.
Pinout and programming tool
The 100-LQFP (14×14 mm) pinout follows the standard MSP430FR69xx family mapping. Programming and debug use TI's Spy-Bi-Wire (SBW) two-wire interface, supported by the MSP-FET programmer or the LaunchPad development kit. No external oscillator is required — the internal oscillator runs the core at 16 MHz.