FRAM MCU for metering and display applications
Its standout feature is 64KB of FRAM program memory — non-volatile, fast-write, and unified with data storage — which eliminates the separate EEPROM or Flash sector management that traditional MCUs require.
16MHz CPUXV2 — enough for real-time sensor polling and display refresh
The 16MHz clock rate on the MSP430 CPUXV2 core is not a raw throughput number — it is the sweet spot for this family's ultra-low-power active mode. At 16MHz the core can poll a sensor, update a segment LCD, and log data to FRAM in a single active burst before dropping back to sleep. The internal oscillator means no external crystal is needed for many applications, though the peripheral clock tree can still run a real-time counter from a 32 kHz watch crystal if the application demands it. For designs that need deterministic interrupt response, the 16-bit RISC pipeline delivers single-cycle multiply and hardware multiplier support without wait states from FRAM at this speed.
64KB FRAM — no wear-leveling, no erase cycles, no separate EEPROM
FRAM writes at bus speed and consumes roughly 250x less energy per byte than Flash. For a metering application that logs consumption data every second over a ten-year product life, FRAM handles over 10^15 write cycles — effectively unlimited. The 64KB space is unified: code and data share the same memory map, so calibration constants, configuration tables, and firmware patches all live in the same FRAM array without sector-erase overhead. The 2K x 8 RAM handles stack and scratchpad; FRAM handles the rest. This architecture simplifies the firmware engineer's job and reduces BOM cost by removing the external serial EEPROM that a Flash-only MCU would need for non-volatile data storage.
Supply range and temperature — industrial-grade operation
Brown-out detect and POR are integrated, so the reset circuit is internal — no external supervisor IC needed. The 56-TSSOP package with 0.65mm pitch is a standard footprint for hand-assembly or reflow, and the exposed pad (if present on this variant) should be stitched to ground with thermal vias if the application draws sustained current above a few mA.
Texas Instruments continues to manufacture this part, and no last-time-buy or end-of-life notification has been issued. The base product number MSP430FR6922 covers multiple package and temperature variants, so a PCN affecting one package option would not necessarily impact the 56-TSSOP version.
Sourcing this part for your BOM
For a production BOM line, the 56-TSSOP package and active lifecycle mean the part can be dual-sourced across multiple TI-authorized channels without qualification risk. If your design requires the same FRAM and LCD feature set in a smaller footprint, the MSP430FR6922 family includes a 48-pin QFP variant; pin compatibility should be verified against the specific package drawing before swapping.