FRAM-based 16-bit MCU for low-power sensor and control designs
The MSP430FR2522IRHLR: Its 7.5KB of FRAM program memory combines the non-volatility of Flash with the write speed and endurance of RAM — no erase cycles, no wear-leveling overhead, and byte-addressable writes that simplify firmware updates and data logging.
The supply voltage range of 2V to 3.6V covers single-cell Li-ion and 3.3V regulated rails, with brown-out detection and a watchdog timer for reliable operation in noisy or fluctuating power conditions.
The 15 I/Os are enough for a handful of sensor inputs, a serial bus, and a few control outputs, but do not expect to route a parallel display or external memory bus; this is a lean, integrated-node MCU.
Pin-compatible siblings in the MSP430FR2xx family with different FRAM densities can be dropped into the same footprint without PCB changes.