The FM32xx is a family of integrated devices thatincludes the most commonly needed functions forprocessor-based systems. Major features includenonvolatile memory available in various sizes, low-VDD reset, watchdog timer, nonvolatile event counter,lockable 64-bit serial number area, and generalpurpose comparator that can be used for an earlypower-fail (NMI) interrupt or other purpose. Thefamily operates from 2.7 to 5.5V.The FM32xx family is software and pinoutcompatible with the FM31xx family which alsoincludes a real-time clock. The common featuresallow a system design that easily can be assembledwith or without timekeeping by simply selecting theFM31xx or FM32xx, respectively.Each FM32xx provides nonvolatile RAM available insizes including 4Kb, 16Kb, 64Kb, and 256Kbversions. Fast write speed and unlimited enduranceallow the memory to serve as extra RAM orconventional nonvolatile storage. This memory istruly nonvolatile rather than battery backed.
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