64 KB FRAM — what it means for firmware strategy
64 KB of FRAM is the program store, not a separate EEPROM. Unlike Flash, FRAM tolerates byte-by-byte writes at full speed with no erase cycle, so you can treat a portion of the 64 KB as non-volatile data storage — calibration constants, last-known state, event logs — without a dedicated EEPROM chip. The 2 KB of SRAM handles stack and scratchpad.
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Brown-out detect, POR, DMA, PWM, WDT. Internal oscillator.