Overview
The F-RAM Integrated Processor Companion features a general-purpose comparator that you can use to generate an early power-fail warning. This warning signal can be used to drive a microcontroller interrupt input. It should occur before VDD drops too low to provide the system with enough time to save critical data to a nonvolatile RAM. The early power-fail interrupt can also be used as a warning to the system to stop conducting critical activity during a brownout condition.