AN-B-056 Application Note: DA1468x Recovery from System Level ESD Events

This document describes a method to recover the DA14680/681 from a possible system level ESD event. Such an ESD event might happen in applications using the external 32.768kHz crystal. The document presents a simple and cheap external Watchdog Circuit to Reset the DA14680/681 and recover from the event. Applications using the internal RCX oscillator and no external 32.768 KHz
crystal do not require this circuitry.