2.3.6 nRSTO (RESET Output) Pin

Pin nRSTO is an active-low, open-drain output pin that keeps the MPU in RESET state. The nRSTO pin is released (i.e. goes High-Z) with a programmable delay upon successful completion of a Start-Up Sequence. The RESET delay is programmable over a wide range of values, as shown in section Reset Assertion Delay (t₄) Programming Bits, and the default is 4 ms. nRSTO is immediately asserted low when either the SVIN voltage falls below the UVLO threshold, or a fault condition is detected at system level (such a Thermal Shutdown) or an overcurrent condition is detected on the Buck channels. Please see section Protections for more details on the faults that would cause the nRSTO signal low assertion. nRSTO goes also low when the HIBERNATE mode is entered.