# Watchdog for always-on processor

Source: [https://docs.qualcomm.com/doc/80-88500-4/topic/69_Watchdog_for_AOP.html](https://docs.qualcomm.com/doc/80-88500-4/topic/69_Watchdog_for_AOP.html)

There is no software watchdog (WD) for always-on processor (AOP). The hardware WD is
    automatically stopped when the hardware debugger is attached to AOP.

The software on AOP must pet the AOP WD hardware. If AOP does not pet it for 10 ms, an AOP WD
      bark is fired and the software on AOP  handles it, and it eventually leads to an AOP error
      fatal.

If the software on AOP cannot handle the AOP WD bark, then an AOP WD bite is fired. AOP is
      reset by the WD hardware and a notification is sent to HLOS on the application processor. The
      application processor then falls into panic.

**Parent Topic:** [Watchdog](https://docs.qualcomm.com/doc/80-88500-4/topic/68_Watchdog.html)

Last Published: Aug 18, 2023

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