if the processor locks up the only to do a full reset is to pull PMIC_PGOOD low which pulls PORZ low which will cold reset the IC. the internal WDT only does warm resets which will do no good unless something in the processor is paying attention to it.
so for full bullet proof operation yes you need an external WDT. On 1/20/2016 10:02 AM, [email protected] wrote: > Were you able to get any clarification here? I'm running into the > same issue but it seems this is still an open question. > > On Monday, October 19, 2015 at 8:25:01 PM UTC-4, [email protected] > wrote: > > Currently trying to get the watchdog on the BBB working. > > It works fine when the code stops running, but from what I gather, > it is an embedded circuit, so it should work if the processor > freezes up. > > Am I wrong here? Do I need to buy an external watchdog for when > the BBB completely locks up? > > I run the watchdog, and then run a halt -f command. The BBB > freezes up, doesn't perform a shutdown though. > > The watchdog never reboots the BBB. > > I've tried playing with the NOWAYOUT setting in the > /etc/watchdog.conf file but that didn't seem to work. > > Thanks for any help, > > Daniel > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google > Groups "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
