A question on automatically rebooting if BBB hangs

[Eric Berg]

I'm looking at using a BBB in an embedded system. I have a 555 that I'm using as a watchdog which the BBB would reset every so many seconds. If a minute goes by and the 555 hasn't received a reset from the BBB then it would time out and send a signal (either high or low) to the BBB forcing it to reboot itself. Is there a pin on the GPIOs that will allow me to reboot the BBB? I noticed there is a sys_reset pin on the BBB. Would driving this pin low force a reboot? I've searched on Google for answers to this question but I'll be darned if I can find anything other than "push the power button".