i.MX6ULL Watchdog

[bimal]

Hi,

In our design i want to enable watchdog feature. Where i found it have Watchdog Reset_b and Watch_dog_any pins available. I didn't found any signal description. Which pin will work how?

- What is signal Watchdog_Reset_b out pin? Is this Active Low or Active High?, what will be duration of the pulse?

- What is signal Watch_dog_any pin? Is this Active Low or Active High?, what will be duration of the pulse?

- I am planning to give Watchdog output to i.MX6ULL nPOR pin, Is this feasible?

[gusarambula]

Hello Bimal Makwana,

WDOG_B is low active and according to the following thread, the WDOG1_ANY, as a Global WDOG signal, would go low if any of the WDOGn_B signals go low (get asserted) and the power down for the chip is signaled.

https://community.nxp.com/message/860625

You may find the WDOG reset timing parameters are listed on section 4.9 of the i.MX6UL Datasheet (link below).

http://www.nxp.com/assets/documents/data/en/data-sheets/IMX6ULCEC.pdf

You may use the Watchdog output to the POR pin using the WDOGn_RST_B_DEB, which serves as an output signal for reset. It’s similar to what’s implemented on the i.MX6UL EVK using discrete power management and on the i.MX6Q Sabre SDP using a PMIC.

I hope this helps!

Regards,