Does boot ROM run when Watchdog reset asserted in i.MX7S?

[T-Ii]

Hi, all.

I want to know whether boot ROM run or not when watchdog reset asserted.

My customer's product sometimes not wake up from Low Power mode.

I want to find it comes from errata e10574 or not.

Thanks.

[Rita_Wang]

Which version BSP are you using?

[T-Ii]

Customer doesn't use BSP based OS but proprietary RTOS.

Which point does BPS version affect to watchdog reset?

[Rita_Wang]

ROM code will start immediately after POR_B deactivated.

[T-Ii]

Thank you for replying.

Let me confirm my understand.

A. boot ROM does not run when watchdog asserted without WDT bit set. (see Figure 6-16. below)

B. boot ROM run when watchdog asserted with WDT bit set. (see Figure 6.17. below)

C. errata e10574 happens in either case.

Is my understanding right?

Thanks

[Rita_Wang · Accepted solution]

Yes