TPS3305. how to disable Watchdog feature

Elena Palladini

Other Parts Discussed in Thread: TPS3305

What does it happen if I left unconnected the WDI pin on the Dual processor Supervisor TPS3305?
How can I disable the watchdog function?
Thank yuo for your help,
EP

over 14 years ago

0 Igor Sherer over 14 years ago

Guru 31280 points

Hi Elena,

Have you read the "Disabling the Watchdog Timer for TI’s Family of Supervisors" document?

What happens if you leave the WDI pin disconnected (I haven't found any info regarding leaving

this pin unconnected)?

Br,

Igor

0 Elena Palladini over 14 years ago in reply to Igor Sherer

Prodigy 20 points

Igor,

I think that this application solves any doubts.

So if I don't use the watchdog feature it is enough to leave unconnected the WDI pin.

Thank for your support,

Elena

0 Igor Sherer over 14 years ago in reply to Elena Palladini

Guru 31280 points

Hi Elena,

As I'm not familiar with the device and I haven't found anything in the datasheet

regarding leaving the WDI pin unconnected, I strongly recommend you to check

the behavior of this device when the WDI pin is floating.

Br,

Igor

0 Hughie Lu over 14 years ago in reply to Igor Sherer

TI__Prodigy 600 points

Hi Elena,

Per TI application report (SLVA145) that Igor mentioned, you can definitely leave WDI pin unconnected to disable the watchdog. If you want to enable watchdog again, just simply input the transition signal (high and low) to the WDI pin.

Regards,

Hughie Lu

Power management

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TPS3305. how to disable Watchdog feature