LP-MSPM0G3507: How to set independent watch dog timer.

Vivek Chitte

Prodigy 155 points

Part Number: LP-MSPM0G3507
Other Parts Discussed in Thread: MSPM0G3507

How can we set an independent watchdog timer in MSPM0G3507?

I read the datasheet, and it only mentions Window Watchdog, can you please tell me how to set it up?

or what its settings are in the sys config.

over 1 year ago

0 Brandon Fisher94 over 1 year ago

TI__Mastermind 28075 points

Hi Vivek,

The MSPM0G3507 does not have an independent watchdog, only 2 window watch dog timers.

Best Regards,
Brandon Fisher

0 Vivek Chitte over 1 year ago in reply to Brandon Fisher94

Prodigy 155 points

Hi Brandon,

Can we use a window watchdog timer as an independent watchdog?

WWDT0 or WWDT1?

0 Brandon Fisher94 over 1 year ago in reply to Vivek Chitte

TI__Mastermind 28075 points

Hi Vivek,

That depends on what you mean by independent watchdog. In most cases I would say no, as the term independent watchdog usually means a requirement for an independent clock source and possibly also an alternate supply. The clock source for the two WWDTs would be shared with the rest of the device, as would the supply.

There are future devices in the MSPM0 portfolio planned which will have independent watchdog timers available. I would reach out to your TI sales representative for details.

Best Regards,
Brandon Fisher

0 Vivek Chitte over 1 year ago in reply to Brandon Fisher94

Prodigy 155 points

Hi Brandon,

Thank you for the clarification.

Can you please explain the details in the image I have attached?

0 Brandon Fisher94 over 1 year ago in reply to Vivek Chitte

TI__Mastermind 28075 points

Hi Vivek,

That paragraph is essentially just saying the LFCLK is independent from other potential MCLK sources, which is true when MCLK is not being sourced from LFCLK.

If that is enough for your application then you just have to configure the WWDT to run from LFCLK.

If you are using an external low frequency clock source, and using LFCLK as the WWDT0/1 clock, then you should also enable the LFCLK Monitor so you will receive an NMI if the LFCLK source fails.

Best Regards,
Brandon Fisher

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LP-MSPM0G3507: How to set independent watch dog timer.