TPS386000 WDI WDO

Kei Sato73562

Expert 2310 points

When I do not use WDI and WDO.
How should the pin of WDI and WDO do it?

over 13 years ago

0 Darwin Fernandez over 13 years ago

TI__Mastermind 41800 points

Sato-san,

If the WDI is not desired, you must leave WDI and WDO open circuited.

Regards,

Darwin

0 Paul von Hase over 12 years ago in reply to Darwin Fernandez

Prodigy 210 points

Darwin,

why should WDI be left floating?

Usually it is not the best idea to leave inputs floating and the TPS3860x0 spec doesn't state WDI has an internal PU or PD.

Please also kindly note that WDI doesn't affect any other circuitry inside the chip but WDO (WDT).

My suggestion therefore would be to tie WDI to GND, while leaving WDO open. Btw, in the spec all data of the TPS3860x0 (despite power consumption) was specified with WDI tied to GND.

Regards

Paul

0 Darwin Fernandez over 12 years ago in reply to Paul von Hase

TI__Mastermind 41800 points

Hi Paul,

As long as WDO is open circuited. WDI can also be grounded if WD is not being used.

Regards,

Darwin

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TPS386000 WDI WDO