LPC55S69 : wakeup due BoD

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LPC55S69 : wakeup due BoD

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EugeneHiihtaja
Senior Contributor I

Hello !

I need BoD type of wakeup when voltage start to drop below some level.

But looks like it is not possible to wakeup MCU from Power-down mode due BoD type of interrupt.

Can AnalogComparator used in similar way ?

It is not so clear how to initialize it and how some external pins should be used .

Do you have any application note for it or any example usage of it ?

Regards !

Eugene

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Sabina_Bruce
NXP Employee
NXP Employee

Hello Eugene,

 If the BOD reset is enabled, the forced BOD reset can wake up the chip from reduced power modes, not including power-down and deep power-down.

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Yes the analog comparator can be used to wake up the system. An example code is provided in section 14.5.2.4 of the User Manual.

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The pins you are able to use for the analog comparator are the following:

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Could you please specify if you are getting an error when attempting to initialize these pins. This way I can check your code.

Best Regards,

Sabina

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