KW45 : SWICH_WAKEUP_B pin

[Chan_17]

Hi NXP Team,

Can we get detailed use of SWICH_WAKEUP_B pin in kw45 , any use case or application note for the use of this pin . If we give external interrupt on this pin , then how does it behave ,is there any special advantage? How to use it in application in this scenario , which interupt sorce to check? 

[luis_maravilla]

Hello

The Wake-Up button wakes up the target MCU(KW45) from Deep Power-Down mode, there is SDK Documentation that maybe can refer you on the Low power mode and how the behavior of the Low power mode with the wake-up sources work.

SDK Documentation Low Power Management: Low-Power Management — MCUXpresso SDK Documentation

On the KW45 EVK User Manual figure 5 We can see Push button circuit diagram

For more information about this please refer to the User Manual: KW45B41Z-EVKUM

If you need to modify for your application, I would recommend checking on the [fsl_component_button.h] file in the SDK, for description on how the functions for the button are called.

Best Regards

Luis