WKUP pin - which edge (rising/falling) and can it still be monitored when MCU is running ?

[freeflyer]

Follow-on from STM32L433RCT6 - Which external interrupt GPIO pin can I used for wakeup ?

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I am using the STM32L433RCT6 with a WKUP pin (GPIO PC13) to wake the MCU from shutdown mode.

Does it matter which edge I used (rising or falling) ?

I am currently using a switch to ground (i.e. falling edge)...

Also, once the MCU is awake and running, am I still able to read this pin as a digital input ?

Because the switch will also be used to put the MCU back into standby, so I need to be able to monitor the state of the WJUP pin.

[Andrew Neil]

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@freeflyer wrote:

Does it matter which edge I used (rising or falling) ?

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See the Datasheet; eg,

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@freeflyer wrote:

once the MCU is awake and running, am I still able to read this pin as a digital input ?

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Yes.

[freeflyer]

Thanks Andrew, I did see that the edge is configurable.

I was just wondering if there is an advantage to using one edge compared to another, such as power consumption etc