Is an external pull-up required on WAKEUP pin?

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japac_1817436
Level 1
Level 1

I want to use the Stop mode of CYBLE-012011-00 in my project.

   

I know that only the pins XRES and WAKEUP (P2[2] for CYBLE-012011-00) can be used to wakeup the device from stop mode.

   

The question is whether if an external pull-up resistor is required on the WAKEUP pin.

   

I do have an example project that seems to work with a switch attached to P2[2], P2[2] set as resistive pull up and the polarity of the wakeup pin set to active low, but I just want to check before I design my custom PCB.

   

Thank you.

   

Jaemann

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3 Replies
Bob_Marlowe
Level 10
Level 10
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AN86233 tells, that all GPIO settings and states will be frozen. Thus would mean that the internal pullup and state = high will be maintained during stop mode. 

   

 

   

Bob

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japac_1817436
Level 1
Level 1

Thank you for the confirmation.

   

I have one more question.

   

I know that PSoC 4 and PRoC are different devices with different functionalities. But sometimes, I cannot seem to find the exact documentation for PRoC devices, e.g. System Reference Guides in PSoC Creator only point to documentation for PSoC 3/4/5LP devices. In these cases, can I resort to documentation for PSoC 4s?

   

I have just started to work with these devices and it is a little confusing yet.

   

Jaemann

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Bob_Marlowe
Level 10
Level 10
First like given 50 questions asked 10 questions asked

In Creator, Workspace Explorer window (left hand side) there is a tab named Datasheets. There you will find a link to your selected device datasheet.

   

 

   

Bob

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