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PCH does not work after power button

steel
Beginner
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Hello.

I made my own board with COFFEE LAKE H.

I am making a control program referring to the '45.4 Power Sequencing' item in the PDG document. All of the VCCPRIM power is applied to the PCH, However, even after pressing the power button, SLP_S5# is always in assert state.

Of course it doesn't go to S4 and S3.

When I press PWRBTN for about 4 seconds, SLP_A# turns off and on, so PCH seems to work. However, it does not work after S5#.

I understood DSW_PWROK -> RSMRST -> PWRBTN -> S5#, but it stopped from S5#.

THANKS

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Jocelyn_Intel
Employee
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Hello, @steel

 

Thank you for posting on the Intel® communities.  

 

For assistance with your own board, please visit the Intel Developer Zone, where you can get the assistance you need regarding your inquiries and more. 

 

Best regards,  

Jocelyn M.   

Intel Customer Support Technician. 


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