LPC55S6x SD Card Response Timeout

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LPC55S6x SD Card Response Timeout

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alee1
Contributor I

On the LPC55S6x I am getting a response timeout after CMD 8 for the SD card is called.  

alee1_0-1660071880404.png

It does not seem to be a hardware issue, because I used an oscilloscope to verify that a response is sent. 

alee1_1-1660071956822.png

The dark blue waveform is the clock, and the dark pink is the response. 

 

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Alice_Yang
NXP TechSupport
NXP TechSupport

Hello,

How about first test the sdcard examples under sdk, does it can work well?

Alice_Yang_0-1660205872036.png

 

BR

Alice

 

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alee1
Contributor I

I have tested the sd card interrupt example and it did not work. As yo u cna see, the program does not continue after CMD 8. The sd card cannot initialize, so I doubt any of the examples can work. It stops at the function ProbeBusVoltage. 

alee1_0-1660232553454.png

 

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Alice_Yang
NXP TechSupport
NXP TechSupport

Hello alee1,

Which SDK version do you used? How about the latest version SDK v2.12.0? 

Do you use LPCxpresso55s69-evk board?

And what  about your  card capacity?

 

BR

Alice

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