There is an abnormal spike when analyzing SPI line

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user_3716231
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Level 4
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I use Analog Discovery 2 to analyze SPI line and there is an abnormal spike during SS is set to low. How do I elimenate it?

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pacr_284376
Level 5
Level 5
100 replies posted 10 solutions authored 50 sign-ins

The SPIM_1 component switches SS to '0' before and to '1' after SPI communication.

You manually use the command SS_1_Write() 

You need to make up your mind : Automatic Control SS via MSPI_1 component OR manually SS_1_Write(). NOT BOTH !

 

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LinglingG_46
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500 solutions authored 1000 replies posted 10 questions asked

Which device do you use?

Which project I can reproduce your issue?

 

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Vison_Zhang
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First comment on KBA 750 replies posted 250 sign-ins

Look like hardware crosstalk noise, please use an oscilloscope to capture the signal waveforms, do not use logic analyzer

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user_3716231
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Level 4
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I use CY8CKIT-059 and attach is the project. My oscilloscope is Analog Discovery 2 and I want to know if it is the oscilloscope issue.

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pacr_284376
Level 5
Level 5
100 replies posted 10 solutions authored 50 sign-ins

The SPIM_1 component switches SS to '0' before and to '1' after SPI communication.

You manually use the command SS_1_Write() 

You need to make up your mind : Automatic Control SS via MSPI_1 component OR manually SS_1_Write(). NOT BOTH !

 

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