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PSoC™ 5, 3 & 1 Forum Discussions

user_3716231
Level 4
Level 4
10 sign-ins 5 sign-ins 10 questions asked

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?

Capture.JPG

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4 Replies
LinglingG_46
Moderator
Moderator
Moderator
10 questions asked 5 questions asked 250 sign-ins

Which device do you use?

Which project I can reproduce your issue?

 

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Vison_Zhang
Moderator
Moderator
Moderator
250 solutions authored 10 likes given 500 replies posted

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
Level 4
Level 4
10 sign-ins 5 sign-ins 10 questions asked

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
50 sign-ins 10 likes received 5 likes given

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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