How to detect SPI PCS signal for MPC5746C?

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How to detect SPI PCS signal for MPC5746C?

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fans
Contributor I

   Some devices may interpret SPI data after CS from low(active) to high.So TCF in SR register can't indicate if the whole SPI process has completed.

   I have to add a time filter although it's not a good solution, so is there any other solution or relevant flag to detect CS signal?

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davidtosenovjan
NXP TechSupport
NXP TechSupport

Hi, could you please elaborate the question more in detail? I am not sure if I understand you. Thanks

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fans
Contributor I

SBC caputure.JPG

The transmission is considered successful only after CS from LOW to HIGH for this chip. In practice, I want to detect CS signal to judge whether the data received by device is actually processed.

Thanks for your reply.

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davidtosenovjan
NXP TechSupport
NXP TechSupport

OK

You don't need to detect it. Use TFFF and/or RFDF flags to find out wheter it is needed to push/drain the data.

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