Check on Corrupted PHY ( TJA1100)

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Check on Corrupted PHY ( TJA1100)

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ahmedsaber
Contributor I

Hello,

For PHY TJA1100, if the chip itself has a HW malfunction or corrupted on the level of the HW.

Is there somehow any way or mechanism to know that ?

Thanks

Ahmed Saber

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ahmedsaber
Contributor I

Hello Igor,

Thanks for your reply.

I took a look in the Datasheet and the application note, to find that we can test the Transceiver if it still working correctly or not by putting one of the Loop back mode, as shown in screenshot, in my case I need to test the external loop back mode

Capture.PNG

But there is no mention, what should I do after I put the Trcv in that mode

shall I send a message and then listen on the receive side till I got a reception and compare between the sent and the received one

and check if they are the same.

or what?

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Ahmed

 you are right, send, receive and compare.
 

Best regards
igor

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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Ahmed

 for diagnosis one can try loopback mode described in

AN12088 Application hints for TJA1100 :

https://www.nxp.com/docs/en/application-note/AN12088.pdf 

Best regards
igor
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