Hi
My customers are testing SERDES with the configuration of DS90UB927 and DS90UB928. (Transmit data to DIFFERENTIAL using STP CABLE)
However, when the serializer (DS90UB927) calls the Deserializer (DS90UB928) using I2C, the SERDES lock is broken (the lock pin drops to low).
When calling Deserializer, we confirmed that Neck was returned from Deserializer, and confirmed that 0X0C of DS90UB927 was "01".
So I tried the test by connecting DS90UB928 EVM, but the lock is still broken. However, remote control of the 927 to 927 registers works normally.
And until the serializer calls the deserializer, it is confirmed that the lock is maintained well.
Could you advise me on why this is happening?
Is there a point I can check?
Below are all the settings that are changed from the default value in Serializer before calling Deserializer.
And 927,928 peripheral circuits are attached as follows.
Please ask for a review.
However, when the serializer (DS90UB927) calls the Deserializer (DS90UB928) using I2C, the SERDES lock is broken (the lock pin drops to low).
When calling Deserializer, we confirmed that Neck was returned from Deserializer, and confirmed that 0X0C of DS90UB927 was "01".
So I tried the test by connecting DS90UB928 EVM, but the lock is still broken. However, remote control of the 927 to 927 registers works normally.
And until the serializer calls the deserializer, it is confirmed that the lock is maintained well.
Could you advise me on why this is happening?
Is there a point I can check?
Below are all the settings that are changed from the default value in Serializer before calling Deserializer.
And 927,928 peripheral circuits are attached as follows.
Please ask for a review.
Please Check it
Thank you
Best Regards
From Anthony
