DS90UB947-Q1: Pairing issue with DS90UB928-Q1

Hi Tess,

There is a 947 Errata. Did you implement each and every item in the Errata?

Aaron

Hi Aaron:

    Would you mind to elaborate which item of the Errata details for the issue?

Hi Aaron:

I read the 0x0c register of the 947 is sometimes 0x14 or 0x04,but it can be displayed normally. what might be the reason for that?

Hi Jinxu,

It is very strange that the bit0 of 0x0C register is not set. If you are getting the link between serializer and deserializer, you should be able to get this bit0 set.

Aaron

Hi GaoFeng,

I would suggest that you reach out to Tess if you need to get 947 Errata. Unfortunately, I can't share in this forum.

Aaron

I've got 947 Errata of version 1.9 (12/17/2019) in hand, but I'm not sure which one according to the current issue.

Is there a later version?

Hi Aaron:

TI suggested the pdb of 928 is ,why the pdb need drivered low 2 times?  when we drivered the pdb of 928 low one time, the reg 0x0c of the 947 is 0x17, it is ok.

Hi Aaron:

what might be the reason for that?can you have any suggestion?

Hi GaoFeng,

You must implement all the requirements in the Errata.

Aaron

Hi Jinxu,

I am not sure if I see this diagram before. Can you point me where you got the diagram? The PDB pin is user control where they can power down the device by pulling the PDB low. The only power sequence requirement for 928 is on section 10.

Aaron