• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 3 answers
  • Subscribers 32 subscribers
  • Views 200 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

DS90UB962-Q1: I2C master Proxy

DS90UB962-Q1: 962 compatible with 933 and 935

Elec Cheng
Expert 7055 points
Part Number: DS90UB962-Q1

Hi Expert,

Our customer want to re-use platform design. Currently they use 962 + 935 in MP. Now they would like to use 962 + 933 for a new project. But they cannot change 962 hardware design and software design dur to time limit. They can only change 935 to 933. 962 is strapped as CSI mode. Under this condition, is it possible for 962 lock to 933? From my understanding, it cannot, but here just double confirm with you. If they cannot lock, how about the I2C? Does I2C work if unlock? From your side, is there any possible way to make it work? Thanks.

BR,

Elec Cheng

  • 0
    TI__Guru* 87750 points

    Hello Elec,

    If they want to use the 933 instead of 935, and pair it with the 962 then they must either change Hardware or Software on the 962 side. There is no workaround.

    If you do not have LOCK then there will be no remote I2C communication. 

  • 0 in reply to Hamzeh Jaradat
    TI__Expert 7055 points

    Hi Hamzeh,

    Here is the thing. 962 hardware is intended for 935 and cannot be changed. So initially 962 is strapped as CSI-2 Mode (reg 0x6D[1:0] = 00). Then they want to use current 962 to pair with 933. If 962 and 933 can lock, the customer want to use SoC (locate on 933 side) to configurate 962 again to right register configuration. So I want to confirm with you that:

    1. if 962  strapped as CSI-2 Mode can lock with 933? 
    2. If they can lock, then can 933 configurate 962?

    Thanks.

    BR,

    Elec Cheng

  • 0 in reply to Elec Cheng
    TI__Expert 7055 points

    Hi Hamzeh,

    Update the diagram for better understanding.

    And our customer test and they find 962 can lock. So need to double confirm with you.

    BR,

    Elec Cheng

  • 0 in reply to Elec Cheng
    TI__Guru* 87750 points

    Hello Elec,

    If you are getting LOCK that means you should be able to communicate via I2C. The first thing you should do on the UB962 side is to change the configs in reg 0x6D and then reg 0x58.

  • 0 in reply to Hamzeh Jaradat
    TI__Expert 7055 points

    Hi Hamzeh,

    We need you to confirm if this usage is applicable, because we don't find related description in d/s. May you help give some explanation for that? Thanks.

    BR,

    Elec Cheng

  • 0 in reply to Elec Cheng
    TI__Guru* 87750 points

    Hi Elec,

    As I said in my first reply, this use case is not recommended. i.e., changing the Mode of a device remotely. Normally the recommended method is to change the hardware settings, or to change the software settings locally, but not remotely.

    If the customer choses to do that remotely, they have to test this method and validate it thoroughly. TI does not give guarantee that this will work always error free.