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Original question:

DS90UB954-Q1: DS90UB954 PASS pin output is abnormal

DS90UB954-Q1: DS90UB954 cannot read from address I2C

user5006961
Intellectual 805 points
Part Number: DS90UB954-Q1

Hi TI employees

Our customer use ds90ub954/953 design scheme. Currently, the data of 953 can be read, but the data of ISP of camera end cannot be read through 954, and the address is set as follows: WriteI2C(0x5d,0x60) # "SlaveID[0]".

They have used ds90ub913/914 before and can control the camera through the 914, but that plan does not add ISP.

May I ask, is 954 unable to read the camera data, or cannot read through the ISP

  • 0
    TI__Mastermind 30515 points

    Hello,

    Yes, you can't read ISP video data through I2C for both 953/954 link and 913a/914a link.

    You can read/write ISP's register value through I2C from remote I2C master control in 954's board, to enable this function, you shoud:

    step1: enable the I2C pass-through in 954 side;

    step2: set the remote slave IDX in slave ID and its Slave ID alias name.

    after above two settings, you can visit ISP's register with the slave ID alias name as ISP's I2C address.

    regards,

    Steven