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TUSB8042A: Dynamic Enable/Disable

Jim Tsai
Expert 4470 points
Part Number: TUSB8042A

Hi ,

Would like to confirm with you the feature to enable/disable DSP is dynamic or not? Or the USB hub should be reset after override the register by I2C?

 

  • 0
    TI__Guru**** 155021 points

    Hi,

    The TUSB8042A supports a serial interface for configuration register access. The device may be configured by an attached I2C EEPROM or accessed as a slave by an external SMBus master.

    For I2C, the TUSB8042A supports a single-master, standard mode (100 KHz) or fast mode (400KHz) connection to a dedicated I2C EEPROM when the I 2C interface mode is enabled. In I2C mode, the TUSB8042A reads the contents of the EEPROM at bus address 1010000b using 7-bit addressing starting at address 0. The TUSB8042A reads the entire EEPROM contents using a single burst read transaction. The burst read transaction ends when the address reaches FFh.

    When changing the port configuration, USB hub must do a power on reset in order to read the updated EEPROM contents.

    Thanks

    David