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TUSB212: Asking for TUSB212 register default setting in I2C mode

SHH
Mastermind 32266 points
Part Number: TUSB212


H Team,

What is the TUSB212 register EQ and boost setting if TUSB212 in I2C mode? there is no MCU on the I2C bus.

BR,

SHH

  • 0
    TI__Guru 64326 points

    Hi SHH,

    These starting values are determined by the pin strap settings of EQ and DC_Boost pins at reset.

  • 0 in reply to Malik Barton57
    TI__Mastermind 32266 points

    Hi Malik,

    Thanks for feedback.

    Customer original design pull high the I2C bus without connecting to MCU. customer think the EQ and boost gain should be decide by EQ and DC_Boost pins at reset. however, customer found they change the EQ and Boost setting are in vain.

    Until removing the pull high resistor, cusotmer can use the EQ and Boost pins HW setting to design EQ and boost.

    Would you please provide comment on this behavior or possible senario?

    BR,

    SHH

  • 0 in reply to SHH
    TI__Guru 64326 points

    HI SHH,

    TUSB212 detects the SDA and SCL pull-ups to enter I2C mode. Removing the I2C master will not prevent TUSB212 from entering I2C mode so EQ and DC_Boost setting will not change dynamically. If no I2C master is present then pull ups should be removed. In general, customer should stick to either GPIO mode (no I2C pull-ups) or I2C mode (I2C pull-ups with I2C master).