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TPS65910: I2C pull up to VMMC

na na78
Guru 16770 points

Part Number: TPS65910

Hi

The customer use TPS65910A31 for their board.

There is question where the I2C line should be pulled up to.

Our customer will connect SDA/SCL and SDASR/EN2 and SCLSR/EN1 to VMMC.

Do you have any problem in such connection configuration?

BestRegards

  • 0
    TI__Mastermind 30310 points
    The TPS65910Ax User's Guide for AM335x Processors (www.ti.com/.../swcu093f.pdf) shows that I2C lines are pulled up to VDDIO through a 1.2kOhm resistor, and that the "The TPS65910Ax digital control signal level is defined by the VDDIO connection".

    This means you can select what I/O voltage I2C lines are pulled up to. I recommend a 1.8V or 3.3V I/O voltage. Many of the LDOs could work, including VMMC, VDIG1, VDIG2, VAUX1, VAUX2, and VAUX33.