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How to use TPS65982

user4623328
Prodigy 20 points
Other Parts Discussed in Thread: TPS65982

Dear sir,

I have a Notebook（DRP）, which already set as 5V,12V & 20V provider, and I also have a 65982 board ，

1)First，TPS65982 board as a UFP, could you please advise how to configure the 65982's register (UFP) for any voltage I wanted?

2)Second，Notebook as UFP,TPS65982 board as a DFP,how to configure the 65982's register (UFP) ?
3)I want to use STM32 to control TPS65982，Can I set the register by I2C?

4)Write register：modify the value of a few bit, do I need to re write all byte？For example，register（0x32） length is 31，but I want modify value of bit3~bit4，I need to  rewrite 31 bytes?

5）How to change the voltage, UFP, DFP  in the process of PD?

  • 0
    TI__Expert 6280 points
    Hello,

    For configuring the TPS65982 in different ways, I would check out our app note on how to replicate certain systems.

    www.ti.com/.../slva795

    For configuring the I2C registers read our firmware user's guide and host interface. You will have to write all the bytes of data to the register. We suggest doing a read, modifying the bits that you need to change, and writing the register with the updated data.

    Firmware User's Guide
    www.ti.com/.../slvuah7

    Host Interface
    www.ti.com/.../slvuan1

    Jacob
  • 0 in reply to Jacob Ontiveros
    Prodigy 20 points

    hello Jacob:

           TPS65982 Application Customization tool display register（0x33） length is 57. but Document（slvuah7 TPS65982 Firmware User Guide）display register（0x33） length is 29.I don't know which one is the standard？

    At the same time, I need to write all bytes to a register ?

    Can I only write a corresponding byte？not write 57 bytes。