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Unused Pins and Power Domains for AM389x

DaveB123
Expert 4745 points

I envision planning for use cases that may not require all the features, peripherals(e.g USB/PCIE) or both DDR2 interfaces.

I'm interested in understanding how minimalisticly simple the AM389x power management design can be.

I beleive TI published a recommendation (via a Wiki) that included best practices for minimizing power by shutting off or not even connecting power to some power domains as well as treating unused pins for OMAP3xxx.

Does such a document or wiki exist for AM389x?

What can I do with unused power domains and unused pins to minimize power?

 

  • 0
    TI__Expert 4745 points

    To clarify (and maybe answer) my question:  According to the datasheet

    "Each voltage domain is powered by dedicated supply voltage rails. For the mapping between voltage domains and the supply pins associated with each, see

     

    Table 3-30. 

    Note:

     

    A regulated supply voltage must be supplied to each voltage domain at all times, regardless of the power domain states."

    I take from this that there is very little opportunity to simplify the power managment design for this device...

     

    .

  • 0
    TI__Mastermind 25055 points

    Hello,

    It is possible to shut off unwanted power domains, and also to power down some unused portions of the device, such as PCIe and SATA SERDES.  please refer to the datasheet Terminal Functions tables for details.

    Regards,
    Marc