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AM5706: Vdd level in PET

Francois Charlot
Mastermind 28057 points
Part Number: AM5706

Hello,

Referring to the following documents:

  • AM5706D PET (sprm721 / AM5706D_Power_Spreadsheet_v1p4p0.xlsm)
  • AM571x PET (sprac99 / AM571x_Power_Spreadsheet_v1p3p1.xlsm)

The PET seems to imply the AM5706D has a single Vdd rail for CORE and MPU, and the tool sets it to 1.05 V. The AM571x has separate rails for core and MPU, and the tool sets both to 0.92 V. This translate to the AM5706D having a higher power consumption than the AM571x. Is this correct? If so, is there a workaround?

By the way, the AM571x PET application report (link) incorrectly points to the AM572x Excel PET. The AM571x application report text and URL should be pointing to .../lit/zip/sprac99.


Regards,
François.

  • 0
    TI__Guru**** 393215 points
    The PMT experts have been notified. They will respond here.
  • 0
    TI__Genius 13567 points

    Hello François,

    Please expect that there are no power differences between AM571x and AM570x. The PET "typ" voltage estimate for AM571x and AM572x is too low... in production no chip is programmed lower than 0.97V. This is why the AM570x spreadsheet is higher because AM57xx family is typically 0.99 to 1.06 at OPP_NOM and you can refer to bits [11:0] of 0x4A00 25F4 to tell you what actual voltage to program the CORE rail. This value is different from chip to chip. It's expected that the PET for AM571x and AM572x will be updated with the same fixes. 

    FYI the register is from "AVS Class 0 Associated Registers" from the Technical Reference Manual. Which OS do you plan to use anyway?

    Regards,
    Ahmad