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Eratta: Power Domains Hang When Powered Up

paddu1
Expert 1195 points
Other Parts Discussed in Thread: TMS320C6654

Hi,

The TMS320C6654 has an eratta(SPRZ381- Advisory 11) saying "Power Domains Hang When Powered Up
Simultaneously with RESET",
and the eratta details mentions that "when the software is powering up"... is it something
related to soft reset?

We are confused how exaclty the Workaround should be done in the application...
is it required to apply all the RESET,RESETFULL,POR during power up?

Best Regards.
Paddu.

  • 0
    Guru 31670 points

    Paddu,

    Check the datasheet of the device. These pins are clearly described.

    http://www.ti.com/lit/ds/symlink/tms320c6654.pdf

    RESETFULL -> Full Reset
    RESET -> Warm Reset of non isolated portion on the IC
    POR  -> Power-on Reset
    RESETSTAT  -> UP Reset Status Output

  • 0
    TI__Mastermind 30825 points

    Paddu,

    It's not related to Softrest, it's related to pin driven Hard Reset.  When the device comes up from a PORz the bootROM will execute and part of what it does is change the state of various power domains. If a RESET comes in during this period it interrupts this process the issue occurs.  You need to follow the workaround to ensure this does not occur.

    Best Regards,
    Chad