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why disable drift guard property for dpll in BSP version A8 01 01

Huai Hellen
Expert 1030 points

 Hi, all

I compare the source code between bsp A8010100 and A8010000, find that in bsp A8010100, disabled the drift guard property (    dpllInfo.driftGuardEnabled = FALSE). Could someone tell me the reason? Thank you!~

  • 0
    TI__Expert 5320 points

    Hellen

    The driftguard is needed only when you have an end product that is exposed to large varying temperature and/or voltage. When this flag is enabled, DPLL can do auto-recalibration whenever it detects drifts in temp/volt. While this re-calibration is in progress, if care is not taken to stall the accesses to the modules affected by this re-calibrating DPLL, it could lead to system instability. So unless you are designing a product that will be used in such extreme conditions, it is recommended to disable driftguard flag for the DPLLs.

    -Madhvi