I just ask about the Blackfin voltage ripple requirement . Such as core voltage(VDD_INT) and DDR voltage(VDD_DMC) .
VDD_INT and VDD_DMC can tolerate ripple as long as the voltage never crosses below the minimum spec or above the maximum spec. To help ensure this is the case, I recommend setting your voltage regulator to the nominal value and having plenty of bypass capacitors of varying sizes. For instance, the VDD_INT regulator should be set to 1.25V (nominal) on BF60x and should never cross below 1.19V or above 1.32V.
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