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[FAQ] DS90UB954-Q1: PDB Hard Reset Required?

Part Number: DS90UB954-Q1

In the 954 datasheet the Power Up Sequencing figures 55 and 56 show a hard reset after the first PDB. Is this a requirement, recommendation, or only there to show if you do a hard reset after power up the required timing(t7 and T8)?

If VDD18, VDDIO, and REFCLK are all stable before PDB goes high, is the hard reset still required/recommended?



  • Hello Justin,

    The hard reset is not required like what is in the diagram. The reason it is in the picture is to show the minimum low-pulse width required if you intend to do a reset with PDB at any point during operation. 

    Best Regards,