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DS90UB935-Q1: power up sequence

Jiawei Hu1
Expert 5565 points
Part Number: DS90UB935-Q1

Hi team,

For UB935 power up sequence, could you kindly check why we need PDB hard reset? As you know, in camera module, PDB typically use RC to make delay, we can't make PDB hard reset.

BR

Jiawei

  • 0
    TI__Mastermind 26540 points

    Hello Jiawei,

    Thank you for your question. A hard reset is not required for the power up sequence. The reason the hard reset is included in this image is to demonstrate the amount of time that PDB must be high before a reset can occur (T2) as well as the amount of time the PDB signal must be held low for a hard reset to occur (T3). A hard reset via PDB is not necessary for the device, but if one is desired then those timings should be followed.

    Regards,
    Darrah