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Thread: rise time requirement for PORST

  1. #1
    New Member New Member sheitbrink is on a distinguished road
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    rise time requirement for PORST

    Hi all,
    I suppose I am trying to figure out what the PORST rise time requirement, on pg 78 (table 38), means for my upcoming design. I see in the relax kit this pin is simply pulled up to +3.3V. Would this mean that my power supply would have to rise at a certain rate? Or do I need to put a power supervisor IC to make sure the system remains in reset until the power is fully stable? Generally I voltage regulators I use have a couple of millisecond rise times.

    Thanks
    sheitbrink

  2. #2

    Infineon Employee
    Infineon Employee
    jferreira will become famous soon enough
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    Hi,

    I would just copy the values from our reference designs.
    Click image for larger version

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    Further guidelines can be found in http://www.infineon.com/dgdl/APP_XMC...427b9be8b11f13

    Regards,
    Jesus
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

  3. #3
    Advanced Advanced aurixuser is on a distinguished road
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    Several milliseconds to stabilize? Which regulator are you using?

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