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Altera_Forum
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13 years ago

Power Sequencing for Arria II GX devices

Hi,

We are using Arria II GX devices on our boards. Just wanted to know whether anyone has implemented any power sequencing for this device?

The datasheet specifies that power sequencing is not required for these devices.

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  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    While there may not be a power-sequence requirement in the sense of particular supplies coming on before others. The Altera handbooks (and implementation guides) usually have a statement to the effect that all power rails must come up monotonically and be stable within the power-on-reset time of the device.

    Since you mention you are using a GX device, I assume you are using the transceivers. If you are using this device in a PCIe design, then you have a power-on requirement for the PCIe end-point to be alive within about 100ms of power-on. This means that you need to factor in the time for your power supplies to power up.

    Here's an example for you to read through

    http://www.ovro.caltech.edu/~dwh/wbsddc/ts4_power.pdf

    Cheers,

    Dave