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Steve9's avatar
Steve9
Icon for Occasional Contributor rankOccasional Contributor
6 months ago
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Agilex 7 F Series Transceiver Pins Allowed Voltages During Powerup/When Unpowered

Hello,  I would like to confirm the voltages allowed on the Agilex 7 F series Transceiver I/O (the Transceiver Data lanes and the REF_CLK inputs) during power-up or when the Agilex and its transceiv...
Generic Io
Power
Programmable Logic Device
  • Ash_R_Altera's avatar
    Ash_R_Altera
    6 months ago

    Hi,

    Yes, there is no footnote about the refclk but they can be driven when unpowered as long as there is proper coupling and the voltages are in the specified limits.

     

    Regards

Steve9's avatar
Steve9
Icon for Occasional Contributor rankOccasional Contributor
6 months ago

Thank you for the link. Below image is what I see regarding hot plug. It states that the device supports addition/removal from system during run-time. 

I am not sure if this means Hot Plug is supported functionally but assumes the hardware design prevents I/O from being toggled while device is now powered by for example gating the I/O by having an enable for the REF_CLK buffer that is tied to the Agilex power supplies "Power Sequence Done" signal or similar. 

Can you please confirm Agilex7 F tile transceivers will not be damaged when Agilex 7 F tile hot plugged into system with like PCIe REF_CLK and PCIE data lines such that they are driven before the Agilex7 F tile is powered.