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RyusukeYOKOYA's avatar
RyusukeYOKOYA
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7 months ago

Re: Inquiry Regarding Cyclone V IBIS Model Definitions and Updates

Dear Intel Support Team, I hope this message finds you well. I am currently conducting IBIS simulations for the Cyclone V FPGA, specifically for the part number 5CGXFC9C6F23, and I have a few quest...
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RyusukeYOKOYA's avatar
RyusukeYOKOYA
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6 months ago

Dear Aqid and FvM,

Thank you for your responses and clarifications.

I would like to correct my initial message. The example I meant to refer to was not:

  • lvcmos_rtpio_d2s1 and lvcmos_rtpio_d16s1

but rather:

  • lvcmos_rtpio_d2s1 and lvttl_rtpio_d16s1
  • lvcmos_rtpio_d2s1_p and lvttl_rtpio_d16s1_p

Upon inspecting the IBIS file (cyclone5.ibs), I noticed that these pairs of models appear to have identical IBIS definitions, despite differing in name and intended I/O standard and drive strength. This raises concerns about whether the models are correctly differentiated and whether they can be reliably used for signal integrity simulations.

Could you please confirm whether this duplication is intentional, and if not, whether updated or corrected IBIS models are available?

Thank you again for your support.

Best regards,
Ryusuke YOKOYA