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RyusukeYOKOYA's avatar
RyusukeYOKOYA
Icon for New Contributor rankNew Contributor
8 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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FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
8 months ago

Hi,
thanks for correction. Now I get your point.

lvcmos_xxx_d2xx Ibis I/V curves don't look like 2 mA current strength, according to datasheet specification (0.2 V max. voltage drop at nominal current) it rather looks like 8 mA. Unfortunately I have no Cyclone V board at hand and can't check if lvcmos_d2 I/O standard is setting current strength that high or if it's only an IBIS file error.

I can tell that e.g. Cyclone 10LP has consistent current strength settings and IBIS files.

In contrast, the relation of Cyclone V lvcmos30 and lvttl30 I/V curves looks consistent. See below a visualization.

Best regards
Frank