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RPDM's avatar
RPDM
Icon for Occasional Contributor rankOccasional Contributor
7 years ago
Solved

Can I use 50 Ohm calibrated bidirectional pins on an Arria 10 - seems not?

So I've replicated this on two different Arria 10 devices (10AX027 & 10AS066) and if I create a bidirectional pin I cannot get it to output something if set to a 50 Ohm calibrated output. So: set to...
  • YuanLi_S_Intel's avatar
    YuanLi_S_Intel
    7 years ago

    Hi RPDM,

    It is hardware restriction that bidirectional cannot have OCT for GPIO. However, when the I/O pin is used with external memory interface IP, bidirectional with OCT is allowed.

    Regards,

    YL

YuanLi_S_Intel's avatar
YuanLi_S_Intel
Icon for Regular Contributor rankRegular Contributor
7 years ago

​Hi Richard,

May I know which quartus version you are using? I have checked with internal team, OCT cannot be enabled for bidirectional pin.

Regards,

YL

RPDM's avatar
RPDM
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Hi Yuan,

My last test was using 18.1. I've not tried since.

This is obviously an issue for us. Will it be fixed in a newer version of Quartus, or is it a hardware issue?

I am assuming that it does not affect Intel's External Memory Interface IP, since that obviously needs calibrated bi-directional pins?

Regards,

Richard