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FPGAOLOG's avatar
FPGAOLOG
Icon for Occasional Contributor rankOccasional Contributor
4 years ago
Solved

Is waitrequestAllowance suported for Altera EMIF external mem interface?

The Avalon document mentions waitrequestAllowance parameter but I cant see a way to set it in either Avalon mm bridge or EMIF Avalon interfaces. How can I set it to 1 for EMIF Avalon interface?
  • FPGAOLOG's avatar
    FPGAOLOG
    4 years ago

    " waitrequest will usually only be ...". There is no usually in RTL. There is always. So waitrequest may be asserted DURING the burst. This means everything connected to waitrequest must be combinatorial, and can't be pipelined.

    Thanks for the help. You may close this ticket.

AdzimZM_Altera's avatar
AdzimZM_Altera
Icon for Regular Contributor rankRegular Contributor
4 years ago

Hello,


May I know if your question has been answered?


Regards,

Adzim


FPGAOLOG's avatar
FPGAOLOG
Icon for Occasional Contributor rankOccasional Contributor
4 years ago

No it is not.

I said " avoid combinatorial waitrequest", not "avoid waitrequest".

But I did dig in to the code and found out waitrequestAllowance is not supported by Intel EMIF interface claiming it has Avalon interface but not complying on this setting.

Please read the definition of waitrequestAllowance and why it is needed for before answering .