Re: errata/225: PROPOSAL - The fourth port direction

From: Dennis Marsa (drm@xilinx.com)
Date: Mon Aug 11 2003 - 11:00:01 PDT

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    The following reply was made to PR errata/225; it has been noted by GNATS.

    From: Dennis Marsa <drm@xilinx.com>
    To: Shalom Bresticker <Shalom.Bresticker@motorola.com>
    Cc: etf-bugs@boyd.com
    Subject: Re: errata/225: PROPOSAL - The fourth port direction
    Date: Mon, 11 Aug 2003 11:26:47 -0600

     Shalom Bresticker wrote:
    > Precedence: bulk
    >
    > The following reply was made to PR errata/225; it has been noted by GNATS.
    >
    > From: Shalom Bresticker <Shalom.Bresticker@motorola.com>
    > To: ptf@boyd.com, etf-bugs@boyd.com
    > Cc:
    > Subject: Re: errata/225: PROPOSAL - The fourth port direction
    > Date: Mon, 11 Aug 2003 12:14:50 +0300
    >
    > Question:
    >
    > In Annex G (vpi_user.h), on p. 818 of 1364-2001b, the following appears:
    >
    > #define vpiDirection 20 /* direction of port: */
    > #define vpiInput 1 /* input */
    > #define vpiOutput 2 /* output */
    > #define vpiInout 3 /* inout */
    > #define vpiMixedIO 4 /* mixed input-output */
    > #define vpiNoDirection 5 /* no direction */
    >
    > What does "no direction" mean?
    >
    > Thanks,
    > Shalom
     
     
     My guess is that vpiNoDirection is for ports with no internal connections.
     
     For example:
     
          module M(/*null*/, .A(/*null*/));
          endmodule
     
     Dennis
     

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