Missing direction on entity port

Discussion in 'VHDL' started by jtw, Sep 22, 2006.

  1. jtw

    jtw Guest

    As a result of changing what was a generic to an input port, I omitted the
    keyword 'in'. Neither the simulator (Modelsim 6.x) nor the synthesis tool
    (Synplicity 8.4) challenged me on this. Is there a specified default? Or
    is this a tool thing? (In case it isn't obvious, both the simulation and the
    synthesis turned out okay.)

    Jason
     
    jtw, Sep 22, 2006
    #1
    1. Advertising

  2. jtw wrote:

    > As a result of changing what was a generic to an input port, I
    > omitted the
    > keyword 'in'. Neither the simulator (Modelsim 6.x) nor the
    > synthesis tool
    > (Synplicity 8.4) challenged me on this. Is there a specified
    > default? Or is this a tool thing? (In case it isn't obvious, both
    > the simulation and the synthesis turned out okay.)


    The mode is optional with IN as default. The same goes for the formal
    parameters in the parameter list declaration of subprograms
    (procedures and functions). So it is perfectly OK that the simulator
    and synthesizer do not complain.

    --
    Paul.
     
    Paul Uiterlinden, Sep 22, 2006
    #2
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. minkowsky

    INOUT port on entity

    minkowsky, Feb 16, 2004, in forum: VHDL
    Replies:
    29
    Views:
    1,381
    Jos De Laender
    Feb 28, 2004
  2. Samuel van Laere

    Entity Name or Entity Number?

    Samuel van Laere, Feb 24, 2007, in forum: HTML
    Replies:
    4
    Views:
    1,716
    Jukka K. Korpela
    Feb 24, 2007
  3. markla
    Replies:
    1
    Views:
    573
    Steven Cheng
    Oct 6, 2008
  4. Norm
    Replies:
    3
    Views:
    2,839
  5. ThatsIT.net.au

    Entity, problem with entity key

    ThatsIT.net.au, Sep 6, 2009, in forum: ASP .Net
    Replies:
    1
    Views:
    1,228
    ThatsIT.net.au
    Sep 7, 2009
Loading...

Share This Page