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generating SDF

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Hai , Please clarify me the following : To genrate sdf, can we ganerate it for more than one corner(max,min,typical) at a time.If so,kindly tell me how to do it. Thanks & Regards, K.VISWANADH BABU


Originally posted in cdnusers.org by viswanadhbabu
Parents

  • The tool has been enhanced in this area around the 6.1 timeframe. In the olden days, delay calculation -and- sdf writing were done together as part of the delayCal command. This method of operation became outmoded as the tool was enhanced to support Mulit-Mode Multi-Corner (MMMC). The "write_sdf" command can be used to write delay values stored in memory. I think the best way to do what you're looking for is with MMMC and the write_sdf command. Something like this:


    timeDesign
    write_sdf -min_view -typ_view -max_view

    encounter 1> help write_sdf
    Usage: write_sdf [-version { 2.1 | 3.0 }] [-precision
    ] [-scale ]
    [-delimiter ] [-transform_out_to_out_arcs]
    [-celltiming {all | none | nochecks}]
    [-interconn {all | none | noport |
    noinport | nooutport}] [-edges {edged
    | library | noedge | check_edge}] [-remashold]
    [-splitrecrem] [-splitsetuphold] [-condelse]
    [-nonegchecks] [-min_period_edges {posedge
    | negedge | both | none}] [-no_escape]
    [-merge_arcs] [-process] [-voltage]
    [-temperature] [-filter] [-view ]
    [-min_view ] [-typ_view ]
    [-max_view ]

    Hope this helps,
    Bob


    Originally posted in cdnusers.org by BobD
Reply

  • The tool has been enhanced in this area around the 6.1 timeframe. In the olden days, delay calculation -and- sdf writing were done together as part of the delayCal command. This method of operation became outmoded as the tool was enhanced to support Mulit-Mode Multi-Corner (MMMC). The "write_sdf" command can be used to write delay values stored in memory. I think the best way to do what you're looking for is with MMMC and the write_sdf command. Something like this:


    timeDesign
    write_sdf -min_view -typ_view -max_view

    encounter 1> help write_sdf
    Usage: write_sdf [-version { 2.1 | 3.0 }] [-precision
    ] [-scale ]
    [-delimiter ] [-transform_out_to_out_arcs]
    [-celltiming {all | none | nochecks}]
    [-interconn {all | none | noport |
    noinport | nooutport}] [-edges {edged
    | library | noedge | check_edge}] [-remashold]
    [-splitrecrem] [-splitsetuphold] [-condelse]
    [-nonegchecks] [-min_period_edges {posedge
    | negedge | both | none}] [-no_escape]
    [-merge_arcs] [-process] [-voltage]
    [-temperature] [-filter] [-view ]
    [-min_view ] [-typ_view ]
    [-max_view ]

    Hope this helps,
    Bob


    Originally posted in cdnusers.org by BobD
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