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 Regarding skew from clock Report 

Last post Wed, Feb 27 2013 6:57 AM by Kari. 1 replies.
Started by Ganga111AtFPS 28 Sep 2012 03:21 AM. Topic has 1 replies and 1046 views
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  • Fri, Sep 28 2012 3:21 AM

    • Ganga111AtFPS
    • Top 500 Contributor
    • Joined on Fri, Jun 29 2012
    • Hyderabad, Andhra Pradesh
    • Posts 21
    • Points 545
    Regarding skew from clock Report Reply

    Hi all,,,

     Nr. of Subtrees                : 118
    Nr. of Sinks                   : 18810
    Nr. of Buffer                  : 3231
    Nr. of Level (including gates) : 23
    Root Rise Input Tran           : 100(ps)
    Root Fall Input Tran           : 100(ps)
    Max trig. edge delay at sink(R): tri_des_B/des3/u2/L10_reg_14_/CK 2192.4(ps)
    Min trig. edge delay at sink(R): ahbSlaveIF/readData_sel_reg/CK 2025.9(ps)

                                     (Actual)               (Required)
    Rise Phase Delay               : 2025.9~2192.4(ps)      0~1000(ps)
    Fall Phase Delay               : 2076.3~2257.4(ps)      0~1000(ps)
    Trig. Edge Skew                : 166.5(ps)              100(ps)
    Rise Skew                      : 166.5(ps)
    Fall Skew                      : 181.1(ps)
    Max. Rise Buffer Tran          : 304.4(ps)              300(ps)
    Max. Fall Buffer Tran          : 317.4(ps)              300(ps)
    Max. Rise Sink Tran            : 388.4(ps)              100(ps)
    Max. Fall Sink Tran            : 405.2(ps)              100(ps)
    Min. Rise Buffer Tran          : 25.9(ps)               0(ps)
    Min. Fall Buffer Tran          : 25.1(ps)               0(ps)
    Min. Rise Sink Tran            : 15.3(ps)               0(ps)               
    Min. Fall Sink Tran            : 14.4(ps)               0(ps)
        
    view cipher_func_mode_rcworst_corner_view : skew = 166.5ps (required = 100ps)
    view cipher_func_mode_rcbest_corner_view : skew = 76.4ps (required = 100ps)

    Can any explain the skew of my design from report?

    • Post Points: 20
  • Wed, Feb 27 2013 6:57 AM

    • Kari
    • Top 10 Contributor
    • Joined on Tue, Jul 15 2008
    • Cary, NC
    • Posts 684
    • Points 13,605
    Re: Regarding skew from clock Report Reply
    Look at the "Trig. Edge Skew" line. Your skew is 166.5ps.
    • Post Points: 5
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Started by Ganga111AtFPS at 28 Sep 2012 03:21 AM. Topic has 1 replies.