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amitjagtap
Joined: 10 Jan 2007
Posts: 89
Helped: 3
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 05 Sep 2007 10:01 how to cal fmax here |
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hi all,
In the fig below how to cal fmax.
what will be the skew here.
Is there any use of Tdata_q.if yes what it is?
thanking you,
Amit
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A.Anand Srinivasan
Joined: 15 Oct 2005
Posts: 1773
Helped: 213
Location: India
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| 05 Sep 2007 16:50 Re: how to cal fmax here |
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| Tclk≥Tskew+Tdata_q+Tsetup.... Tdata_q is the time required for the q to come out after the input has been given....
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amitjagtap
Joined: 10 Jan 2007
Posts: 89
Helped: 3
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| 06 Sep 2007 21:58 Re: how to cal fmax here |
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hellow sir,
If i'm not wrong the formula for Tclk is
Tclk≥Tskew+Tpd+Tsetup. ---- Tpd is propagation delay of combi logic
I have never seen Tdata term included in cal of Tclk.
again there is skew present in clk. then it should be considered for Tclk cal.
Thinking you,
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A.Anand Srinivasan
Joined: 15 Oct 2005
Posts: 1773
Helped: 213
Location: India
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| 06 Sep 2007 22:20 Re: how to cal fmax here |
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here there is no combinational logic but a D flip flop and the propagation delay of data to the Q has been given by Tdata_q so only i have used Tdata_q instead of Tpd,,,,
the skew of the clock is accounted for using Tskew,,,,
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