Groups | Search | Server Info | Login | Register

Groups > comp.cad.synthesis > #21

Re: Calculate Delay from .Lib file

Show all headers | View raw

在 2006年8月28日星期一UTC-4下午7时46分18秒，Ali Arabi写道：
> Dear Friends
> How can we calculate  Delay of each cell, in Artisan .LIB file?
> we haven¡¦t any formula to calculate delay from lookup table timing
> of
> cell.
> 
> t typical=t intrinsic + (k load *C load)
> 
> In lib file for example in 4 different states we have like this lookup
> table , and in PDF file that explain cell we have this table
> 
> AND2(XL)
> 	      Intrinsic  Delay	    Kload(ns/pF)
> A->Y up	               0.0841	             6.274
> A->Y down  	0.1006	             3.4200
> B->Y up	               0.0923	             6.2745
> B->Y down	0.1126	             3.4246
> 
>   timing() {
>       related_pin : "A";
>       timing_sense : positive_unate;
>       cell_rise(delay_template_7x7) {
>         index_1 ("0.03, 0.1, 0.4, 0.9, 1.5, 2.2, 3");
>         index_2 ("0.000175, 0.0105, 0.01925, 0.042, 0.0735, 0.1155,
> 0.15575");
>         values ( \
>           "0.080607, 0.150106, 0.205288, 0.347674, 0.544107, 0.805701,
> 1.056285", \
>           "0.092210, 0.161200, 0.216270, 0.358643, 0.555134, 0.816778,
> 1.067389", \
>           "0.112858, 0.182922, 0.237694, 0.379680, 0.576040, 0.837712,
> 1.088363", \
>           "0.111214, 0.184757, 0.239252, 0.380505, 0.576823, 0.838233,
> 1.088781", \
>           "0.090919, 0.168979, 0.224332, 0.366194, 0.561995, 0.823386,
> 1.073944", \
>           "0.056146, 0.138642, 0.195301, 0.338845, 0.535911, 0.797161,
> 1.047540", \
>           "0.008458, 0.095244, 0.153515, 0.298830, 0.498188, 0.760983,
> 1.011433");
>       }
>       rise_transition(delay_template_7x7) {
>         index_1 ("0.03, 0.1, 0.4, 0.9, 1.5, 2.2, 3");
>         index_2 ("0.000175, 0.0105, 0.01925, 0.042, 0.0735, 0.1155,
> 0.15575");
>         values ( \
>           "0.042321, 0.151954, 0.250093, 0.507235, 0.863538, 1.338583,
> 1.793845", \
>           "0.042829, 0.152011, 0.250100, 0.507260, 0.863535, 1.338584,
> 1.793845", \
>           "0.048219, 0.154139, 0.251460, 0.507370, 0.863538, 1.338584,
> 1.793840", \
>           "0.057045, 0.159433, 0.253617, 0.508984, 0.864706, 1.338869,
> 1.793844", \
>           "0.065497, 0.168310, 0.260115, 0.512225, 0.865917, 1.340145,
> 1.794842", \
>           "0.074833, 0.178598, 0.268261, 0.520047, 0.870877, 1.341815,
> 1.795897", \
>           "0.084218, 0.189854, 0.277514, 0.529231, 0.881000, 1.348090,
> 1.798778");
>       }
>       cell_fall(delay_template_7x7) {
>         index_1 ("0.03, 0.1, 0.4, 0.9, 1.5, 2.2, 3");
>         index_2 ("0.000175, 0.0105, 0.01925, 0.042, 0.0735, 0.1155,
> 0.15575");
>         values ( \
>           "0.087344, 0.134763, 0.166237, 0.241997, 0.344630, 0.481154,
> 0.611946", \
>           "0.105535, 0.152875, 0.184365, 0.260149, 0.362789, 0.499316,
> 0.630109", \
>           "0.178071, 0.228516, 0.260849, 0.336985, 0.439534, 0.575983,
> 0.706742", \
>           "0.268932, 0.324313, 0.358480, 0.436243, 0.539164, 0.675576,
> 0.806192", \
>           "0.363057, 0.423664, 0.460117, 0.540220, 0.643491, 0.779892,
> 0.910664", \
>           "0.462961, 0.528881, 0.567910, 0.651651, 0.756655, 0.893396,
> 1.024021", \
>           "0.569940, 0.640736, 0.682483, 0.770481, 0.878383, 1.016849,
> 1.147930");
>       }
>       fall_transition(delay_template_7x7) {
>         index_1 ("0.03, 0.1, 0.4, 0.9, 1.5, 2.2, 3");
>         index_2 ("0.000175, 0.0105, 0.01925, 0.042, 0.0735, 0.1155,
> 0.15575");
>         values ( \
>           "0.033109, 0.088035, 0.131503, 0.250086, 0.420233, 0.649117,
> 0.868716", \
>           "0.033668, 0.088061, 0.131613, 0.250088, 0.420232, 0.649120,
> 0.868715", \
>           "0.041242, 0.093877, 0.135425, 0.251087, 0.420372, 0.649123,
> 0.868719", \
>           "0.051760, 0.104890, 0.144704, 0.256058, 0.422661, 0.649901,
> 0.868827", \
>           "0.063366, 0.117463, 0.156189, 0.262657, 0.425283, 0.651777,
> 0.870387", \
>           "0.074639, 0.131292, 0.170108, 0.273798, 0.431797, 0.654301,
> 0.871924", \
>           "0.086110, 0.145777, 0.185386, 0.288006, 0.443365, 0.661865,
> 0.876196");
>       }
>     }
> 
> I will be very appreciating if you can help me in this information.
> 
> Sincerely yours,
> Ali Arabi

Are you resolved this problem?

Back to comp.cad.synthesis | Previous | Next | Find similar

Thread

Re: Calculate Delay from .Lib file hnu.zjl@gmail.com - 2014-03-28 11:16 -0700

csiph-web