1. si.inp generation
2.
MoveSiInp.pl
a. TransientHspice.pl
b. CapaFinder.pl
3.
Transient Analysis
4.
Entra-point Consideration
5.
HspiceAUTO.pl
a. Spectre2Hspice.pl
b. fallrisetable.pl
6.
librarylist.pl
7.
librarymaker.pl
8.
LibraryCompiler
MoveSiInp.pl will also call CapaFinder.pl to find the input pin capacitance for each cell. It transforms si.inp into a capacitance measurement Hspice file. The file name will be (cell name)cap.sp, In this tutorial the name is nand2x1cap.sp. It looks like this:
MoveSiInp.pl then runs the Hspice simulation. After the simulation, the measurement result will be contained in nand2x1cap.mt0 and nand2x1cap.mt1, one file for each input pin of the nand2x1 gate. One of the files looks like this:
The second value 8.577e-26 is input pin capacitance.
But we don't have to go to each directory to record these values, because MoveSiInp.sp records all capacitance values into a single file. This file is located under spicetest folder and called CellCapacitance.list. Here is the sample list file:
In our tutorial, we will have only the nand2x1 information.