XSPACE USER`S MANUAL - Circuits and Systems
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1. For example red and green becomes yellow An example to specify the colors of masks np nd nm ni nb nx ng nc and sub is as follows colors np red nd green nm blue ni CCC nb magenta nx cyan ng black ne black sub pink The Nelsis IC Design System Xspace User s Manual 5 Usage of Xdefaults The Xdefaults file in the users home directory is used to set X window related preferences unless a resource database was build using the command xrdb Since Xspace uses the X toolkit and the resource manager a very large number of parameters can be changed by the user The following is a list of some of the more useful resources with their default values Xspace background Xspace borderColor Xspace font Xspace Command background Xspace Command foreground Xspace Label background Xspace Label foreground Xspace SaveUnder Xspace Scrollbar background Xspace Scrollbar foreground Xspace canvas Xspace canvas Xspace canvas Xspace canvas Xspace canvas background borderColor borderWidth height width Xspace menu borderColor Xspace menu hSpace Xspace menu vSpace Xspace messageWindow LightSteelBlue black screen b 16 yellow black yellow black False yellow black black LightSteelBlue 5 375 500 LightSteelBlue 2 10 False The Nelsis IC Design System2. The title is used by some window managers that provide frames with title bars around windows This can be used to overrule any X resource setting from the command line The Nelsis IC Design System Xspace User s Manual 3 2 Menu entries Unless the option X is used Xspace has the following menus 2 1 extract menu extract Start the extraction process display clear Clear the display quit Stop the program and exit pause Temporarily pause the program sync Toggle X window system synchronous mode for easier debugging and sometimes better pictures run free Don t look for events any more gives fastest drawing but can not be interrupted The extraction must run until the cell is completely finished robot Start stop a free hand demo by executing the commands that are described in the file program reset robot Reset the automatic demo program 2 2 database menu A list of cells in the database Radio buttons 2 3 options menu resistance Toggle non metal interconnect resistance extraction Equivalent to the r option of space metal resistance Toggle non metal and metal interconnect resistance extraction Equivalent to the R option of space mesh refinement Apply a mesh refinement for resistance extraction This gives more accurate resistance values capacitance Toggle ground capacitance extraction Equivalent to the c option of space coupling cap Toggle coupling capacitance extraction Eq
3. When the following parameter is on drawing results of extraction prepasses are not cleared This makes it possible to e g keep the boundary element mesh of substrate resistance extraction in the final picture that is displayed The Nelsis IC Design System Xspace User s Manual disp save_prepass_image boolean default off The Nelsis IC Design System Xspace User s Manual 8 4 Mask colors The colors that are used to display the different masks conductors are specified in the space element definition file after the optional specification of the new masks Syntax colors mask color A specification consists of a mask name followed by a color The mask name may be an original mask name a mask name created using the new statement or the string sub For masks that are created in the element definition file using the new statement and for the sub mask only boundary elements of conductors of that mask will be drawn in that color i e DrawTile will not draw the color of that mask Available color names are all X color names these are normally found in the file usr lib X11 rgb txt including the special color glass which means in fact invisible Moreover RGB values can be specified in the X fashion with the character replaced by the character since the former is already used to specify comment in the element definition file Black is drawn dominant all other colors are mixed
4. XSPACE USER S MANUAL A J van Genderen N P van der Meijs Department of Electrical Engineering Delft University of Technology The Netherlands Report ET NS 96 02 Copyright 1996 2001 by the authors All rights reserved Last revision June 2001 Xspace User s Manual 1 1 Introduction Xspace is a graphical version of space running under the X window system This version is used to show the resistance mesh and the boundary element mesh that are generated by the program and to show how the program works from an algorithmic point of view Xspace can be invoked as follows Xspace space space3d options X X toolkit options cell All options of space or space3d see the Space User s Manual may be used with Xspace When an option of Xspace is set on the command line that corresponds to an option that can be set in the menu of Xspace this option will be enabled in the menu Also when a cell is given as an argument that cell will be enabled in the database menu The option X is used to omit the menu bar of Xspace In that case a cell name must be given as argument and all extraction options have to be set on the command line and or in the parameter file In contrast to when the option X is not used the program will immediately start the extraction Further the following standard X window toolkit options are recognized by Xspace bg color or background color Set the background color to color Avail
5. able color names are normally found in the file usr lib X1 1 rgb txt bd color or bordercolor color Set the window border color to color bw width or borderwidth width Set the window border width to width display host display screen Specifies the X server the program should connect to e g victor 0 this is the display that the program will use for graphical output and input If omitted the value of the environment variable DISPLAY is used If this environment variable is not set properly either an error will be reported by the X window system fg color or foreground color Set the foreground color to color fn font or font font The specified font will be used instead of the default font which is variable or as specified in Xdefaults The Nelsis IC Design System Xspace User s Manual geometry WxH X Y name name rv or reverse Irv title title xrm lt any X resource gt Set the window size to W by H and place the window at location X Y Set the application name to name which is used to retrieve the default setting from the X resource database or the Xdefaults file This facilitates easy switching from one set of X window related preferences to another Set reverse video mode The results are undefined for color screens Unset reverse video mode can be used to overrule a reverse video statement in the user preferences Set the title to title
6. ing corresponding commandline options e g the menu entry coupling cap can also be set by setting the commandline option C entries from the menu can also be set by setting corresponding parameters in the parameter file Setting the following parameters corresponds to setting the following menu entries disp sync sync disp be_mesh_only BE mesh only disp pair_boundary PairBoundary disp draw_tile DrawTile disp draw_edge DrawEdge disp draw_resistor DrawResistor disp undraw_resistor UndrawResistor disp draw_out_resistor DrawOutResistor disp draw_fe_mesh DrawFEMesh disp draw_equi_lines DrawEquiLines disp draw_be_mesh DrawBEMesh disp draw_green DrawGreen disp 3_dimensional 3 dimensional disp draw_sub_term DrawSubTerm disp draw_delaunay DrawDelaunay disp draw_sub_resistor DrawSubResistor The following two integer parameters may be used to set the width and height of the display window width height disp width disp height With the following parameter the window of the layout that is displayed is specified default the whole layout is displayed The parameter requires as arguments the x left x right y bottom and y top coordinates of the window The coordinates are specified in lambda disp layout_window xl xr yb yt When the following parameter is on substrate terminals are drawn with their tile mask color When it is off only the border of the substrate terminals is drawn disp fill_sub_term boolean default on
7. uivalent to the C option of space The Nelsis IC Design System Xspace User s Manual lat coup cap 3D capacitance inter sub res 3D sub res heuristics off BE mesh only selective elim discard ckt 2 4 display menu PairBoundary DrawTile DrawEdge DrawkResistor UndrawResistor DrawOutResistor DrawFEMesh DrawEquiLines Toggle lateral coupling capacitance extraction Equivalent to the l option of space Toggle 3 dimensional capacitance extraction Equivalent to the 3 option of space Toggle interpolated substrate resistance extraction Equivalent to the b option of space Toggle 3D substrate resistance extraction Equivalent to the B option of space Toggle network reduction heuristics Equivalent to the n option of space Construct the boundary element mesh for 3D capacitance extraction or 3D substrate resistance extraction but do not compute the capacitances or resistances this option is useful to inspect the mesh that is generated Extract RC models that are accurate up to a certain frequency Do not update the circuit database useful under R4 of the Nelsis system Draw white lines around each tile Draw tiles when they are found Draw input edges Toggle resistance drawing Only useful with resistance extraction enabled Toggle resistance undrawing Only useful with resistance extraction enabled Toggle drawing of resistances that are written to database Only
8. useful with resistance extraction enabled Toggle finite element drawing for resistance extraction Only useful with resistance extraction enabled Toggle drawing of equi potential lines in finite element mesh Only useful with resistance extraction enabled The Nelsis IC Design System Xspace User s Manual DrawBEMesh DrawGreen 3 dimensional DrawSubTerm DrawDelaunay DrawSubResistor 2 5 speed scroll bar Toggle drawing of 3D boundary elements Only useful with 3D capacitance extraction or 3D substrate resistance extraction enabled Toggle drawing of 3D green function evaluations Only useful with 3D capacitance extraction or 3D substrate resistance extraction enabled Toggle 3 dimensional drawing of boundary elements and green function evaluation Only useful with 3D capacitance extraction or 3D substrate resistance extraction enabled Toggle drawing of substrate terminals Only useful with substrate resistance extraction enabled Toggle drawing of Delaunay diagram between substrate terminals Only useful with interpolated substrate resistance extraction enabled Toggle drawing of substrate resistances between substrate terminals Only useful with substrate resistance extraction enabled Use the left bottom to move the slider to the left is slower and to the right is faster The Nelsis IC Design System Xspace User s Manual 6 3 The parameter file Besides that menu entries can be set by sett
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