XSPACE USER`S MANUAL
Contents
1. Key o Zoom out on current pointer position Key O Zoom out on middle of display Key u Undo last zoom Key x Zoom use position as new lower left corner Key y Zoom use position as new upper right corner Key Give layout position of current pointer position Key Ctrl c Abort extraction or extract again mode Key Ctrl l Redraw display but do not use clear The Nelsis IC Design System Xspace User s Manual 9 4 The Parameter File Besides that menu entries can be set by setting 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 space parameter file Setting the following boolean parameters corresponds to setting the following menu entries parameter menu entry disp syne 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_capacitor DrawCapacitor disp undraw_capacitor UndrawCapacitor disp draw_out_capacitor DrawOutCapacitor 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 DrawSubResistor2. 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 database units 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 The Nelsis IC Design System Xspace User s Manual 10 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 disp save_prepass_image boolean default off Set the following parameter when no display clear must be done before a new extraction It keeps the current window contents and dimension disp save_extract_image boolean default off When the following parameter is set to off the menu bar of Xspace is omitted The default value is on for Xspace and off for space3d using the X option disp show_menu boolean 4 1 Camera Parameters The point of view for a 3D picture can be
3. changed with the following two parameters With the camera latitude parameter set to 90 degrees you are looking from above to the picture disp cam_latitude real default 30 degrees With the following parameter you can set the camera longitude With the default you see the x axis from left to right disp cam_longitude real default 270 degrees With the following parameter you can set the camera distance to get more or less perspective disp cam_distance real default 2 0 With the following parameter you can set parallel perspective disp cam_parallel boolean default off 4 2 Other Parameters With the following parameter you can specify an alternate substrate contact fill color used for 2D tile drawing This new color is only used in place of black color fills Note that both Display Menu settings DrawTile and DrawSubTerm must be on disp def_color_sub_con string default white Xspace tries to use the GXor mode for the graphics context However when the picture looks incorrect you can set the GXcopy mode The Nelsis IC Design System Xspace User s Manual 11 disp use_pixel_copy_mode boolean default off To set another file for the robot menu command give the following parameter disp program_file string default program Additional drawing commands may be given from a drawing file When you want this specify with the following parameter the name of this file disp draw_file st
4. position draw a bigger cross at given position draw a small plus at given position draw a bigger plus at given position draw a small hor mark at given position draw a bigger hor mark at given position draw a small vert mark at given position draw a bigger vert mark at given position draw a line between the two given points draw a rectangle using the two given points draw 3D rectangle around y axis using the two points draw 3D rectangle around z axis using the two points The Nelsis IC Design System Xspace User s Manual 13 5 Mask Colors The colors that are used to display the different masks conductors are specified in the space element definition technology file The specification must be placed 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 X1 1 rgb txt including the special color glass which means in fact invisible Moreover RGB values can be specified in the X fash
5. XSPACE USER S MANUAL A J van Genderen N P van der Meijs Circuits and Systems Group Department of Electrical Engineering Delft University of Technology The Netherlands Report ET NS 96 02 Copyright 1996 2005 by the authors All rights reserved Last revision April 25 2005 Xspace User s Manual 1 1 Introduction Xspace is the graphical display tool of the space3d program and is an X Window System based application Xspace is used to show the resistance mesh and the boundary element mesh that are generated by the space3d program and to show how the space3d program works from an algorithmic point of view Xspace starts the space3d program for each extraction request you give The space3d program produces a display out file which is read by Xspace while the space3d program is running Xspace can be invoked as follows Xspace space3d options X X toolkit options cell All options of space3d see the Space User s Manual may be used with Xspace Note that when an option of Xspace is given on the command line that corresponds to an option that can be set in the menu of Xspace this option will be enabled in that 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 at the command line and or in the parameter file In con
6. ace User s Manual 7 3 Hotkeys You can use the keys of the keyboard to give commands to the Xspace program Some of these commands are also menu buttons Most commands may also be given during the extraction process The not earlier mentioned keys are given below 3 1 Camera Hotkeys See also the Camera Parameters section With the arrow hotkeys its is possible to change the camera viewpoint To see the new 3D drawing result a new extraction must be done New values can only be chosen when in 3 dimensional mode KP Key Camera longitude 15 degrees KP Key gt Camera longitude 15 degrees KP Key 4 Camera latitude 15 degrees minimum 0 degrees KP Key T Camera latitude 15 degrees maximum 90 degrees KP Key Increase the camera perspective distance KP Key Decrease the camera perspective distance KP Key Toggle 3D drawing mode 3 2 Coordinates Hotkeys A number of hotkeys is used to specify and display a coordinate point You can interactively enter a x y z value The z value is only used in 3D mode There are two interactive modi the g mode and z mode The interactive modi are canceled when you specify an incorrect hotkey Key g Initiate to enter a goto point x value begin change g mode Key Initiate to enter a goto point y value begin change g mode In 3D mode toggle between y value and z value Key z Initiate to enter a goto point z value when in 3D g mode When not in g mo
7. de the current z value can be changed default 0 in the z mode Key Enter Display the entered goto point end g mode When the point is outside the window jump to the coordinate point position You can directly give this command without entering the g mode Keys 0 9 To enter a digit for a coordinate value The first digit after an initiate clears the current value The Nelsis IC Design System Xspace User s Manual 8 Key Enter a decimal point and maximum 3 digits behind it Only valid when parameter disp coord_in_microns is on Key To toggle the coordinate value from positive into negative Note that a zero value can only be positive Key In g mode the x value or y value takes over the current value of the pointer position It initiate the x value or y value again Outside g mode both the x value and y value are set Key Backspace Delete the last digit or decimal point of a x y z value Note also useful for adding digits to a value Key Escape Cancel the current mode and display the cell bounding box 3 3 Other Hotkeys Key Move picture a half window to the left Key gt Move picture a half window to the right Key 4 Move picture a half window down wards Key T Move picture a half window up wards Key m Move picture on pointer position to middle of display Key b Zoom in out to the cell bounding box Key i Zoom in on current pointer position Key I Zoom in on middle of display
8. ead of the default font which is variable or from Xdefaults Set the window size to W by H and place the window at location X Y Start the program as an icon 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 Windows 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 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 For Xspace examples see the Space 3D Capacitance Extraction User s Manual and the Space Substrate Resistance Extraction User s Manual NOTE The X toolkit options are parsed before the space3d options To be sure that options like ic and rv are recognized as space3d options you can start these options with a sign like ic 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 Note that hotkeys are defined for most menu items of this menu A defined hotkey is given between parentheses extract e Start space3d to do the extracti
9. ion 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 For example red and green becomes yellow Note define only colors for masks when needed Each new color except white amp black doubles the internal colormap space Note that a maximum of 20 different colors can be used for transparent tile drawing An example to specify the colors of masks np nd nm ni and sub is as follows colors np red nd green nm blue ni CCC nb magenta nx cyan ng black nc black sub pink The user can overwrite one of the above color specifications by specifying a color_maskname parameter in the space parameter file For example disp color_ni C8F disp color_ sub orange The Nelsis IC Design System Xspace User s Manual 6 Usage of Xdefaults The Xdefaults file in the users home directory is used to set X Windows 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 Xs
10. ll to exclude cells from the menus When you want only specific cells in the menus use disp only_cells cell A cell may end with an and the wildcard character may also be used 2 3 Options Menu Note that a number of menu items automatically are selected or deselected resistance metal resistance mesh refinement capacitance coupling cap lat coup cap 3D capacitance inter sub res 3D sub res heuristics off BE mesh only selective elim Toggle non metal interconnect resistance extraction Equivalent to the r option of space res_values gt low_sheet_res Toggle non metal and metal interconnect resistance extraction Equivalent to the R option res_values gt 0 Apply a mesh refinement for resistance extraction This gives more accurate resistance values equivalent to z Toggle ground capacitance extraction Equivalent to the c option of space Toggle coupling capacitance extraction Equivalent to the C option of space 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 Do not compute the capacita
11. nces or resistances but construct only the boundary element mesh This option is useful for 3D capacitance extraction or 3D substrate resistance extraction Equivalent to the U option of space Extract RC models that are accurate up to a certain frequency Equivalent to the G option of space The Nelsis IC Design System Xspace User s Manual 2 4 Display Menu PairBoundary DrawTile DrawEdge DrawPosition DrawResistor UndrawkResistor DrawOutResistor DrawFEMesh DrawEquiLines DrawCapacitor UndrawCapacitor DrawOutCapacitor DrawBEMesh DrawGreen 3 dimensional DrawSubTerm Draw white lines around each tile To see also tiles to infinity give parameter disp pair_to_infinity To get only lines around tiles with conductivity use the disp pair_conduct_only parameter Draw tiles when they are found Draw input edges Draw scanline position using pointer 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 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 Toggle capacitance drawing Only useful with capacitance e
12. on process extract again a Show display file of an extraction again save pp image Toggle see parameter disp save_prepass_image save ep image Toggle see parameter disp save_extract_image display clear c Clear the display see the save image parameters quit q Stop the program and exit pause p Start stop pause showing the extraction output pause afterpp Goto pause after each prepass parameter disp pause_after_pp sync Toggle X Window System synchronous mode for easier debugging and sometimes better pictures run free f Don t look for events any more gives fastest drawing but can not be interrupted until the extraction is finished single step s Go to single step mode Use the s key to do a single step Use the d key to go back to the normal delayed extraction mode see also the speed scrollbar robot r Start stop a free hand demo by executing the commands that are described in the file program reset robot R Reset the automatic demo program Closes and opens the program file again load params l Read the used space parameter file again 2 2 Database Menu A sorted list of cells in the database radio buttons Maximum 34 cells in one menu Maximum 102 cells in three separate database menus Databasel Database2 and Database3 A specified dummy cell argument can position the cells in the menus The Nelsis IC Design System Xspace User s Manual 4 Use parameter disp excl_cells ce
13. pace Scrollbar background Xspace Scrollbar foreground Xspace canvas borderColor Xspace canvas borderWidth Xspace canvas height Xspace canvas width Xspace delayWidget Xspace menu borderColor Xspace menu hSpace Xspace menu vSpace Xspace menuAside Xspace messageWindow tSteelBlue lack creen b 16 low ley pe Q D oO n Lack LOW Lack ellow w Q K tSteelBlue o eles TK HUN Oo Ea E Q ma 6z 375 500 True LightSteelBlue 2 10 False False The Nelsis IC Design System
14. ring default none 39 9 The displayed coordinates see g and z keys are default in internal units To use database units or microns specify one of the following parameters disp coord_in_dbunits boolean default off disp coord_in_microns boolean default off 4 3 Draw File Commands Each line of the draw_file can contain a drawing command To execute the command it must begin at the first position on the line The most simple command draws a dot on the screen To do this you need only to specify a x value and y value Blanks may be used no tabs to separate the values A comma directly behind the value may also be used A comma behind a y value is needed to specify a z value for 3D mode When no z value is given zero is used The second coordinate point inherit default the z value of the first point The x value and y value must always be specified Note that all other commands begin with a command key letter All commands except the unit commands may be followed by a text string which must be displayed All coordinate values are default in internal units The following unit and drawing commands can be used The Nelsis IC Design System Xspace User s Manual 12 X X y X x y pxy P x y h x y H x y vV X y V x y lpl p2 r pl p2 y pl p2 z pl p2 use database units for coordinate values use internal units for coordinate values use microns for coordinate values draw a small cross at given
15. trast to when the option X is not used the program will immediately start the extraction NOTE The space3d program runs always in flat extraction mode when started by Xspace With option v the space3d program tells that this Flat extraction mode is forced to on There is one exception when parameter expand_connectivity is set then the program is using the pseudo hierarchical extraction mode Further the following standard X Windows toolkit options are recognized by Xspace bg color or background color Set the background color to color Available color names are normally found in the file asr 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 The Nelsis IC Design System Xspace User s Manual fg color or foreground color fn font or font font geometry WxH X Y iconic name name rv or reverse Irv title title xrm lt any X resource gt NOTE Set the foreground color to color The specified font will be used inst
16. xtraction enabled Toggle capacitance undrawing Only useful with capacitance extraction enabled Toggle drawing of capacitances that are written to database Only useful with capacitance extraction enabled Toggle drawing of the boundary element mesh Only useful with 3D capacitance substrate resistance extraction enabled Toggle drawing of the Green s function evaluations Only useful in combination with DrawBEMesh Toggle 3D drawing for DrawBEMesh and DrawGreen Toggle 2D drawing of the edges of substrate terminals Only useful with substrate resistance extraction enabled The Nelsis IC Design System Xspace User s Manual 6 FillSubTerm Toggle 2D drawing of the tiles of substrate terminals DrawDelaunay Toggle drawing of Delaunay diagram between substrate terminals Only useful with interpolated substrate resistance extraction enabled DrawSubResistor Toggle drawing of substrate resistances between substrate terminals only useful when sub res extraction is enabled 2 5 Speed Scrollbar Click in the scrollbar window to choice another drawing speed or drag the slider to another position To the left is slower more delay and to the right is faster You can also use the Page Down and Page Up hotkeys to set another speed With the above handlings you enter also the delayed extraction mode again except in pause You can also use the d key to go to the delayed mode The Nelsis IC Design System Xsp
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