


SPACE(3ICD)		     23/3/88		      SPACE(3ICD)



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     space - technology files for the space layout to circuit
     extractor.

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     The _s_p_a_c_e (1ICD) layout to circuit extractor is technology
     independent.  At start up, it reads a tabular element defin-
     ition file specifying how the different elements like con-
     ductors and transistors can be recognized from the different
     mask combinations, and which values should be used for, for
     example, conductor capacitivity and conductor resistivity.
     This tabular element file is constructed from a user-defined
     element definition file by the space technology compiler
     _t_e_c_c(1ICD).  For a description of the format of such a file,
     see _t_e_c_c(1ICD).

     The default element definition file is _s_p_a_c_e._d_e_f._t in the
     appropriate directory of the ICD process library.	However,
     there can be several other element definition files for a
     particular process.  For example, the file _s_p_a_c_e._m_a_x._t may
     contain an element description with worst-case capacitance
     and resistance values.  This file can be read rather than
     the standard file by specifying -_e _m_a_x while invoking space.
     The user can also prepare his own element definition file
     and specify the name of that file with the -_E option of
     space.  For preparation of a customized element definition
     file, it is perhaps best to modify a copy of the source of
     one of the ``official'' element definition tables.  These
     sources are also in the ICD process library.

     Additionaly, some aspects of _s_p_a_c_e are under control of some
     parameters that are specified in a parameter file.  This
     file contains some key-value pairs, one per line, adjusting
     some of the defaults of space.  For a description of all
     settable parameters, see space (1ICD).

     The default parameter file is _s_p_a_c_e._d_e_f._p in the appropriate
     directory of the ICD process library, but the user can
     choose other parameter files with the -p or -P options of
     space.

AAAAUUUUTTTTHHHHOOOORRRRSSSS
     A.J. van Genderen, N.P. van der Meijs

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     ICDPATH/lib/process/_p_r_o_c_e_s_s/space.def.t
			 default element definition file
     ICDPATH/lib/process/_p_r_o_c_e_s_s/space.def.s
			 source of default element definition
			 file
     ICDPATH/lib/process/_p_r_o_c_e_s_s/space.def.p
			 default parameter file



		   The Nelsis IC Design System			1






SPACE(3ICD)		     23/3/88		      SPACE(3ICD)



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     space (1ICD), tecc (1ICD)





















































2		   The Nelsis IC Design System



