Provided by: alliance_5.0-20120515-6_amd64 bug


       phseg - mbk physical segment


       The  phseg  structure  is used to describe a segment belonging to a symbolic layout model,
       see phfig(3) for details.  Transistors are segments of a particular layer.

       The  declarations  needed  to  work  on  phseg  are   available   in   the   header   file
       "/labo/include/mph402.h", where '402' is the actual mbk version.

       The following C structure supports the description of the segment :
              typedef struct phseg {
                 struct phseg     ∗NEXT;
                 char             ∗NAME;
                 long             X1,Y1,X2,Y2;
                 long             WIDTH;
                 char             TYPE;
                 char             LAYER;
                 struct ptype     ∗USER;
              } phseg_list;

       NEXT                Pointer to the next segment in the list.

       NAME                Name  of  the  segment.  The  name is not an identifier, and a name is
                           present only if the designer used one for debug purposes.

       X1, Y1, X2, Y2      Coordinates of each end of the segment. Since it's a symbolic segment,
                           one alway has either X1 = X2 or Y1 = Y2. Furthermore, by construction,
                           it is warranty, if one accesses the data structure through  the  legal
                           functions, that X1 <= X2 and Y1 <= Y2.

       TYPE                This caracter can take four values :

                           LEFT or RIGHT       if  Y1  =  Y2.   The  exact  value  is  chosen  by
                                               addphseg, depending upon X1 and X2 relations.

                           UP or DOWN          if X1 = X2

       LAYER               Symbolic layer used for the segment. The legal values are :

                           NWELL               N bulk

                           PWELL               P bulk

                           NTIE                N implant in P bulk

                           PTIE                P implant in N bulk

                           NDIF                N diffusion

                           PDIF                P diffusion

                           NTRANS              N transistor

                           PTRANS              P transistor

                           POLY                polysilicium

                           ALU1                first metal

                           ALU2                second metal

                           ALU3                third metal

                           TPOLY               polysilicum through route

                           TALU1               first metal through route

                           TALU2               second metal through route

                           TALU3               third metal through route

       WIDTH               Width  of  the  segment.  The  physical  extension  of  a  segment  is
                           perpendicular to its direction.

       USER                Pointer  to  a  ptype  list,  see ptype for details, that is a general
                           purpose pointer used to share informations on the segment.


       mbk(1), addphseg(3), getphseg(3), delphseg(3), phfig(3), ptype(3).