NAME

phseg - mbk physical segment

DESCRIPTION

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 information on the segment.

NAME

DESCRIPTION

SEE ALSO