Table 12-2. Component Placement Data Description; Figure 12-1. Example Of A Component Placement List In The Schematics - IBM PPC750FX User Manual

Evaluation Board Manual
PPC750FX Evaluation Board

Figure 12-1. Example of a Component Placement List in the Schematics

F
The information provided in each column of the component placement table is described in Table 12-2:

Table 12-2. Component Placement Data Description

1
Column Heading
REF
X
Y
R
M
Note 1: The column headings shown are representative only. The actual column headings will vary from schematic to schematic.
However, the information provided is the same in all cases.
All of the coordinates are referenced to the 0,0 datum point which is at the center of the mounting hole in the
bottom left corner of the board as viewed from the top side. The coordinate values in the table and the labels
on the board are given in thousandths of inches. For example, an X-coordinate value of 7995 indicates that
the component has an X-coordinate that is 7.995 inches from the 0,0 datum. Note that it is possible for
components to have negative coordinate values.
Bills of Materials
Page 102 of 115
REF X
BT1 7830
BT2 7995
C1 1135
C2 6330
Reference designator as it appears in the BOM and the schematics
X-coordinate of the component location
Y-coordinate of the component location
Rotation of the component in degrees
Shows which side of the board the component is on:
N = top side
Y = bottom side
8
Y R M
4260 180 N
1355 270 N
11130 90 N
11120 90 N
Description
Preliminary
750FXebm_ch12.fm
June 10, 2003