The PAD command is used to add pads to a package. When the PAD command is active, a pad symbol is attached to the cursor and can be moved around the screen. Pressing the left mouse button places the pad at the current position and attaches a new pad symbol to the cursor. Entering a number changes the diameter of the pad (in the actual unit). Pad diameters can be up to 0.51602 inch (13.1 mm).
Example
PAD 0.06
The pad will have a diameter of 0.06 inch, provided the actual unit
is "inch". This diameter remains as a presetting for succeeding
operations.
Pad Shapes
A pad can have one of the following shapes (pad_shape):
Square | |
Round | |
Octagon | octagonal |
XLongOct | elongated in x direction |
YLongOct | elongated in y direction |
The two sides of elongated pads have a fixed ratio of 2:1. The longer one has to be entered as the parameter when such a pad is defined.
The pad shape or diameter can be selected while the PAD command is
active, or it can be changed with the CHANGE command, e.g.:
CHANGE SHAPE OCTAGON
The drill size may also be changed using the CHANGE command. The existing
values then remain in use for successive pads.
Because displaying different pad shapes and drill holes in their real
size slows down the screen refresh, EAGLE lets you change between
real and fast display mode by the use of the SET commands:
SET DISPLAY_MODE REAL | NODRILL | FAST;
Pad Names
Pad names (max. eight characters) are generated by the program automatically
and can be changed with the NAME command. The name can also be defined
in the PAD command. Pad name display can be turned on or off by means
of the commands:
SET PAD_NAMES ON | OFF;
This change will be visible after the next screen refresh.
Pad names with only three characters require much less memory than those with more than three characters.
Single Pads
Single pads in boards can be used only by defining a package with one pad. Via-holes can be placed in board but they don't have an element name and therefore don't show up in the netlist.
Alter Package
It is not possible to add or delete pads in packages which are already used by a device, because this would change the pin/pad allocation defined with the CONNECT command.
Index | Copyright © 1999 CadSoft Computer GmbH |