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a) Adding a new package
To add a package, click the
order set out below to add a new package :
Decide on the measurement units for your package design. Select either
Grid Size
an appropriate
In the package editor, you can use the grid toolbar to specify the design grid, in inches or millimetres, to use with your
package. This makes placement of objects easier, but you can also place objects at arbitrary locations by turning off
the
Snap to grid
clicking the up down control or by directly typing a value in the control.
Once you have defined a grid and have
positioned on a multiple of the grid setting. When you resize an object, the part of the object you are resizing will be
located on the next available grid boundary. Note however that to resize an object to the grid you must resize both X
and Y dimensions.
Select tools from the drawing toolbar. Use any combination of shapes and pins to make the package look like the real
thing.
The vertical toolbar at the left provides the following functions :
Selection
(size, colour etc) are shown in the property grid at the bottom of the window.
Add pin
you add. Subsequent pins will be the same size and shape as the previous pin added. The properties of the
pin (size, location, shape, number) are displayed in the property grid at the bottom of the window when a pin
is selected. You can change the properties of the pin by resizing with the mouse and/or by using the controls
in the pin property grid.
Add shape
are displayed in the property grid at the bottom of the window when a shape is selected. You can change the
properties of the shape by resizing with the mouse and/or by using the controls in the shape property grid.
Rotate
tools for rotating the selected shape or pin clockwise or anti-clockwise through 90 degrees.
Bring to front/send to back
Renumber
Package Type
Enter a suitable
or QFP, and may already be in the dropdown list.
Enter a suitable
Description
for example.
You have now completed adding a new package. Click
Name
. Enter a suitable name for the package and click
Note : The zoom toolbar allows you to zoom in and out of the package you are designing in a variety of ways. You can select a
preset zoom level from the drop down list, or click the + and – buttons to zoom in and out as required. You can also zoom to
fit the entire available design area. In addition, you can enter a zoom level as numeric text in the zoom control.
Page Up
Page Down
The
,
the mouse wheel (if available) can also be used to zoom in and out.
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New
button to open the
for the package you are about to create.
option. The minimum grid size is zero (which is equivalent to no grid). You can change the grid by
Show grid
tool to allow objects on your package to be selected. When you select an object, its properties
tool for adding pins to your package. Each pin has a number, which will default to 1 for the first pin
tool for adding shapes to your package. The properties of the shape (size, location, colour, style)
tools for setting the Z order of shapes and pins when they overlap.
tool for resetting the pin numbers on the package after adding or deleting pins.
for the package – this will usually be one of the standard package types i.e. DIL, PLCC
for the package – this will usually be something specific to this package design, its pitch
Home
and
keys can also be used to zoom in, zoom out and zoom to fit respectively. In addition,
Package Editor
with a blank package. Please follow the steps in the
Snap to grid
and
enabled, all objects you place and drag will be
File/Save
from the menu and you will be prompted for a
OK
. The package is now saved and complete.
mm
or
in
from the grid toolbar. Then, set
Package
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