User Guide
The swaplevel determines whether a device’s gates can be swapped
within the schematic diagram. The value that is currently set is − like the
addlevel − displayed above left in layer 93, Pins, for each gate. The de
-
fault value is 0, meaning that the gates may not
be exchanged. The
swaplevel can have a value from 0 to 255. Gates with the same swaplevel
canbeexchangedwithoneanother.
Our device consists of four identical gates that may be swapped. Click
on CHANGE, select the Swaplevel entry, and enter the value 1. Click
on the four OR gates. The information text in layer 93, Pins, changes
correspondingly.
Choosingthe Package Variants
In the device editor window, click on the New button at the lower right.
A window opens that displays the packages defined in this library. Select
the DIL-14 packageandgivetheversionname J.Clickon OK.
Repeat this procedure, select the LCC-20, and give the version name
FK.
In the list on the right you will now see the chosen package variants,
withasimplerepresentationoftheselectedpackageaboveit.
Clicking on a package variant entry with the right mouse button will
open a context menu. This allows variants to be deleted, renamed or
newly created, technologies to be defined, or the CONNECT com-
mandtobecalled.
Both entries are marked by a yellow symbol with an exclamation mark.
This means that the assignment of pins and pads has not yet been (fully)
carriedout.
The ConnectCommand
This must be the most important step in the library definition.
CONNECT assigns each pin to a pad. The way in which nets in the
schematic diagram are converted into signal lines in the layout is defined
here. Each net at a pin creates a signal line at a pad. The pin assignment
for the 541032 is specified in the data sheet. Check the connects in the
library with care. Errors that may pass unnoticed here can make the lay
-
outuseless.
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ComponentDesignExplainedthroughExamples