User Guide

DeviceswithSeveralGates
Some devices consist not of one but of several gates. These can normally
be placed onto the schematic diagram one after another with the ADD
command.Toplaceacertaingateyoucanusethegatenamedirectly.
Example:
The device 74*00 from the 74xx-eu library consists of for NAND gates
named A to D and one power gate named P. If you want to place the gate
C first,usethegatenamewiththeADDcommand:
ADD'IC1''C'[e-mail]
SeealsohelpfunctionfortheADDcommand.
As soon as one gate has been placed, the next one is attached to the
mouse (addlevel is Next). Place one gate after another on the diagram.
When all the gates in one device have been used, the next device is
broughtin.
If the gates in one device are distributed over several sheets, place them
first with ADD, change to the other sheet of the schematic diagram, and
type,forexample
INVOKEIC1
on the command line. Select the desired gate from the INVOKE
window.
WiringtheSchematicDiagram
DrawNets(NET)
The NET command defines the connections between the pins. Nets be
-
gin and end at the connection points of a pin. This is visible when layer
93, Pins,isdisplayed(DISPLAYcommand).
Nets are always given an automatically generated name. This can be
changed by means of the NAME command. Nets with the same name
are connected to one another, regardless of whether or not they appear
continuous on the drawing. This applies even when they appear on dif
-
ferentsheets.
If a net is taken to another net, a bus, or a pin connecting point, the net
line ends there and is connected. If no connection is made when the net
is placed, the net line continues to be attached to the mouse. This behav
-
ior can be changed through the Options/Set/Misc menu (using the Auto
end net and bus option). If this option is deactivated, a double click is
neededtoendanet.Netsareshownonlayer91, Nets.
Nets must end exactly at a pin connecting point in order to be joined. A
netisnotjoinedtothepinifitendssomewhereonthepinline.
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FromSchematictoFinishedBoard