If the power can be symetricaly distributed amoung the slots I just mmake slotted symbols.
If the power can't or its a large device I make seperate power, configurations and i/o bank symbols (even these can be split up) the main point is that all symbols haveing the same refdes attribute will be considered a single symbol for netlisting. Steve Meier John Luciani wrote: > On Jan 29, 2008 4:25 AM, Richard Rasker <[EMAIL PROTECTED]> wrote: > > >> Usually, I try looking up a symbol with a similar layout, but I got a >> bit confused here. For example, there are two different CMOS 4053 >> symbols. The 4053-1.sym features separate dual-channel switches, >> selectable by defining the slot. But how do I connect the Enable and VEE >> pins (#6 and 7, respectively) to an arbitrary other component? And how >> to connect the power pins? When I look into the .sym file, I see that >> VDD, VSS and VEE have been defined as nets (with Enable tied to VSS -- >> which is not good). Does this mean that all VEE pins from multiple >> 4053's are automatically tied together? >> > > It sounds like there is a mistake in 4053-1.sym. > > Nets that are named the same get connected. What I do for power pins is > use a separate power symbol. Just make sure that both symbols have the > the same refdes. For digital symbols I usually have a separate page (or > section) > for power symbols and the corresponding local decoupling caps. > > I have a script that takes symbols with embedded power nets and > creates a series > of power symbols and non-power symbols. The script is called > create-np-symbols and is at > http://www.luciani.org/geda/util/util-index.html > > >> How do I define this device as four slotted opamp elements with >> dedicated standby and phantom ground pins? Or would I better create one >> big, 16-pin symbol incorporating everything? >> > > You could make a four slotted op-amp symbol and a separate > power/ground/standby > symbol. When you place the symbols in your schematic just keep the > refdeses the same. > > Depending on the amount of peripheral circuitry a 16-pin symbol could > also work. If > there is a lot of peripheral circuitry around each op-amp then I would > do the two > symbol approach. > > (* jcl *) > > _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user