Re: gEDA-user: [Fwd: Re: Separate Vcc voltages]

[Jonatan Åkerlind <jonatan@xxxxxxxxxxx>]

On fre, 2007-07-13 at 05:04 -0700, Steve Meier wrote:
> I like partially embeded nets. Large chips, even small ones might have
> several power pins which are internally connected. Rather then bloat a
> symbol showing all of these pins, I like to make a embeded or hidden net
> that includes all these pins and then make one of these pins visible.
> The netlister then has to check a symbol to see if any of the pins are
> vissible and connected to an external net and if so then connect the
> rest of the hidden net to the correct net.
> 
> Steve Meier

yes, this is fine if your chip has multiple pins which are internally
connected (and the hidden net name isn't one of Vdd or Vcc or anything
similar). The thing is when you have multiple chips requiering different
Vdd voltages and they all have the Vdd or Vcc hidden net internally.
Then you cannot connect separate supply voltage to them without either
adding another attribute in the schematic or altering the symbol to make
the supply pin show.

-- 
Jonatan Åkerlind <jonatan@xxxxxxxxxxx>



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