FreeLists / si-list / [SI-LIST] Re: Allegro ?

[Michael_Greim@xxxxxxxx]

Hi All,

This is an excellent way to make sure 
that your decoupling is where it needs 
to be.  By highlighting different voltages
with different colors, one can walk around
the board and make sure that all the different
voltages for a given chip are adequately 
decoupled.

I can't tell you how many times I have 
used this to find that a given rail of a 
chip is not decoupled at all or find decoupling 
capacitors that have nothing to with any
of the rails that a chip is powered by.
Just because a chip is surrounded by decoupling
capacitors can be misleading regarding what
is actually happening.

best regards,

Michael Greim

-----Original Message-----
From: Zabinski, Patrick J. [mailto:zabinski.patrick@xxxxxxxx]
Sent: Friday, April 05, 2002 10:29 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Allegro ?



Yes; I've used Mike's approach several times,
and it works quite well.

In addition, you can change the color (see color
pallete in the mini-status window), then highlight
another set of nets a different color, and so on.

I do this quite a bit, where I color VDD in Red,
VSS in Green, Vxx in Yellow, etc...  I also use
it when hand-routing large busses.

When done, simply use display/dehighlight.

Pat

> 
> display/highlight
> click on options tab on your right
> select color that you want for your net(s)
> click on find tab on your right
> find by name -> select net
> type in the name of the net below or click on more and select 
> all nets you
> want to highlight in that color.
> 
> Mike
> 
> 
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