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| Reply To: | DesignerCouncil E-Mail Forum. |
| Date: | Tue, 15 Sep 1998 13:29:06 -0500 |
| Content-Type: | text/plain |
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Derek,
One thing I have found to be an absolute necessity is to freeze a copy of
the schematic after generating the Pads netlist until you are ready for back
annotation from Pads or need to forward annotate schematic changes while
layout is in process. What I have found to happen is that while the board
is in layout, the engineer makes changes to the schematic. If both the Pads
and Viewlogic netlists have changed, automatic synchronization may become
nearly impossible. Only change one netlist at a time (either Pads or
Viewlogic), then synchronize the two before any other changes are made.
We have also found that it is cleaner to make netlist changes in viewlogic
and forward annotate them to Pads, as opposed to using the Pads ECO
functions to change any connections. We limit Pads netlist changes to
resequencing of the reference designators. It also helps to have one person
who understands both programs in control of the Viewlogic schematic and the
Pads layout if possible. If the two are controlled by different
individuals, both must understand how their changes affect the other program
and keep clear communication throughout the development cycle.
Jon DeGenova
Micro Industries
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]]On
> Behalf Of Derek
> Wynne
> Sent: Monday, September 14, 1998 6:38 AM
> To: [log in to unmask]
> Subject: [DC] ECO Control using PADS & Viewdraw.
>
>
> This message is in MIME format. Since your mail reader does
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>
> ------ =_NextPart_001_01BDDFCB.BD246E50
> Content-Type: text/plain;
> charset="iso-8859-1"
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>
> Hi Folks,=20
>
> We are having nightmarish problems controlling Eco's while using
> Viewdraw and PAD's.=20
> The process is so open to disastrous error by the operator that it has
> cost us significant=20
> amounts of time back-tracking to recover files and data. Has anyone =
> else
> had experience of the=20
> interface between these tools and if so what procedures did you use to
> control the process.=20
>
>
> Thanks in advance.=20
>
> Derek=20
>
>
>
>
> Derek J. Wynne=20
> Design Engineer.=20
> Toucan Technology Ltd.=20
> I.D.A. Business Park=20
> Dangan=20
> Galway City=20
> Ireland.=20
> =20
> Telephone: +35391519913=20
> Fax: +35391519901=20
> E-mail: [log in to unmask] < mailto:[log in to unmask]>=20
> =20
>
>
> ------ =_NextPart_001_01BDDFCB.BD246E50
> Content-Type: text/html;
> charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
> <HTML>
> <HEAD>
>
> <META NAME=3D"Generator" CONTENT=3D"MS Exchange Server version =
> 5.5.1960.3">
> <TITLE>ECO Control using PADS & Viewdraw.</TITLE>
> </HEAD>
> <BODY>
>
> <P><FONT SIZE=3D2>Hi Folks,</FONT>
> </P>
>
> <P><FONT SIZE=3D2>We are having nightmarish problems
> controlling Eco's =
> while using Viewdraw and PAD's.</FONT>
> <BR><FONT SIZE=3D2>The process is so open to disastrous error by the =
> operator that it has cost us significant </FONT>
> <BR><FONT SIZE=3D2>amounts of time back-tracking to recover
> files and =
> data. Has anyone else had experience of the </FONT>
> <BR><FONT SIZE=3D2>interface between these tools and if so what =
> procedures did you use to control the process.</FONT>
> </P>
> <BR>
>
> <P><FONT SIZE=3D2>Thanks in advance.</FONT>
> </P>
>
> <P><FONT SIZE=3D2>Derek</FONT>
> </P>
> <BR>
> <BR>
> <BR>
>
> <P><FONT SIZE=3D2>Derek J. Wynne</FONT>
> <BR><FONT SIZE=3D2>Design Engineer.</FONT>
> <BR><FONT SIZE=3D2>Toucan Technology Ltd.</FONT>
> <BR><FONT SIZE=3D2>I.D.A. Business Park</FONT>
> <BR><FONT SIZE=3D2>Dangan</FONT>
> <BR><FONT SIZE=3D2>Galway City</FONT>
> <BR><FONT SIZE=3D2>Ireland.</FONT>
> <BR><FONT SIZE=3D2>=A0</FONT>
> <BR><FONT SIZE=3D2>Telephone: +35391519913</FONT>
> <BR><FONT SIZE=3D2>Fax:=A0=A0=A0=A0=A0=A0=A0=A0=A0 +35391519901</FONT>
> <BR><FONT SIZE=3D2>E-mail:=A0=A0=A0=A0=A0=A0 [log in to unmask] <<A =
> HREF=3D"mailto:[log in to unmask]" =
> TARGET=3D"_blank">mailto:[log in to unmask]</A>> </FONT>
> <BR><FONT SIZE=3D2>=A0</FONT>
> </P>
>
> </BODY>
> </HTML>
> ------ =_NextPart_001_01BDDFCB.BD246E50--
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