i don't think 99SE ERC will catch this

i did look into it at that time, i will look again later

Dennis Saputelli


Abd ul-Rahman Lomax wrote:
> 
> At 09:42 PM 12/19/2003, Dennis Saputelli wrote:
> >i once had a power port symbol "+12V2" connected to one end of
> >a resistor
> >
> >the rest of the board was all "+12V" for that power and i didn't
> >notice it
> >good 'ol cut and paste - it wasn't my fault! :)
> >
> >anyway the resistor didn't go anywhere on one end
> >and in the usual mad proto rush it was shipped because the
> >DRC was happy
> 
> DRC would be happy, but a properly configured ERC would not. I always have
> ERC report unconnected pins, and I nail them all down: if there is a
> deliberately unconnected pin, I place a No-ERC directive on it, which from
> then on suppresses the ERC report.
> 
> >does DXP catch this ?
> 
> Since 99SE would, I assume DXP also would.
> 
> >BTW, this is not a 'single pin net' since the netlist shows 2
> >items:
> >+12V2
> >R112-2
> >
> >the 'isolated' power port counts kind of like a 'pin'
> 
> No, I don't think so, unless ERC is misconfigured. Normally, writing here,
> I'd check this, but time is short today. But even if ERC will detect such
> single pin nets, there is still a problem; what if there had been, say, a
> capacitor also connected to +12V2? DXP is not, I am sure, going to catch
> this. But there are procedures that could use 99SE/DXP tools to make it
> easy to find such problems. But you still have to remember to look for them.
> 
> >i poked around a bit in 99SE and couldn't find a way to flag it
> >
> >yes manually inspecting the netlist would have caught it and
> >truthfully isn't very hard to scan through even a big net list
> >for this sort of thing
> 
> I used to always run an NC pin list from PCB, it was part of the Tango DRC
> options. A resistor appearing in that list would be a big red flag. It can
> be a very good idea to look at a list of nets (not a full net list but a
> list of net names) to see if there are any oddities, like
> 
> DATA1
> DATAl
> 
> (Yes, those are different! If they weren't, they wouldn't show up as two
> entries in the list, would they? A really sophisticated ERC/DRC would
> generate a warning if there were such similar net names)
> 
> >and for the record ...
> >at one time i may have been in the DXP-basher camp (some time ago)
> >
> >at this point since i have not used DXP much i don't think it would
> >be objective or fair for me to bash
> >i hope i have not lately presented such an attitude
> >
> >i would prefer to be categorized as simply a non-DXP user who is
> >very reluctant to 'move on' based on what i saw during a few
> >brief forays
> >
> >when 2004 ships i intend to give it another go
> 
> Since I'm exploring DXP now, I'm thinking of writing a 99SE -> DXP training
> document, that focuses on informing an experienced 99SE user how to move to
> DXP....

-- 
_______________________________________________________________________
Integrated Controls, Inc.           Tel: 415-647-0480  EXT 107 
2851 21st Street                    Fax: 415-647-3003
San Francisco, CA 94110             www.integratedcontrolsinc.com



* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this list visit:
* http://www.techservinc.com/protelusers/leave.html
*
* Contact the list manager:
* mailto:[EMAIL PROTECTED]
*
* Forum Guidelines Rules:
* http://www.techservinc.com/protelusers/forumrules.html
*
* Browse or Search previous postings:
* http://www.mail-archive.com/[EMAIL PROTECTED]
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

Reply via email to