Subject: RE: [IBIS] Are power pins allowed in EBD paths?
From: Peters, Stephen (stephen.peters@intel.com)
Date: Tue Mar 19 2002 - 16:26:53 PST
Hi Matthew:
As far as I can tell, the EBD specification does not prohibit a GND or
POWER pin from being included a [Path Description]. I'm still researching
parser bug history (to see if this has been noted before), but I suspect
that this is a legitimate parser bug.
Regards,
Stephen
-----Original Message-----
From: Matthew Flora [mailto:mflora@innoveda.com]
Sent: Tuesday, March 19, 2002 12:28 PM
To: ibis@eda.org
Subject: [IBIS] Are power pins allowed in EBD paths?
Hello All,
I have an .EBD which contains a pin in its [Pin List] whose signal name is
GND_VSS. When that pin is used within a path description, IBISCHK3 reports
an
error:
ERROR - Pin '85' was referenced on Electrical Paths but is implicitly
connected to a power or a gnd plane
I don't recall seeing anything in the spec saying that supply pins are not
allowed in path descriptions. In this particular case, the pin is being
used
to pull down the resistor preceding it in the path:
[Pin List] signal_name
.
.
.
81 WP
82 SDA
83 SCL
85 GND_VSS
.
.
.
[Path Description] WP
Pin 81
Len = 0.00666309 L = 4.06154e-007 C = 9.02904e-011 R = 2.98978 /
Fork
Len = 0.00117565 L = 4.06154e-007 C = 9.02904e-011 R = 2.98978 /
Node U10.7
Endfork
Len = 0.0243456 L = 4.06154e-007 C = 9.02904e-011 R = 2.98978 /
Len = 1 L = 2.0e-010 C = 7.2e-013 R= 2.0e-002 /
Len = 0 R = 4.7e+004 /
Pin 85
Thanks,
Matthew Flora
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