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| Date: | Mon, 11 Nov 1996 21:37:42 -0500 |
| Content-Type: | text/plain |
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This brief description of IPC-D-356 netlist fields may help:
IPC-D-356 Electrical Test Specification
Operation Code Definition (Columns 1-3)
Column 1 3 = Start of test point record
C = Comment information (IGI-Ext. mid-point
test record not in test point layer)
Column 2 1 = Feature & through hole
2 = Feature only (SMD etc.)
5 = Tooling feature (defined as such in
original data source)
6 = Tooling hole (defined in original data
or non-plated holes from IGI-Ext. Gerber
extraction)
Column 3 7 = This file is using the standard electrical
TEST record format
Signal Identification Field (Columns 4-20)
Column 4-17 = Net name (node number)
= N/C in columns 4-6 means single point
net / isolated points
Component Identifier Field (Columns 21-32)
Columns 21-26 = Reference designator (device nomenclature)
Column 27 = "-" A dash to separate the reference
designator from pin identifier
Column 28-31 = The pin identifier (pin number)
Column 32 = May contain a "M" to indicate a midpoint
Hole Definition Field (Columns 33-38)
Column 33 = "D" drilled hole identifier
Columns 34-37 = hole diameter in .0001" or .001mm
Column 38 = "P" indicates plated through hole (PTH)
= "U" indicates unplated through hole (NPTH)
Test Point Access Field (Columns 39-41)
Column 39 = "A" access code
Columns 40-41 = "00" test point accessible from
both sides (PTH)
= "01" test point is accessible from
side 1 (primary side)
= "0n" test point is accessible from
side "n" where "n" is usually
the last outer layer
Test Point Location Field (Columns 42-57) The (x,y) location of the best point.
Column 42 = Shall contain "X" to specify the X location
Column 43 = "+" or "-" or nothing to specify the
sign (nothing = "+")
Column 44-49 = Shall contain six digits representing
.0001" or .001mm as the smallest
increment. Leading zero's may be blanks
Column 50 = Shall contain "Y" to specify the "Y" location
Column 51 = "+" or "-" or nothing to specify the
sign (nothing = "+")
Columns 52-57 = Shall contain six digits representing
.0001" or .001mm as the smallest increment.
Leading zero's may be blanks
Feature Size Field (Columns 58-71) The (x,y) dimensions and rotations
for a rectangle feature.
Column 58 = "X" shall contain an "X"
Columns 59-62 = "X" dimension in .0001" or .001mm
Column 63 = "Y" shall contain "Y"
Columns 64-67 = "Y" dimension in .0001" or .001mm
Column 68 = "R" shall contain "R" to signify
counter clockwise rotation of feature
Columns 69-71 = Shall contain three digits to represent
rotation (000-360)
Column 72 = Is unassigned and should be left blank
Solder mask Field (Column 73-74)
Column 73 = "S" shall contain an "S" to signify solder
mask information
Column 74 = "0" specifies no solder mask
= "1" specifies primary side solder mask
= "2" specifies secondary side solder mask
= "3" specifies both sides solder masked
Alternate Test Point Record (Columns75-80)
Column 75 = "A" indicates an alternate test record exist
Column 76-80 = A five digit alphanumeric identification
representing to the alternate test record
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Greg Goodenbury
Conquest Technology, Inc. email: [log in to unmask]
95 E. Mitchell Hammock Road Tel: 407-359-1919
Oviedo, FL 32765-4705 Fax: 407-359-1918
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