update custom rule syntax help to make diff pair rule examples clearer
(cherry picked from commit 4442f76add
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@ -119,8 +119,8 @@ True if `A` has a hole which is plated.
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A.inDiffPair('<net_name>')
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A.inDiffPair('<net_name>')
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True if `A` has net that is part of the specified differential pair.
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True if `A` has net that is part of the specified differential pair.
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`<net_name>` is the base name of the differential pair. For example, `inDiffPair('CLK')`
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`<net_name>` is the base name of the differential pair. For example, `inDiffPair('/CLK')`
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matches items in the `CLK_P` and `CLK_N` nets.
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matches items in the `/CLK_P` and `/CLK_N` nets.
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<br><br>
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<br><br>
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AB.isCoupledDiffPair()
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AB.isCoupledDiffPair()
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@ -171,7 +171,7 @@ For the latter use a `(layer "layer_name")` clause in the rule.
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(rule "Via Hole to Track Clearance"
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(rule "Via Hole to Track Clearance"
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(constraint hole_clearance (min 0.254mm))
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(constraint hole_clearance (min 0.254mm))
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(condition "A.Type =='Via' && B.Type =='Track'"))
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(condition "A.Type == 'Via' && B.Type == 'Track'"))
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(rule "Pad to Track Clearance"
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(rule "Pad to Track Clearance"
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(constraint clearance (min 0.2mm))
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(constraint clearance (min 0.2mm))
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@ -195,7 +195,7 @@ For the latter use a `(layer "layer_name")` clause in the rule.
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# Specify an optimal gap for a particular diff-pair
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# Specify an optimal gap for a particular diff-pair
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(rule "dp clock gap"
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(rule "dp clock gap"
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(constraint diff_pair_gap (opt "0.8mm"))
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(constraint diff_pair_gap (opt "0.8mm"))
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(condition "A.inDiffPair('CLK') && AB.isCoupledDiffPair()"))
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(condition "A.inDiffPair('/CLK')"))
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# Specify a larger clearance around any diff-pair
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# Specify a larger clearance around any diff-pair
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(rule "dp clearance"
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(rule "dp clearance"
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