Static Highfanout Check (static_highfanout)
Description
This checks detect the MOSFETs having gate connected to a highfanout node,
and report nodes having count larger than specified count.
The results are reported into a file with the extension static.xml, which can be read with a web browser.
Syntax
Name static_highfanout parameter=value ...
Parameters
Design check parameters
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node
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[...]
|
Nodes to which the check is applied. Default is none.
|
|
upth
|
10
|
upth is to define the ratio of the width of PMOS (pull-up) and the loading of MOSFETs (with gate connection). The load of transmission gate are also considered. Default is 10.
|
|
downth
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20
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downth is to define the ratio of the width of NMOS (pull-down) and the loading of MOSFETs. Default is 20.
|
|
rcut
|
1e6
|
The resistor bigger than its value is cut. The default value is 1e6.
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Filtering parameters
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error_limit
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10000
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Maximum number of errors reported. Default is 10000.
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Wildcard scoping
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inst
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[...]
|
Subcircuit instances to which the check is applied. Default includes all instances (inst=*).
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xinst
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[...]
|
Subcircuit instances to be excluded from the check. Default is none.
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subckt
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[...]
|
The instances of the specified subcircuit to which the check is applied. Default includes all subcircuits (subckt=*).
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xsubckt
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[...]
|
The instances of the specified subcircuits that are excluded from the check. Default is none.
|
|
depth
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8
|
Hierarchy levels (starting from top, instance, or subcircuit scope) to be checked. Default is 8.
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