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tools:netgen [2022/06/22 06:53]
rajit [Attributes] |
tools:netgen [2023/04/15 07:35] (current)
rajit [Output handling] |
| </code> | </code> |
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| | ===== Output handling ===== |
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| | ACT supports name mangling to sanitize the output so that it can be accepted by third-party tools. Since the largest variability in supported names is in different versions of SPICE, the ''prs2net'' tool also accepts another configuration file option called ''net.mangle_chars'' that can be used to change the name mangling that is used only for the output of ''prs2net''. (The meaning of this configuration parameter is the same as [[config:start#generic_configuration_settings|''act.mangle_chars'']]. |
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| ===== Attributes ===== | ===== Attributes ===== |
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| ^ Attribute ^ Meaning ^ | ^ Attribute ^ Meaning ^ |
| | keeper | The production rules for a signal are analyzed to determine if the pull-up and pull-down networks are perfect complements of each other. If they aren't, then a keeper is generated. There are two common scenarios when this behavior is undesired: (i) the gate is intended to be dynamic, and so it is state-holding but a staticizer should not be generated. Set ''keeper'' to ''0'' for this behavior. (ii) the gate looks state-holding, but it is actually a combinational gate because certain inputs are supposed to be complements of each other. In this case, set ''keeper'' to ''2''. | | | keeper | The production rules for a signal are analyzed to determine if the pull-up and pull-down networks are perfect complements of each other. If they aren't, then a keeper is generated. There are two common scenarios when this behavior is undesired: (i) the gate is intended to be dynamic, and so it is state-holding but a staticizer should not be generated. Set ''keeper'' to ''0'' for this behavior. (ii) the gate looks state-holding, but it is actually a combinational gate because certain inputs are supposed to be complements of each other. In this case, set ''keeper'' to ''2''. (iii) the gate is state-holding, is a C-element (uses ''#>''), is a two-input gate, and should use the H-topology C-element keeper structure. For this, set ''keeper'' to 3. | |
| | comb | If set to 1, uses combinational feedback rather than a weak inverter for the staticizer; if 0, uses a weak inverter instead of combinational feedback | | | comb | If set to 1, uses combinational feedback rather than a weak inverter for the staticizer; if 0, uses a weak inverter instead of combinational feedback | |
| | iskeeper | used to let prs2net know that the specified production rule is in fact the manually specified staticizer/keeper circuit. prs2net labels transistors used for keepers in the spice netlist, and this attribute can be used to ensure that manually specified keepers are also labeled (with ''_keeper''). | | | iskeeper | used to let prs2net know that the specified production rule is in fact the manually specified staticizer/keeper circuit. prs2net labels transistors used for keepers in the spice netlist, and this attribute can be used to ensure that manually specified keepers are also labeled (with ''_keeper''). | |