Virtuoso AMS Environment User Guide

Variables for ams.env Files

useDefparam

Controls the netlisting of parameters passed onto instantiated modules.

Syntax

amsDirect.vlog useDefparam boolean t | nil

Description

The AMS netlister passes parameters by assigning instance parameter values; it passes parameters by name to child instances. Note that Verilog-XL and other digital simulators do not support passing parameters via instance parameter value assignments.

Another way to pass parameters is to use a defparam statement. If you specify t, the AMS netlister uses the defparam statement to pass parameters instead. One defparam statement is generated for each instantiation that requires passed parameters.

Example

amsDirect.vlog useDefparam boolean nil

Tells the AMS netlister to pass parameters by assigning instance parameter values. The following netlist results:

module mybuf (a, b); input a;

output b;

myinv #(.setup(10), .hold(5)) i0 (a, net10); myinv #(.setup(10), .hold(5)) i1 (net10, b);

endmodule

Example

amsDirect.vlog useDefparam boolean t

Virtuoso AMS Environment User Guide

Variables for ams.env Files

Tells the AMS netlister to pass parameters by using defparam statements. The following netlist results:

module mybuf (a, b); input a;

output b;

myinv i0(a, net10);

defparam i0.setup = 10, i0.hold = 5; myinv i1(net10, b);

defparam i1.setup = 10, i1.hold = 5;

endmodule

Virtuoso AMS Environment User Guide

Variables for ams.env Files

useNcelabNowarn

Controls whether the list of suppressed warnings on the Elaborator Messages/Errors pane of the AMS Options window is used.

Syntax

amsDirect.prep useNcelabNowarn boolean t | nil

Example

amsDirect.prep useNcelabNowarn boolean nil

Removes the checkmark next to the Suppress specific warnings field. As a result, the -nowarn option of the ncelab command is not used and the listed warnings are not suppressed during elaboration.

Virtuoso AMS Environment User Guide

Variables for ams.env Files

useNcelabSdfCmdFile

Controls whether an SDF command file specified on theSDF Annotation pane of the AMS

Options window is used.

Syntax

amsDirect.prep useNcelabSdfCmdFile boolean t | nil

Example

amsDirect.prep useNcelabSdfCmdFile boolean nil

Tells the elaborator to use an SDF command file if one is specified in theUse SDF command file field.