xbit_to_xreal_var :
An xbit-to-xreal connector with variable logic-1 and logic-0 levels.

The xbit_to_xreal_var primitive converts an xbit-type signal to an xreal-type signal with variable logic-1 and logic-0 levels. The digital level of the input signal is converted to an analog level, defined by the two external inputs: level0 and level1.

The parameters Rout and Cout specify the optional output resistance and capacitance, respectively. The output resistance effectively sets the driving strength and output capacitance sets the transition time of the connector.

The parameters valueX and valueZ define the mapped values of logic X and logic Z, respectively. For example, if valueX is set to 0, all input values corresponding to logic X are treated as logic 0. Note that by default, the primitive leaves the output floating at its last value when the input has a logic X or logic Z value.

Input/Output Terminals

Name	I/O	Type	Description
out	output	xreal	xreal-type output
in	input	xbit	xbit-type input
level0	input	xreal	conversion level for logic 0
level1	input	xreal	conversion level for logic 1

Parameters

Name	Type	Default	Unit	Description
width	integer	1	None	connector bit-width
Rout	real	0.0	ohms	output resistance
Cout	real	0.0	farads	output capacitance
valueX	logic	1’bx	None	mapped value of logic X
valueZ	logic	1’bz	None	mapped value of logic Z