tribuf_xbit :
A tri-state buffer with xbit-type input/output’s.

The tribuf_xbit primitive models a tri-state buffer gate with an inertial delay. It is suitable for processing digital signals of which precise timing information must be preserved.

Note that the tribuf_xbit primitive does not leave the output at a high-Z state when it is disabled. Since xbit is a variable type (like a reg), the output will retain its previous value when it is not driven.

The propagation delay of the logic gate is specified by the parameter delay. The implemented delay is inertial, meaning that if a new input event arrives before the previous input event propagates to the output, the output event will be overriden with the one corresponding to the new input event. If a transport delay behavior is desired, use the delay_xbit primitive instead.

Input/Output Terminals

Name	I/O	Type	Description
out	inout	xbit	tri-state output signal
in	input	xbit	input signal
en	input	xbit	enable signal

Parameters

Name	Type	Default	Unit	Description
delay	real	0.0	seconds	propagation delay