hades.models.flipflops
Class Dffr

java.lang.Object
  hades.simulator.SimObject
      hades.models.flipflops.GenericFlipflop
          hades.models.flipflops.Dffr

All Implemented Interfaces:

Assignable, java.lang.Cloneable, ContextToolTip, java.io.Serializable, Simulatable

public class Dffr

extends GenericFlipflop

implements Simulatable, java.io.Serializable

Dffr: a rising-edge triggered D-flipflop with asynchronous clear. Signals are expected to be StdLogic1164 objects.

See Also:

Serialized Form

Field Summary

Fields inherited from class hades.models.flipflops.GenericFlipflop

port_NQ, port_Q, t_hold, t_pass, t_setup

Fields inherited from class hades.simulator.SimObject

classloader, console, debug, editor, name, parent, ports, propertySheet, simulator, symbol, versionId, visible

Constructor Summary

Dffr()

Method Summary

void	evaluate(java.lang.Object arg) evaluate: check the C, D, and NR inputs and calculate Q and NQ outputs.

Methods inherited from class hades.models.flipflops.GenericFlipflop

assign, configure, elaborate, getDelay, getHoldTime, getSetupTime, getToolTip, initialize, scheduleEvent, scheduleEventAfter, scheduleOutputValue, scheduleOutputValueAfter, setDelay, setDelay, setHoldTime, setHoldTime, setSetupTime, setSetupTime, write

Methods inherited from class hades.simulator.SimObject

constructDynamicSymbol, copy, getBindkey, getClassLoader, getDebug, getEditor, getExternalResources, getFullName, getName, getParent, getPort, getPorts, getPropertySheet, getResourceAsStream, getSimulator, getSymbol, getSymbolResourceName, getVersionId, isVisible, keyPressed, message, mousePressed, needsDynamicSymbol, needsExternalResources, setClassLoader, setConsole, setDebug, setEditor, setName, setParent, setPorts, setSimulator, setSymbol, setVersionId, setVisible, tearDown, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface hades.simulator.Simulatable

elaborate, message

Constructor Detail

Dffr

public Dffr()

Method Detail

evaluate

public void evaluate(java.lang.Object arg)

evaluate: check the C, D, and NR inputs and calculate Q and NQ outputs. If NR is high (inactive) and C has a rising edge, propagate D to Q. If NR is low, reset the flipflop. If any input is undefined or a timing-violation is detected, set the flipflop state and outputs 'X'.

Specified by:

evaluate in interface Simulatable

Overrides:

evaluate in class SimObject

Parameters:

arg - an arbitrary object argument