hades.models.flipflops
Class Latchr

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

All Implemented Interfaces:

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

public class Latchr

extends GenericFlipflop

implements Simulatable, java.io.Serializable

Latchr: a level-sensitive D-latch 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

Latchr()

Method Summary

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

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

Latchr

public Latchr()

Method Detail

evaluate

public void evaluate(java.lang.Object arg)

evaluate: check the NR, C, D inputs and calculate Q and NQ. If NR is low (active) reset the latch, otherwise check for C and propagate the D input to Q is C is high. If either input is undefined or a timing-violation is detected, set the latch state and the Q/NQ outputs to 'X'.

Specified by:

evaluate in interface Simulatable

Overrides:

evaluate in class SimObject

Parameters:

arg - an arbitrary object argument