byucc.jhdl.Xilinx.XC4000
Class pulldown

java.lang.Object
  byucc.jhdl.base.Nameable
      byucc.jhdl.base.Node
          byucc.jhdl.base.Cell
              byucc.jhdl.base.CL
                  byucc.jhdl.base.PullUpDown
                      byucc.jhdl.Xilinx.XC4000.pulldown

All Implemented Interfaces:

BooleanFlags, PreDefinedSchematic, byucc.jhdl.base.Propagateable, TreeListable, UnmappableCell

public final class pulldown

extends PullUpDown

implements UnmappableCell, PreDefinedSchematic

PULLDOWN resistor elements are available in each XC4000 Input/Output Block (IOB). They are connected to input, output, or bidirectional pads to guarantee a logic Low level for nodes that might float.

Field Summary

static CellInterface[]	cell_interface The port interface for: pulldown o : out (1)
static java.lang.String	cellname The static cellname (netlist reference name) for pulldown

Fields inherited from class byucc.jhdl.base.Cell

BOOLEAN, CELL_NAME_DECLARATION, CellInterfaceDeterminesUniqueNetlistStructure, DETERMINE_FROM_STRING, GENERICS_DECLARATION, implicit_interface, IMPLICIT_INTERFACE_DECLARATION, INTEGER, INTERFACE_DECLARATION, LONG, PORT_IOS_DECLARATION, PORT_NAMES_DECLARATION, PORT_NET_NAMES_DECLARATION, PORT_PROPERTIES, PORT_WIDTHS_DECLARATION, SIGN_EXT, STRING, ZERO_PAD

Fields inherited from interface byucc.jhdl.apps.Viewers.Schematic.PreDefinedSchematic

PreDefinedSchematic_ADD, PreDefinedSchematic_ADDSUB, PreDefinedSchematic_AND, PreDefinedSchematic_BUF, PreDefinedSchematic_CONST, PreDefinedSchematic_GEN, PreDefinedSchematic_GND, PreDefinedSchematic_INC, PreDefinedSchematic_INV, PreDefinedSchematic_MUX, PreDefinedSchematic_NAND, PreDefinedSchematic_NOR, PreDefinedSchematic_OR, PreDefinedSchematic_PULLDOWN, PreDefinedSchematic_PULLUP, PreDefinedSchematic_REG, PreDefinedSchematic_SHL, PreDefinedSchematic_SHR, PreDefinedSchematic_TBUF, PreDefinedSchematic_VCC, PreDefinedSchematic_XNOR, PreDefinedSchematic_XOR

Fields inherited from interface byucc.jhdl.base.BooleanFlags

ANTECEDANT_IS_BEHAVIORALLY_MODELED, ASYNC_PORT, ASYNCHRONOUS_RESOLVED, ATOMICALLY_PLACEABLE, ATOMICALLY_UNMAPPABLE, BEHAVIORALLY_MODELED_BRANCH, CLK_PORT, CLOCK_METHOD_IMPLEMENTED_BY_USER, CLOCK_METHOD_IS_DISABLED, CLOCKABLE_IS_SCHEDULED, DANGLING_IS_OK, DELETE_MARK, FATAL_BUILD_ERROR_OCCURED, HAS_BEEN_TRACED, HAS_USER_SPECIFIED_NAME, HWUPDATE, IMPLICIT_PORT, IN_CLK_PORT, IN_PORT, INOUT_PORT, IO_TYPE_FLAGS, IS_BEHAVIORALLY_MODELED, IS_ON_BUILD_STACK, IS_ON_PROP_LIST, IS_PLACED, METHODS_IMPLEMENTED_BY_USER, NETLISTABLE, ORIG_WIRE_IS_ATOMIC, OUT_PORT, PLACEMENT_IS_LOCKED, PROPAGATE_METHOD_IMPLEMENTED_BY_USER, PROPAGATE_METHOD_IS_DISABLED, RECURSION_FLAG, RESET_METHOD_IMPLEMENTED_BY_USER, SIMULATEABLE, SOURCELESS_IS_OK, SYNC_PORT, VISIBLE

Constructor Summary

protected	pulldown(Node parent) Used only by child classes to pass up the parent cell.
	pulldown(Node parent, ArgBlockList abl) Constructs a new pulldown, connecting its ports as given by the String-Wire pairs in the ArgBlockList.
protected	pulldown(Node parent, java.lang.String name) Used only by child classes to pass up the parent cell and instance name.
	pulldown(Node parent, java.lang.String instanceName, ArgBlockList abl) Constructs a new pulldown, connecting its ports as given by the String-Wire pairs in the ArgBlockList.
	pulldown(Node parent, java.lang.String instanceName, java.lang.String s0, Wire w0) Constructs a new pulldown, connecting each Wire to the port whose name is given by the accompanying String parameter The initial String parameter specifies the instance name.
	pulldown(Node parent, java.lang.String instanceName, Wire o) Constructs a new pulldown.
	pulldown(Node parent, Wire o) Constructs a new pulldown.

Method Summary

boolean	cellInterfaceDeterminesUniqueNetlistStructure() When false, the default behavior of this method, each cell will list itself separately in a netlist, guaranteeing that the netlist will not have invalid data at the expense of a larger file-size.
java.lang.String	getCellName() Access the cell name associated with a derived class.
int	getOutputValue() Must be defined to be an integer value by the user.
static void	main(java.lang.String[] argv)
static void	test()
int	type() This method returns one of the predefined schematic constants to identify the type of this cell.

Methods inherited from class byucc.jhdl.base.PullUpDown

connect, connectAllWires, isReadyToBeAsynchronouslyScheduled, propagate

Methods inherited from class byucc.jhdl.base.CL

behavioralModelIsAvailable, defaultSimulationModelIsBehavioral, hasBeenTraced, hasBeenTraced, hasBehaviorInClockMethod, hasBehaviorInPropagateMethod, isAsynchronouslyScheduled, isAsynchronouslyScheduled, needsToBeAsynchronouslyScheduled

Methods inherited from class byucc.jhdl.base.Cell

addPort, addPorts, addProperties, addProperties, addProperty, addProperty, addProperty, addProperty, antecedantIsBehaviorallyModeled, antecedantIsBehaviorallyModeled, bind, bind, bind, bind, clk, connectOptional, constructSubCell, constructSubCellNoImplicitPorts, disableAllBehavioralModels, disableBehavioralModel, enableBehavioralModel, getArgument, getAttachedPort, getAttachedWire, getAttachedWireNoException, getCellNetlist, getCellNetList, getCellNetlist, getCellNetlist, getDescendents, getFlatNetlist, getFlatNetlistableChildren, getGeneric, getHeight, getNetlistableChildren, getPlacementInfo, getPortProperties, getPortRecord, getPortRecords, getProperties, getProperty, getPropertyValue, getSinkWires, getSourceWires, getSubCellClass, getUniqueCellName, getWidth, getX, getY, hasPort, hasPorts, in, in, inout, inout, isAsynchronousSourceSinkResolved, isBehaviorallyModeled, isBehaviorallyModeledBranch, isInput, isLeafCell, isNetlistable, isNetlistable, isNetlistablePort, isNetlistLeaf, isNotNetlistable, isNotNetlistablePort, isNotVisible, isOutput, isPlaceable, isPlaceable, isPlaced, isPlaced, isPlacementLocked, isRoot, isSimulateable, isSimulateable, isSink, isSource, isVisible, isVisible, join, lockPlacement, nc, out, out, param, popHierarchy, port, port, port, postorderCheck, preorderCheck, pushHierarchy, pushHierarchy, pushHierarchy, pushHierarchy, pushHierarchyNoImplicitPorts, pushHierarchyNoImplicitPorts, removeAllUnconnectedPorts, removePort, removeProperty, replaceProperty, replaceProperty, resetBehavioralModelsToDefaults, setAsynchronousSourceSinkResolved, setGeneric, setHeight, setNotNetlistable, setNotNetlistable, setNotVisible, setNotVisible, setPlacementInfo, setPortNotNetlistable, setPortNotNetlistable, setProperty, setWidth, subClassDelete, toString, uniquifyCell, userDefinedClockCount, verifyAndCleanup

Methods inherited from class byucc.jhdl.base.Node

addObservable, addSimulatorCallback, checkAll, delete, getBuildingFlag, getChildren, getChildrenEnumeration, getDefaultClock, getInstanceName, getParent, getParentCell, getRelatives, getSystem, getWires, optimize, orphanAllowed, printAllChildren, printTree, removeSimulatorCallback, setDefaultClock

Methods inherited from class byucc.jhdl.base.Nameable

caseSensitivity, caseSensitivity, disableNameClashChecking, getFullName, getFullNameNoTestBench, getHierNameNoTestBench, getInstanceNo, getInstanceNumber, getLeafName, getLeafName, getRelativeName, getUserName, getUserName, hasUserSpecifiedName, isDescendantOf, setInstanceNumber

Methods inherited from class java.lang.Object

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

Field Detail

cellname

public static final java.lang.String cellname

The static cellname (netlist reference name) for pulldown

See Also:

Constant Field Values

cell_interface

public static CellInterface[] cell_interface

The port interface for: pulldown o : out (1)

Constructor Detail

pulldown

protected pulldown(Node parent)

Used only by child classes to pass up the parent cell.

Parameters:

parent - Parent cell

pulldown

protected pulldown(Node parent,
                   java.lang.String name)

Used only by child classes to pass up the parent cell and instance name.

Parameters:

parent - Parent cell

name - Instance name of the cell

pulldown

public pulldown(Node parent,
                Wire o)

Constructs a new pulldown.

Parameters:

parent - The parent Cell to the pulldown

o - The Wire to be connected to output port o

pulldown

public pulldown(Node parent,
                java.lang.String instanceName,
                Wire o)

Constructs a new pulldown. The initial String parameter specifies the instance name.

Parameters:

parent - The parent Cell to the pulldown

instanceName - The instance name of the pulldown

o - The Wire to be connected to output port o

pulldown

public pulldown(Node parent,
                java.lang.String instanceName,
                java.lang.String s0,
                Wire w0)

Constructs a new pulldown, connecting each Wire to the port whose name is given by the accompanying String parameter The initial String parameter specifies the instance name.

Parameters:

parent - The parent Cell to the pulldown

instanceName - The instance name of the pulldown

s0 - The name of the port to which w0 will be connected

w0 - The Wire to be connected to the port specified by s0

pulldown

public pulldown(Node parent,
                ArgBlockList abl)

Constructs a new pulldown, connecting its ports as given by the String-Wire pairs in the ArgBlockList. Any generic assignments are made through String-String pairs in the ArgBlockList.

Parameters:

parent - The parent Cell to the pulldown

abl - The list of String-Wire pairs for port assignments, and String-String pairs for generic assignments.

pulldown

public pulldown(Node parent,
                java.lang.String instanceName,
                ArgBlockList abl)

Constructs a new pulldown, connecting its ports as given by the String-Wire pairs in the ArgBlockList. Any generic assignments are made through String-String pairs in the ArgBlockList. The initial String parameter is the instance name.

Parameters:

parent - The parent Cell to the pulldown

instanceName - The instance name of the pulldown

abl - The list of String-Wire pairs for port assignments, and String-String pairs for generic assignments.

Method Detail

getCellName

public java.lang.String getCellName()

Description copied from class: Cell

Access the cell name associated with a derived class. The cellname field is lazily evaluated on the first call of this method. Can be overriden to make cellname different by instance. If the field does not exist, this defaults to the classname.

Overrides:

getCellName in class Cell

Returns:

the cell name associated with a derived class, null if not declared.

cellInterfaceDeterminesUniqueNetlistStructure

public final boolean cellInterfaceDeterminesUniqueNetlistStructure()

Description copied from class: Cell

When false, the default behavior of this method, each cell will list itself separately in a netlist, guaranteeing that the netlist will not have invalid data at the expense of a larger file-size. Overriding this method to return true allows JHDL to save memory and netlists to be smaller by sharing the netlist structures that are guaranteed to be identical. NOTE: Do not override this unless every possible condition responsible for structural differences in a class (types and amount of children cells created, and arrangements of wires connected to ports) is included in the cellInterface[] of that class.

Overrides:

cellInterfaceDeterminesUniqueNetlistStructure in class Cell

Returns:

false if not overridden, preventing all memory sharing

getOutputValue

public int getOutputValue()

Description copied from class: PullUpDown

Must be defined to be an integer value by the user.

Specified by:

getOutputValue in class PullUpDown

Returns:

the value that will be placed on the PullUp/Down's output wire.

type

public int type()

Description copied from interface: PreDefinedSchematic

This method returns one of the predefined schematic constants to identify the type of this cell.

Specified by:

type in interface PreDefinedSchematic

Returns:

A predefined schematic constant

main

public static void main(java.lang.String[] argv)

test

public static void test()