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java.lang.Objectbyucc.jhdl.base.Nameable
byucc.jhdl.base.Node
byucc.jhdl.base.Cell
byucc.jhdl.base.Structural
byucc.jhdl.Logic.LogicGates
byucc.jhdl.Logic.LogicStatic
byucc.jhdl.Logic.Logic
byucc.jhdl.Xilinx.XilinxLatch
byucc.jhdl.Xilinx.XC4000.ldce
LDCE is a transparent data latch with asynchronous clear and gate enable. When the asynchronous clear input (CLR) is High, it overrides the other inputs and resets the data (Q) output Low. Q reflects the data (D) input while the gate (G) input and gate enable (GE) are High and CLR is Low. If GE is Low, data on D cannot be latched. The data on the D input during the High-to-Low gate transition is stored in the latch. The data on the Q output remains unchanged as long as G or GE remains low. The latch is asynchronously cleared with Low output when power is applied. FPGAs simulate power-on when global reset (GR) or global set/reset (GSR) is active. GR (XC5200) and GSR (XC4000, Spartans, Virtex) default to active-High but can be inverted by adding an inverter in front of the GR/GSR input of the STARTUP, STARTUP_SPARTAN2, or STARTUP_VIRTEX symbol. (Source: XACT Libraries Guide, Chapter 7 LDCE, Xilinx Corporation, 1999.)
| Field Summary | |
static CellInterface[] |
cell_interface
The port interface for: ldce clr : in (1) ge : in (1) g : implicit (1) d : in (1) q : out (1) |
static java.lang.String |
cellname
The static cellname (netlist reference name) for ldce |
| Fields inherited from class byucc.jhdl.Xilinx.XilinxLatch |
implicit_interface |
| Fields inherited from class byucc.jhdl.Logic.Logic |
ABOVE, ALIGN_BOTTOM, ALIGN_CENTER, ALIGN_LEFT, ALIGN_LSB, ALIGN_MSB, ALIGN_RIGHT, ALIGN_TOP, BELOW, DOWN, EAST_OF, LEFT_OF, MAX_PACK, NORTH_OF, ON, ONTOP, ONTOP_OF, RIGHT_OF, SOUTH_OF, TOLEFT, TORIGHT, UNCONSTRAINED, UP, WEST_OF |
| Fields inherited from class byucc.jhdl.Logic.LogicGates |
tech_mapper |
| Fields inherited from class byucc.jhdl.base.Cell |
BOOLEAN, CELL_NAME_DECLARATION, CellInterfaceDeterminesUniqueNetlistStructure, DETERMINE_FROM_STRING, GENERICS_DECLARATION, 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 |
| Constructor Summary | |
protected |
ldce(Node parent)
Used only by child classes to pass up the parent cell. |
|
ldce(Node parent,
ArgBlockList abl)
Constructs a new ldce, connecting its ports as given by the String-Wire pairs in the ArgBlockList. |
protected |
ldce(Node parent,
java.lang.String name)
Used only by child classes to pass up the parent cell and instance name. |
|
ldce(Node parent,
java.lang.String instanceName,
ArgBlockList abl)
Constructs a new ldce, connecting its ports as given by the String-Wire pairs in the ArgBlockList. |
|
ldce(Node parent,
java.lang.String instanceName,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3)
Constructs a new ldce, connecting each Wire to the port whose name is given by the accompanying String parameter
The initial String parameter specifies the instance name. |
|
ldce(Node parent,
java.lang.String instanceName,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3,
java.lang.String s4,
Wire w4)
Constructs a new ldce, connecting each Wire to the port whose name is given by the accompanying String parameter
Note: this includes enough wires for the implicit ports. |
|
ldce(Node parent,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3)
Constructs a new ldce, connecting each Wire to the port whose name is given by the accompanying String parameter |
|
ldce(Node parent,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3,
java.lang.String s4,
Wire w4)
Constructs a new ldce, connecting each Wire to the port whose name is given by the accompanying String parameter
Note: this includes enough wires for the implicit ports. |
|
ldce(Node parent,
java.lang.String instanceName,
Wire clr,
Wire ge,
Wire d,
Wire q)
Constructs a new ldce. |
|
ldce(Node parent,
java.lang.String instanceName,
Wire clr,
Wire ge,
Wire g,
Wire d,
Wire q)
Constructs a new ldce. |
|
ldce(Node parent,
Wire clr,
Wire ge,
Wire d,
Wire q)
Constructs a new ldce. |
|
ldce(Node parent,
Wire clr,
Wire ge,
Wire g,
Wire d,
Wire q)
Constructs a new ldce. |
| 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. |
void |
clock()
Users define synchronous behavior in this method using standard JHDL constructs. |
java.lang.String |
getCellName()
Access the cell name associated with a derived class. |
static void |
main(java.lang.String[] argv)
|
void |
propagate()
Users defined propagatable behavior using standard JHDL constructs. |
void |
reset()
If you define a behavior, you must also define a reset method for resetting the synchonous part of your model. |
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.Xilinx.XilinxLatch |
connectImplicitPorts, needsToBeAsynchronouslyScheduled |
| Methods inherited from class byucc.jhdl.base.Node |
addObservable, addSimulatorCallback, checkAll, delete, getBuildingFlag, getChildren, getChildrenEnumeration, 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 |
public static final java.lang.String cellname
public static CellInterface[] cell_interface
| Constructor Detail |
protected ldce(Node parent)
parent - Parent cell
protected ldce(Node parent,
java.lang.String name)
parent - Parent cellname - Instance name of the cell
public ldce(Node parent,
Wire clr,
Wire ge,
Wire d,
Wire q)
parent - The parent Cell to the ldceclr - The Wire to be connected to input port clrge - The Wire to be connected to input port ged - The Wire to be connected to input port dq - The Wire to be connected to output port q
public ldce(Node parent,
java.lang.String instanceName,
Wire clr,
Wire ge,
Wire d,
Wire q)
String parameter specifies the instance name.
parent - The parent Cell to the ldceinstanceName - The instance name of the ldceclr - The Wire to be connected to input port clrge - The Wire to be connected to input port ged - The Wire to be connected to input port dq - The Wire to be connected to output port q
public ldce(Node parent,
Wire clr,
Wire ge,
Wire g,
Wire d,
Wire q)
parent - The parent Cell to the ldceclr - The Wire to be connected to input port clrge - The Wire to be connected to input port geg - The Wire to be connected to implicit port gd - The Wire to be connected to input port dq - The Wire to be connected to output port q
public ldce(Node parent,
java.lang.String instanceName,
Wire clr,
Wire ge,
Wire g,
Wire d,
Wire q)
String parameter specifies the instance name.
parent - The parent Cell to the ldceinstanceName - The instance name of the ldceclr - The Wire to be connected to input port clrge - The Wire to be connected to input port geg - The Wire to be connected to implicit port gd - The Wire to be connected to input port dq - The Wire to be connected to output port q
public ldce(Node parent,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3)
Wire to the port whose name is given by the accompanying String parameter
parent - The parent Cell to the ldces0 - The name of the port to which w0 will be connectedw0 - The Wire to be connected to the port specified by s0s1 - The name of the port to which w1 will be connectedw1 - The Wire to be connected to the port specified by s1s2 - The name of the port to which w2 will be connectedw2 - The Wire to be connected to the port specified by s2s3 - The name of the port to which w3 will be connectedw3 - The Wire to be connected to the port specified by s3
public ldce(Node parent,
java.lang.String instanceName,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3)
Wire to the port whose name is given by the accompanying String parameter
The initial String parameter specifies the instance name.
parent - The parent Cell to the ldceinstanceName - The instance name of the ldces0 - The name of the port to which w0 will be connectedw0 - The Wire to be connected to the port specified by s0s1 - The name of the port to which w1 will be connectedw1 - The Wire to be connected to the port specified by s1s2 - The name of the port to which w2 will be connectedw2 - The Wire to be connected to the port specified by s2s3 - The name of the port to which w3 will be connectedw3 - The Wire to be connected to the port specified by s3
public ldce(Node parent,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3,
java.lang.String s4,
Wire w4)
Wire to the port whose name is given by the accompanying String parameter
Note: this includes enough wires for the implicit ports.
parent - The parent Cell to the ldces0 - The name of the port to which w0 will be connectedw0 - The Wire to be connected to the port specified by s0s1 - The name of the port to which w1 will be connectedw1 - The Wire to be connected to the port specified by s1s2 - The name of the port to which w2 will be connectedw2 - The Wire to be connected to the port specified by s2s3 - The name of the port to which w3 will be connectedw3 - The Wire to be connected to the port specified by s3s4 - The name of the port to which w4 will be connectedw4 - The Wire to be connected to the port specified by s4
public ldce(Node parent,
java.lang.String instanceName,
java.lang.String s0,
Wire w0,
java.lang.String s1,
Wire w1,
java.lang.String s2,
Wire w2,
java.lang.String s3,
Wire w3,
java.lang.String s4,
Wire w4)
Wire to the port whose name is given by the accompanying String parameter
Note: this includes enough wires for the implicit ports.
The initial String parameter specifies the instance name.
parent - The parent Cell to the ldceinstanceName - The instance name of the ldces0 - The name of the port to which w0 will be connectedw0 - The Wire to be connected to the port specified by s0s1 - The name of the port to which w1 will be connectedw1 - The Wire to be connected to the port specified by s1s2 - The name of the port to which w2 will be connectedw2 - The Wire to be connected to the port specified by s2s3 - The name of the port to which w3 will be connectedw3 - The Wire to be connected to the port specified by s3s4 - The name of the port to which w4 will be connectedw4 - The Wire to be connected to the port specified by s4
public ldce(Node parent,
ArgBlockList abl)
String-Wire pairs in the ArgBlockList. Any generic assignments are made through String-String pairs in the ArgBlockList.
parent - The parent Cell to the ldceabl - The list of String-Wire pairs for port assignments, and String-String pairs for generic assignments.
public ldce(Node parent,
java.lang.String instanceName,
ArgBlockList abl)
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.
parent - The parent Cell to the ldceinstanceName - The instance name of the ldceabl - The list of String-Wire pairs for port assignments, and String-String pairs for generic assignments.| Method Detail |
public java.lang.String getCellName()
Cell
getCellName in class Cellpublic final void clock()
Structural
clock in interface Clockableclock in class Structuralpublic void reset()
Structural
reset in interface Clockablereset in class Structuralpublic final void propagate()
Structural
propagate in interface byucc.jhdl.base.Propagateablepropagate in class Structuralpublic final boolean cellInterfaceDeterminesUniqueNetlistStructure()
Cell
cellInterfaceDeterminesUniqueNetlistStructure in class Cellpublic int type()
PreDefinedSchematic
type in interface PreDefinedSchematicpublic static void main(java.lang.String[] argv)
public static void test()
|
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