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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.XilinxCL
byucc.jhdl.Xilinx.Virtex2.iobuf_s_4
IOBUF and its variants (listed below) are bi-directional buffers whose I/O interface corresponds to a specific I/O standard.The name extensions (LVCMOS2, PCI33_3, PCI33_5, etc.) specify the standard. The S, F, and 2, 4, 6, 8, 12, 16, 24 extensions specify the slew rate (SLOW or FAST) and the drive power (2, 4, 6, 8, 12, 16, 24 mA) for the LVTTL standard variants. For example, IOBUF_F_2 is a bi-directional buffer that uses the LVTTL I/O-signaling standard with a FAST slew and 2mA of drive power. IOBUF (LVTTL) has selectable drive and slew rates using the DRIVE and FAST or SLOW constraints. The defaults are DRIVE=12 mA and SLOW slew. IOBUFs are composites of IBUF and OBUFT elements. The O output is X (unknown) when IO (input/output) is Z. IOBUFs can be implemented as interconnections of their component elements. (Source: XACT Libraries Guide, Chapter 6 IOBUF_selectIO, Xilinx Corporation, 1999.)
| Field Summary | |
static CellInterface[] |
cell_interface
The port interface for: iobuf_s_4 i : in (1) t : in (1) o : out (1) io : inout (1) |
static java.lang.String |
cellname
The static cellname (netlist reference name) for iobuf_s_4 |
| Fields inherited from class byucc.jhdl.Xilinx.XilinxCL |
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 |
iobuf_s_4(Node parent)
Used only by child classes to pass up the parent cell. |
|
iobuf_s_4(Node parent,
ArgBlockList abl)
Constructs a new iobuf_s_4, connecting its ports as given by the String-Wire pairs in the ArgBlockList. |
protected |
iobuf_s_4(Node parent,
java.lang.String name)
Used only by child classes to pass up the parent cell and instance name. |
|
iobuf_s_4(Node parent,
java.lang.String instanceName,
ArgBlockList abl)
Constructs a new iobuf_s_4, connecting its ports as given by the String-Wire pairs in the ArgBlockList. |
|
iobuf_s_4(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 iobuf_s_4, connecting each Wire to the port whose name is given by the accompanying String parameter
The initial String parameter specifies the instance name. |
|
iobuf_s_4(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 iobuf_s_4, connecting each Wire to the port whose name is given by the accompanying String parameter |
|
iobuf_s_4(Node parent,
java.lang.String instanceName,
Wire i,
Wire t,
Wire o,
Wire io)
Constructs a new iobuf_s_4. |
|
iobuf_s_4(Node parent,
Wire i,
Wire t,
Wire o,
Wire io)
Constructs a new iobuf_s_4. |
| 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. |
boolean |
isDrivingOutput()
Must be implemented to state whether the cell is driving the tri-state output, based on the enable input. |
boolean |
isNetlistLeaf()
A few rare cells are leafCells during netlisting, but not during simulation. |
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.Xilinx.XilinxCL |
connectImplicitPorts |
| 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 iobuf_s_4(Node parent)
parent - Parent cell
protected iobuf_s_4(Node parent,
java.lang.String name)
parent - Parent cellname - Instance name of the cell
public iobuf_s_4(Node parent,
Wire i,
Wire t,
Wire o,
Wire io)
parent - The parent Cell to the iobuf_s_4i - The Wire to be connected to input port it - The Wire to be connected to input port to - The Wire to be connected to output port oio - The Wire to be connected to bidirectional port io
public iobuf_s_4(Node parent,
java.lang.String instanceName,
Wire i,
Wire t,
Wire o,
Wire io)
String parameter specifies the instance name.
parent - The parent Cell to the iobuf_s_4instanceName - The instance name of the iobuf_s_4i - The Wire to be connected to input port it - The Wire to be connected to input port to - The Wire to be connected to output port oio - The Wire to be connected to bidirectional port io
public iobuf_s_4(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 iobuf_s_4s0 - 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 iobuf_s_4(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 iobuf_s_4instanceName - The instance name of the iobuf_s_4s0 - 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 iobuf_s_4(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 iobuf_s_4abl - The list of String-Wire pairs for port assignments, and String-String pairs for generic assignments.
public iobuf_s_4(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 iobuf_s_4instanceName - The instance name of the iobuf_s_4abl - 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 boolean isDrivingOutput()
TriStateDriver
isDrivingOutput in interface TriStateDriverpublic boolean isNetlistLeaf()
Cell
isNetlistLeaf in class Cellpublic 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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