Specifications

Embedded System Tools Guide (EDK 6.2i) www.xilinx.com 251
UG111 (v1.4) January 30, 2004 1-800-255-7778
Port
R
3STATE
The 3STATE keyword enables/disables tri-state expansion. Its use is deprecated. Please
use the THREE_STATE keyword.
Format
PORT PAR = “”, DIR=INOUT, 3STATE=FALSE, IOB_STATE=BUF
For output ports, the default value is FALSE. For inout ports, the default value is TRUE.
Please see the “3-state (InOut) Signals” section about designing tri-state signals at the HDL
level.
ASSIGNMENT
The ASSIGNMENT keyword defines assignment usage level.
Format
PORT OPB_Clk=””, DT=integer, ASSIGNMENT=REQUIRE
LEVEL HIGH
LOW
No Default Interrupt level sensitivity (deprecated)
LONG_DESC string No Default Allow a long description of the port to
be displayed by the GUI tools
SENSITIVITY EDGE_FALLING
EDGE_RISING
LEVEL_HIGH
LEVEL_LOW
No Default Interrupt sensitivity
SIGIS CLK
INTERRUPT
RST
No Default Signal classification
THREE_STATE TRUE
FALSE
No Default Tri-state expansion
VEC [A:B] No Default Vector dimension. Where A and B are
positive integer expressions.
Table 16-16: Port Keywords
Keyword Values Default Definition