Specifications

250 www.xilinx.com Embedded System Tools Guide (EDK 6.2i)
1-800-255-7778 UG111 (v1.4) January 30, 2004
Chapter 16: Microprocessor Peripheral Description (MPD)
R
Port Keywords
A port can have the following keywords:
Table 16-16: Port Keywords
Keyword Values Default Definition
3STATE TRUE
FALSE
No Default Tri-state expansion (deprecated)
ASSIGNMENT CONSTANT
OPTIONAL
REQUIRE
UPDATE
OPTIONAL Defines assignment usage level
BUS string No Default Bus label
DESC string No Default Allow a short description of the port to
be displayed by the GUI tools
DIR IN, INPUT, I
OUT, OUTPUT, O
INOUT, IO
ODirection mode
EDGE RISING
FALLING
No Default Interrupt edge sensitivity (deprecated)
ENABLE MULTI
SINGLE
SINGLE 3-state enable control
ENDIAN BIG
LITTLE
BIG Endianess
GUI_PERMIT ADVANCED_USER
ALL_USERS
DISPLAYONLY
NONE
ALL_USERS Defines GUI usage level. Currently,
unsupported.
INTERRUPT_PRIORITY HIGH
LOW
MEDIUM
LOW Defines the relative priority of
interrupt signals
INITIALVAL VCC
GND
GND Driver value on unconnected inputs
IOB_STATE BUF
INFER
REG
INFER Identifies ports that instantiate or infer
IOB primitives
IO_IF string No Default IO label
IO_IS string No Default