Specifications

252 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
The following table lists ASSIGNMENT values:
BUS
Bus interface association name.
Format
PORT OPB_seqAddr = OPB_seqAddr, DIR=IN, BUS=bus_label
Where bus_label is a string.
If you have more than bus interface is sharing the parameter, then use the colon (:) to
separate each bus interface in the list. The first item in the list is the default setting.
Format
PORT OPB_seqAddr = OPB_seqAddr, DIR=IN, BUS=MSOPB:SOPB
DESC
Allows a short description of the port to be displayed by the GUI tools. The short
description replaces the port name in display field.
Format
PORT OPB_Clk=””, DIR=IN, SIGIS=CLK, BUS=SOPB, DESC="OPB clock"
DIR
The driver direction of a signal is specified by the DIR keyword.
Format
PORT mysignal = “”, DIR=direction
Where direction is either INPUT, IN, I, OUTPUT, OUT, O, INOUT, or IO.
EDGE
The edge sensitivity of an interrupt signal is specified by the EDGE keyword. Its use is
deprecated. Please use the SENSITIVITY keyword.
Format
PORT interrupt = “”, DIR=O, EDGE=edge_value, SIGIS=INTERRUPT
Table 16-17: ASSIGNMENT Values
ASSIGNMENT Definition
CONSTANT The value is a constant. User and the EDK batch tools are not
allowed to modify the value.
OPTIONAL If user does not specify a value, the EDK batch tools will use the
default
REQUIRE User must specify a value
UPDATE User is not allowed to specify a value and the EDK batch tools
will compute the value