Specifications

Embedded System Tools Guide (EDK 6.2i) www.xilinx.com 247
UG111 (v1.4) January 30, 2004 1-800-255-7778
Parameter
R
BUS
The bus interface of an parameter is specified by the BUS keyword.
Format
PARAMETER C_OPB_AWIDTH = 32, DT=datatype, 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.
CACHEABLE
The CACHECABLE keyword identifies a cacheable address.
Format
PARAMETER C_BASEADDR=0xFFFFFFFF, CACHEABLE=TRUE
DESC
Allows a short description of the parameter to be displayed by the GUI tools. The short
description replaces the parameter name in display field.
Format
PARAMETER C_HAS_EXTERNAL_XIN=0, DT=integer, DESC="HAS XIN"
DT
The data type of a parameter is specified by the DT keyword.
Format
PARAMETER C_OPB_AWIDTH = 32, DT=datatype, BUS=bus_label
Where datatype can have the values in the following table:. The VHDL type and Verilog
type columns describe how the DT value will be translated in the appropriate language.
GUI_PERMIT
The GUI_PERMIT keyword defines GUI usage level of a parameter. Currently,
unsupported.
Format
PARAMETER C_HAS_EXTERNAL_XIN=0, DT=integer, GUI_PERMIT=ALL_USERS
Table 16-14: DT Values
DT Value VHDL type Verilog type
integer integer integer
string string string
std_logic std_logic bit
std_logic_vector std_logic_vector bit vector