CPLD Schematic Design Guide
viii
Xilinx Development System
·
Emphasis in text
If a wire is drawn so that it overlaps the pin of a symbol, the
two nets are not connected.
·
Square brackets "[ ]" indicate an optional entry or parameter.
However, in bus specifications, such as bus [7:0], they are
required.
edif2ngd
[option_name] design_name
·
Braces "{ }" enclose a list of items from which you must choose
one or more.
lowpwr =
{
on
|
off
}
·
A vertical bar "|" separates items in a list of choices.
lowpwr =
{
on
|
off
}
·
A vertical ellipsis indicates repetitive material that has been
omitted.
IOB #1: Name = QOUT'
IOB #2: Name = CLKIN'
.
.
.
·
A horizontal ellipsis ". . ." indicates that an item can be repeated
one or more times.
allow block
block_name loc1 loc2
...
locn;
Online Document
The following conventions are used for online documents.
·
Red-underlined text indicates an interbook link, which is a cross-
reference to another book. Click the red-underlined text to open
the specified cross-reference.
·
Blue-underlined text indicates an intrabook link, which is a cross-
reference within a book. Click the blue-underlined text to open
the specified cross-reference.
Summary :
CPLD Schematic Design Guide viii Xilinx Development System · Emphasis in text If a wire is drawn so that it overlaps the pin of a symbol, the two nets are not connected.
Tags :
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