12
Video Input/Output Daughter Card
UG235 (v1.2.1) October 31, 2007
Preface:
About This Guide
R
Conventions
This document uses the following conventions. An example illustrates each convention.
Typographical
The following typographical conventions are used in this document:
Convention
Meaning or Use
Example
Courier font
Messages, prompts, and
program files that the system
displays
speed grade: - 100
Courier bold
Literal commands that you
enter in a syntactical statement
ngdbuild
design_name
Helvetica bold
Commands that you select
from a menu
File
→
Open
Keyboard shortcuts
Ctrl+C
Italic font
Variables in a syntax
statement for which you must
supply values
ngdbuild
design_name
References to other manuals
See the
Development System
Reference Guide
for more
information.
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 [ ]
An optional entry or
parameter. However, in bus
specifications, such as
bus[7:0]
, they are required.
ngdbuild
[
option_name
]
design_name
Braces { }
A list of items from which you
must choose one or more
lowpwr =
{
on
|
off
}
Vertical bar |
Separates items in a list of
choices
lowpwr =
{
on
|
off
}
Vertical ellipsis
.
.
.
Repetitive material that has
been omitted
IOB #1: Name = QOUT’
IOB #2: Name = CLKIN’
.
.
.
Horizontal ellipsis
. . .
Repetitive material that has
been omitted
allow block
block_name
loc1 loc2 ... locn;
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