User manual

12 www.xilinx.com SPI-4.2 v8.5 Getting Started Guide
UG154 March 24, 2008
Preface: About This Guide
R
Typographical
The following typographical conventions are used in this document:
Online Document
The following 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
Italic font
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;
Convention Meaning or Use Example
Blue text
Cross-reference link to a
location in the current
document
See the section “Additional
Resources” for details.
Refer to “Title Formats” in
Chapter 1 for details.
Blue, underlined text
Hyperlink to a website (URL)
Go to w
ww.xilinx.com for the
latest speed files.