
R
Preface: About This Guide
Conventions
Typographical
The following typographical conventions are used in this document:
| Convention | Meaning or Use | Example | |
| 
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 | 
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| 
 | Messages, prompts, and | 
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| Courier font | program files that the system | speed grade: - 100 | |
| 
 | displays | 
 | |
| 
 | 
 | 
 | |
| Courier bold | Literal commands you enter in | ngdbuild design_name | |
| a syntactical statement | |||
| 
 | 
 | 
 | |
| 
 | Variables in a syntax | <design_name> | |
| angle brackets < > | statement for which you must | 
 | |
| 
 | supply values | 
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| 
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 | 
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| 
 | References to other manuals | See the Initiator/Target User | |
| 
 | Guide for more information. | ||
| 
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| 
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| Italic font | 
 | If a wire is drawn so that it | |
| 
 | Emphasis in text | overlaps the pin of a symbol, | |
| 
 | the two nets are not | ||
| 
 | 
 | ||
| 
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 | connected. | |
| 
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 | 
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| 
 | An optional entry or | 
 | |
| Square brackets [ ] | parameter. However, in bus | ngdbuild [option_name] | |
| specifications, such as | design_name | ||
| 
 | |||
| 
 | bus[7:0], they are required. | 
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| 
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 | 
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| Braces { } | A list of items from which you | lowpwr ={onoff} | |
| must choose one or more | |||
| 
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| 
 | 
 | 
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| Vertical bar | Separates items in a list of | lowpwr ={onoff} | |
| choices | |||
| 
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| 
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| Vertical ellipsis | 
 | IOB #1: Name = QOUT’ | |
| Repetitive material that has | IOB #2: Name = CLKIN’ | ||
| . | |||
| . | |||
| . | been omitted | ||
| . | |||
| . | 
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| Horizontal ellipsis . . . | Omitted repetitive material | allow block block_name | |
| 
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 | loc1 loc2... locn; | 
| 10 | www.xilinx.com | 
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 | UG158 March 24, 2008 |