ARM AMBA NIC-301 Dokumentacja Pobierz pdf (Strona 8)

Preface

ID062813 Non-Confidential

Typographical conventions

The following table describes the typographical conventions:

Timing diagrams

The figure named Key to timing diagram conventions explains the components used in timing

diagrams. Variations, when they occur, have clear labels. You must not assume any timing

information that is not explicit in the diagrams.

Shaded bus and signal areas are undefined, so the bus or signal can assume any value within the

shaded area at that time. The actual level is unimportant and does not affect normal operation.

Key to timing diagram conventions

Timing diagrams sometimes show single-bit signals as HIGH and LOW at the same time and

they look similar to the bus change shown in Key to timing diagram conventions. If a timing

diagram shows a single-bit signal in this way then its value does not affect the accompanying

description.

Style Purpose

italic Introduces special terminology, denotes cross-references, and citations.

bold Highlights interface elements, such as menu names. Denotes signal names. Also used for terms in descriptive lists,

where appropriate.

monospace

Denotes text that you can enter at the keyboard, such as commands, file and program names, and source code.

monospace

Denotes a permitted abbreviation for a command or option. You can enter the underlined text instead of the full

command or option name.

monospace italic

Denotes arguments to monospace text where the argument is to be replaced by a specific value.

monospace bold

Denotes language keywords when used outside example code.

<and> Encloses replaceable terms for assembler syntax where they appear in code or code fragments. For example:

MRC p15, 0 <Rd>, <CRn>, <CRm>, <Opcode_2>

SMALL CAPITALS Used in body text for a few terms that have specific technical meanings, that are defined in the ARM glossary. For

example, IMPLEMENTATION DEFINED, IMPLEMENTATION SPECIFIC, UNKNOWN, and UNPREDICTABLE.

Clock

HIGH to LOW

Transient

HIGH/LOW to HIGH

Bus stable

Bus to high impedance

Bus change

High impedance to stable bus

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 177 178

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ARM AMBA NIC-301 Dokumentacja Strona 8