Documentation Conventions

This section defines the typographical convention used throughout this book.

HyperTransport

HyperTransport is a trademark of the HyperTransport Consortium. This book takes the liberty of abbreviating HyperTransport as "HT" to improve readability.

Hexadecimal Notation

All hex numbers are followed by a lower case "h." For example:

89F2BD02h

0111h

Binary Notation

All binary numbers are followed by a lower case "b." For example:

1000 1001 1111 0010b

01b

Decimal Notation

Numbers without any suffix are decimal. When required for clarity, decimal numbers are followed by a lower case "d." Examples:

9

15

512d

Byte Terminology and Notation

This book uses the following terminology regarding quantities of data:

8-bits = 1 byte

16-bits = 2 bytes, Word

32-bits = 4 bytes, Double Word, Dword, or DW

64-bits = 8 bytes, Quad Word, Qword, or QW

Bits Versus Bytes Notation

This book represents bit with lower case "b" and bytes with an upper case "B." For example:

Megabits/second = Mb/s

Megabytes/second = MB/s

Bit Fields and Groups of Signals

Groups of signals or bits are represented with the high-order bits first followed by the low-order bits and enclosed by brackets. For example:

[7:0]

Addr[39:0]

CAD[15:0]

Active Signal States

Signals that are active low are followed by #, as in RESET#. Active high signals have no suffix following the signal, as in PWROK.