© 2011 Advanced Micro Devices, Inc.
AMD RX881 Databook 1.40
Proprietary
Table of Contents-1
Table of Contents
Chapter 1: Overview
1.1 Introducing the RX881
........................................................................................................................................................1-1
1.2 RX881 Features
...................................................................................................................................................................1-1
1.2.1
CPU HyperTransport™ Interface
.........................................................................................................................1-1
1.2.2
PCI Express® Interface
........................................................................................................................................1-1
1.2.3
A-Link Express II Interface
..................................................................................................................................1-2
1.2.4
System Clocks
......................................................................................................................................................1-2
1.2.5
Power Management Features
...............................................................................................................................1-2
1.2.6
PC Design Guide Compliance
..............................................................................................................................1-2
1.2.7
Test Capability Features
.......................................................................................................................................1-2
1.2.8
Packaging
.............................................................................................................................................................1-3
1.3 Software Features
................................................................................................................................................................1-3
1.4 Branding Diagram
...............................................................................................................................................................1-3
1.5 Conventions and Notations
.................................................................................................................................................1-4
1.5.1
Pin Names
.............................................................................................................................................................1-4
1.5.2
Pin Types
..............................................................................................................................................................1-4
1.5.3
Numeric Representation
.......................................................................................................................................1-4
1.5.4
Register Field
........................................................................................................................................................1-4
1.5.5
Hyperlinks
............................................................................................................................................................1-4
1.5.6
Acronyms and Abbreviations
...............................................................................................................................1-4
Chapter 2: Functional Descriptions
2.1 Host Interface
......................................................................................................................................................................2-1
2.2 Clock Generation
................................................................................................................................................................2-3
Chapter 3: Pin Descriptions and Strap Options
3.1 RX881 Pin Assignment Top View
......................................................................................................................................3-2
3.2 Interface Block Diagram
.....................................................................................................................................................3-4
3.3 CPU HyperTransport™ Interface
.......................................................................................................................................3-5
3.4 PCI Express® Interfaces
.....................................................................................................................................................3-5
3.4.1
1 x 16 Lane Interface for External Graphics
........................................................................................................3-5
3.4.2
A-Link Express II Interface for Southbridge
........................................................................................................3-5
3.4.3
6 x 1 Lane Interface for General Purpose External Devices
...............................................................................3-6
3.4.4
Miscellaneous PCI Express® Signals
..................................................................................................................3-6
3.5 Clock Interface
....................................................................................................................................................................3-6
3.6 Power Management Pins
....................................................................................................................................................3-7
3.7 Miscellaneous Pins
..............................................................................................................................................................3-7
3.8 Power Pins
...........................................................................................................................................................................3-8
3.9 Ground Pins
.........................................................................................................................................................................3-9
3.10 Strapping Options
.............................................................................................................................................................3-9
Chapter 4: Timing Specifications
4.1 HyperTransport™ Bus Timing
...........................................................................................................................................4-1
4.2 HyperTransport™ Reference Clock Timing Parameters
....................................................................................................4-1
4.3 PCI Express® Differential Clock AC Specifications
.........................................................................................................4-2
4.4 Power Rail Power-up Sequence
..........................................................................................................................................4-2