450NX Datasheet, PDF (3/248 Pages) Intel Corporation – Intel 450NX PCIset

CONTENTS
Chapter 1
Introduction ......................................................................................................................................... 1-1
1.1 Overview ..................................................................................................................................................... 1-1
1.2 Intel^® 450NX PCIset Components .............................................................................................................. 1-2
1.3 Intel^® 450NX PCIset Feature Summary ...................................................................................................... 1-3
1.4 Packaging & Power ..................................................................................................................................... 1-4
Chapter 2
Signal Descriptions ............................................................................................................................ 2-1
2.1 Conventions ................................................................................................................................................ 2-1
2.2 Summary ..................................................................................................................................................... 2-2
2.2.1 Signal Summary, By Component .................................................................................................. 2-2
2.2.1.1 MIOC Signal List .......................................................................................................... 2-3
2.2.1.2 PXB Signal List ............................................................................................................ 2-4
2.2.1.3 RCG Signal List ........................................................................................................... 2-5
2.2.1.4 MUX Signal List ........................................................................................................... 2-5
2.3 System Interface ......................................................................................................................................... 2-6
2.3.1 System / MIOC Interface ............................................................................................................... 2-6
2.3.2 Third-Party Agent / MIOC Interface .............................................................................................. 2-8
2.4 PCI Interface ............................................................................................................................................... 2-8
2.4.1 Primary Bus .................................................................................................................................. 2-8
2.4.2 64-bit Access Support ................................................................................................................. 2-10
2.4.3 Internal vs. External Arbitration ................................................................................................... 2-10
2.4.4 PIIX4E Interface .......................................................................................................................... 2-11
2.5 Memory Subsystem Interface .................................................................................................................... 2-12
2.5.1 External Interface ........................................................................................................................ 2-12
2.5.2 Internal Interface ......................................................................................................................... 2-14
2.5.2.1 RCG / DRAM Interface .............................................................................................. 2-14
2.5.2.2 DRAM / MUX Interface .............................................................................................. 2-15
2.5.2.3 RCG / MUX Interface ................................................................................................. 2-15
2.6 Expander Interface .................................................................................................................................... 2-15
2.7 Common Support Signals ......................................................................................................................... 2-17
2.7.1 JTAG Interface ............................................................................................................................ 2-17
2.7.2 Reference Signals ....................................................................................................................... 2-17
2.8 Component-Specific Support Signals ........................................................................................................ 2-18
2.8.1 MIOC ........................................................................................................................................... 2-18
2.8.2 PXB ............................................................................................................................................ 2-19
2.8.3 RCG ............................................................................................................................................ 2-19
2.8.4 MUX ............................................................................................................................................ 2-19
Chapter 3
Register Descriptions ......................................................................................................................... 3-1
3.1 Access Restrictions ..................................................................................................................................... 3-1
3.2 I/O Mapped Registers ................................................................................................................................. 3-1
3.2.1 CONFIG_ADDRESS: Configuration Address Register ............................................................... 3-1
Intel® 450NX PCIset
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