Intel 31244 PCI-X User Manual

Design Guide

Intel

31244 PCI-X to Serial ATA Controller

Contents

About This Document ......................................................................................................................9

1.1

Reference Documentation .................................................................................................... 9

1.2

Terminology and Definitions ................................................................................................. 9

Overview........................................................................................................................................ 13

2.1

Features.............................................................................................................................. 13

2.2

Applications ........................................................................................................................ 15

Intel

31244 PCI-X to Serial ATA Controller Package ..................................................................17

3.1

Signal Pin Descriptions ....................................................................................................... 18
3.1.1

VA0, VA1 (V

CCPLL

) Pin Requirements................................................................... 21

3.2

Package/Marking Information ............................................................................................. 22

3.3

Ball Map By Function .......................................................................................................... 23

Routing Guidelines ........................................................................................................................ 25

4.1

General Routing Guidelines................................................................................................ 25

4.2

Crosstalk ............................................................................................................................. 26

4.3

EMI Considerations ............................................................................................................ 27

4.4

Power Distribution and Decoupling.....................................................................................28
4.4.1

Decoupling ............................................................................................................. 28
4.4.1.1

Intel

31244 PCI-X to Serial ATA Controller Decoupling....................... 28

4.5

Trace Impedance ................................................................................................................ 29
4.5.1

Differential Impedance ........................................................................................... 29

Intel

31244 PCI-X to Serial ATA Controller Interface Ports ......................................................... 31

5.1

Serial ROM Interface .......................................................................................................... 31

5.2

JTAG Interface....................................................................................................................31

5.3

PCI-X Interface ................................................................................................................... 32

5.4

Serial ATA Interface............................................................................................................ 33
5.4.1

Direct Port Access (DPA)....................................................................................... 33

5.4.2

Extended Voltage Mode ........................................................................................ 33

5.4.3

LED Interface ......................................................................................................... 34

5.4.4

Reference Clock Generation ................................................................................. 35

Printed Circuit Board (PCB) Methodology .....................................................................................37

6.1

Intel

31244 PCI-X to Serial ATA Controller

Normal Mode (standard SATA driver) ................................................................................ 38
6.1.1

Intel

31244 PCI-X to Serial ATA Controller HBA Stackup ................................... 39

6.2

Extended Voltage Mode ..................................................................................................... 39
6.2.1

Backplane Topologies ........................................................................................... 40

6.2.2

Motherboard Stackup for Backplane Designs........................................................ 42

6.2.3

Backplane Stripline Stackup .................................................................................. 44

6.2.4

Cable Interconnect With Backplane.......................................................................45

PCI-X Layout Guidelines ...............................................................................................................47

7.1

PCI Voltage Levels ............................................................................................................. 47

7.2

PCI/X Clocking Modes ........................................................................................................48