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Design Guide 3
Intel
®
31244 PCI-X to Serial ATA Controller
Contents
Contents
1 About This Document ......................................................................................................................9
1.1 Reference Documentation ....................................................................................................9
1.2 Terminology and Definitions .................................................................................................9
2 Overview........................................................................................................................................13
2.1 Features..............................................................................................................................13
2.2 Applications ........................................................................................................................15
3Intel
®
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
4 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
5Intel
®
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
6 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
7 PCI-X Layout Guidelines ...............................................................................................................47
7.1 PCI Voltage Levels .............................................................................................................47
7.2 PCI/X Clocking Modes........................................................................................................48