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PLX Technology PEX 8548-AA RDK Hardware Reference Manual

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Hardware Reference Manual
PEX 8548-AA RDK
Version 1.2
Website:
www.plxtech.com
Support:
www.plxtech.com/support
Phone:
800 759-3735
408 774-9060
Fax:
408 774-2169
July, 2007

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  • Page 1 PEX 8548-AA RDK Hardware Reference Manual Version 1.2 July, 2007 Website: www.plxtech.com Support: www.plxtech.com/support Phone: 800 759-3735 408 774-9060 Fax: 408 774-2169...
  • Page 2 © 2006 – 2007 PLX Technology, Inc. All Rights Reserved. PLX Technology, Inc. retains the right to make changes to this product at any time, without notice. Products may have minor variations to this publication, known as errata. PLX assumes no liability whatsoever, including infringement of any patent or copyright, for sale and use of PLX products.

  • Page 3: Table Of Contents

    Trace Routing Design Rules ....................18 4.2.2 Power Decoupling ........................18 4.2.3 PCB Layer Stackup......................... 19 Frequently Asked Questions........................ 20 Bill of Materials............................. 21 Schematics............................27 References............................37 PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 4 Tables Table 1. PEX 8548RDK Monitoring Points ....................15 Table 2. PEX 8548RDK LED Indicators ..................... 16 Table 3. PEX 8548RDK Controls ....................... 17 PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 5: Preface

    Removed “AA” from most part number references. Applied miscellaneous enhancements throughout the manual. July 3, 2007 Updated Data Book revision listed in Section 8. Added I C Specification information. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 6 THIS PAGE INTENTIONALLY LEFT BLANK. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 7: General Information

    General Information The PLX PEX 8548RDK is a Rapid Development Kit based on PLX Technology’s ExpressLane™ PEX 8548, a 9-port, 48-lane, 3-station PCI Express switch. The PEX 8548RDK provides a complete hardware and software development platform to facilitate getting designs up and running quickly, lowering risk and reducing time-to-market.

  • Page 8: Pex 8548 Switch Features

    Manual pushbutton PERST# capability Port Status indicator LEDs for visual inspection of link status Auxiliary hard disk drive header, for supporting additional power requirements for add-in boards PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 9: System Architecture

    (J2). The PEX 8548RDK provides the Reference Clock and PERST#, and a hard disk drive header (P2) provides +3.3 VDC and +12 VDC, to this connector. Figure 2. PEX 8548RDK Functional Block Diagram PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 10: Hardware Architecture

    (x8, x4, or x1) by using a small adapter board, such as those offered by Catalyst. In these situations, the PEX 8548 switch negotiates down to the narrower link width. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 11: Pci Express Downstream Port Connections

    3.) If the link width connected between the PEX 8548 switch and an add-in board’s PCI Express device is not x16, the link auto-negotiates to a common link width. Figure 3. PCI Express Board Interconnect PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 12: Figure 4. X8X4X4 And X8X8 Downstream Configurations

    Figure Breakout Board Endpoint Endpoint Endpoint Breakout Board PEX 8548 RDK PEX 8548 Figure 4. x8x4x4 and x8x8 Downstream Configurations PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 13: Downstream Port Breakout Add-In Boards

    REFCLK to the slot connectors, from the REFCLK signal provided through the male PCI Express board’s edge connector. (Refer to Figure Figure 5. Breakout Add-In Boards PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 14: Pci Express Hot Plug Circuitry

    6.) PERST# to the Station 1 Hot Plug connector is driven by the PEX 8548 switch’s Port 8 Hot Plug Controller. Figure 6. PCI Express Reset Circuitry PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 15: Port Status Indicator Leds

    7). When an LED is driven, that port is active. (Refer to Section 4.1.2, “LED Indicators,” for further details.) Figure 7. PEX 8548RDK Port Status (PORT_GOOD) Indicators PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 16: Strapping Switches - Sw7, Sw5, Sw4, Sw6, Sw8, And Sw3

    Figure 8. Strapping Switches – SW7, SW5, SW4, SW6, SW8, and SW3 Note: The grayed-out switch location in SW8 and SW3 is not used. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 17: Power Circuitry

    Hard Disk Drive PCI Express Board Edge Connector Header Figure 9. PEX 8548RDK Power Distribution Circuitry VDD_1.0V VDD_3.3V VDD_VTT Figure 10. Power-Up and Power-Down Sequencing PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 18: Serial Eeprom Interface

    Pin 1 - TRST# Pin 3 - TDI Pin 5 - TDO Pin 7 - TMS Pin 9 - TCK Figure 11. JTAG Header (Top View) PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 19: C Interface

    LEDs (DS13 through DS17) indicate (turn On) when an associated object is connected to the I C headers. (Refer to Figure 13.) Figure 12. I C Header (Top View) Figure 13. I C Configuration Control PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 20: Mechanical Architecture

    Mechanical Architecture Figure 14 illustrates the PEX 8548RDK board and component placement. Figure 14. PEX 8548RDK Mechanical Outline PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 21: Monitoring Point, Led Indicator, And Control Summary

    Test point via at this location can be used to monitor +3.3 VDC to slot J2. Test point via at this location can be used to monitor VTT voltage to the PEX 8548 switch. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 22: Led Indicators

    PEX 8548RDK first powers up. DS20, When turned On, indicates that voltages to the DS20 Green SWITCH-ON PEX 8548 switch are turned On. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 23: Controls

    Do not adjust these switches, except in the event of an unusual operation. SW8 provides DIP switch control for the following PEX 8548 switch signals: STRAP_PROBE_MODE# STRAP_FAST_BRINGUP# I2C_INTA_ENABLE# STRAP_SERDES_MODE_ENABLE# STRAP_PLL_BYPASS# PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 24: Board Layout Information

    (Refer to Figure 15.) Plane capacitance filters noise above approximately 100 MHz. Figure 15. Decoupling Capacitor Footprints PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 25: Pcb Layer Stackup

    Differential pair routing layers and plane layers arrangement provides shielding for the PCI Express signals Figure 16. PEX 8548RDK 10-Layer PCB Stackup PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 26: Frequently Asked Questions

    As such, it is designed to be used in laboratory environments. If ambient temperatures are expected to be above 40 °C, consult the PEX 8548AA Data Book to determine cooling requirements. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 27: Bill Of Materials

    C82, C126 Digi-Key 3118- 2via X5R 0603, 2 1-ND CAP .047UF ECJ- PCC22 Panasonic 1VB1H47 SMT, 0603 C121 Digi-Key 86CT- 0.047uF CERAMIC X7R 0603 PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 28 SMT, 0603 DS12, DS19 Digi-Key 8ARA TYPE LO T-ND CUR SM PCI Express PCI_EXP _X16_ST 87767- SMT, 164- Molex straddle- RADDLE 0123 mount _MNT_C connector PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 29 Select SMT, 0603- R108, R109, R110, R111, Panasonic 3GEYJ51 Digi-Key GCT- 5.1K Footprint, R112, R113, R114, R115, 0603 R116, R117, R118, R119, R120, R121 PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 30 Dual, SPST, 4.5 ohm, NC IC, Hot ISL6161C Swap Intersil SOIC14 Arrow ISL6161 Controller, Dual, PCIEx NC7SZ12 NC7SZ12 Fairchild BUFFER, SC70-5 6P5X 6P5X 24mA drive PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 31 15AU PCI Express PCI_EXP 87715- _X16_FE Molex Through- TH, 164-pin 3302 MALE_C hole connector Header, HD 15-24- IDE4_HE Molex 4-pin, Arrow 4449 ADER straight PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 32 BE ASSEMBLED RES 0.0 9C06031 311- OHM 1/10W R52, R53, R70, R72, R73, Yageo A0R00JL SMT, 0603 Digi-Key 0.0GC 5% 0603 R74, R75 T-ND PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

  • Page 33: Schematics

    Schematics This section provides a copy of the PEX 8548RDK Schematics. PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.
  • Page 39 OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN...

  • Page 43: References

    PCI Express Base Specification, Revision 1.1 PCI Express Card Electromechanical (CEM) Specification, Revisions 1.0a and 1.1 NXP Semiconductors www.standardics.nxp.com The I2C-Bus Specification, Version 2.1 PEX 8548-AA RDK Hardware Reference Manual, Version 1.2 © 2007 PLX Technology, Inc. All Rights Reserved.

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