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Terasic PCA User Manual

Pcie x4 cable adapter
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Summary of Contents for Terasic PCA

  • Page 2: Table Of Contents

    1.2 Getting Help ............................... 3 Chapter 2 Architecture ........................4 2.1 Layout and Components ..........................4 2.2 Block Diagram of the PCA Board ......................5 Chapter 3 Board Components ......................7 3.1 PCIe Edge Connector ..........................7 3.2 PCIe Cable Connector ..........................9 3.3 Switches ..............................

  • Page 3: Chapter 1 Introduction

    Chapter 1 Introduction The Terasic PCIe x4 Cable Adapter (PCA) is used to connect a PCIe upstream slot with downstream target board via PCIe x4 cable, supporting PCIe x4 & x1 lanes. The PCA can provide programmable equalization, amplification, and de-emphasis for PCIe transceiver signal by using 8 select bits.

  • Page 4: Getting Help

    • Up to 5.0Gbps PCIe 2.0 Serial Re-Driver • PCIe x4 Gen 2 • Adjustable receiver equalization • Adjustable transmitter amplitude and de-emphasis Here is information of how to get help if you encounter any problem: Terasic Technologies • Tel: +886-3-550-8800 • Email: support@terasic.com...

  • Page 5: Chapter 2 Architecture

    Chapter 2 Architecture This chapter provides information about architecture and block diagram of the PCA board. The picture of the Terasic PCIe x4 Cable Adapter (PCA) is shown in Figure 2-1 Figure 2-2. It depicts the layout of the board and indicates the locations of the connectors and key components.

  • Page 6: Block Diagram Of The Pca Board

    Figure 2-2 The PCA Card PCB and Component Diagram (bottom view) Figure 2-3 shows the block diagram of the PCA card.
  • Page 7 Figure 2-3 Block Diagram of PCA...

  • Page 8: Chapter 3 Board Components

    Chapter 3 Board Components This chapter describes the specifications of the on board components. This PCIe edge connector is used to connect the PCA with PC motherboard PCIe slot, as show Figure 3-1 Figure 3-2. Figure 3-1 PCA Edge Connector...
  • Page 9 The PCIe interface pins PETpx, PETnx, PERpx, and PERnx are named with the following convention: “PE” stands for PCIe high speed, “T” for Transmitter, “R” for Receiver, “p” for positive (+), and “n” for negative (-). Note that adjacent differential pairs are separated by two ground pins to manage the connector crosstalk.

  • Page 10: Pcie Cable Connector

    Ground RSVD Reserved A PCIe cable connector is used to connect the PCIe x4 Cable and PCA cable connector, Connect the adapter by using a PCIe x4 Cable, as show Figure 3-3. Figure 3-3 PCIe x4 Cable and PCA To purchase the PCIe x4 Cable, please refer the url: PCIe_Cable.terasic.com.
  • Page 11 Figure 3-4 PCIe Cable and PCA connector Connected Table 3-2 gives the wiring information of the PCIe Cable connector. Pin Numbers Name Description Ground reference for PCI Express transmitter Lanes PETp0 Differential PCI Express transmitter Lane 0 PETn0 Differential PCI Express...
  • Page 12 PETp3 Differential PCI Express transmitter Lane 3 PETn3 Differential PCI Express transmitter Lane 3 Ground reference for PCI Express transmitter Lanes CREFCLK+ Differential 100MHz cable reference clock CREFCLK- Differential 100MHz cable reference clock Ground reference for PCI Express transmitter Lanes SB_RTN Signal return for single ended sideband signals...

  • Page 13: Switches

    (optional) CPERSTn Cable PERSTn The PCA contains x2 and x8 switches that allow configuration of the PCA PCIe mode (SW1), equalization and de-emphasis (SW2). The two switches, SW1 and SW2, are located on top of the front side of the PCA card.
  • Page 14 Figure 3-6 show the SW1 settings Table 3-3 SW1 Settings Pin 2 Pin 1 PCIe Mode (x1/x4) NULL Down Down x4(Default mode) Down Down NULL Figure 3-7 Show the SW2 Settings...
  • Page 15 The PI2EQX5904 chip located on the PCA has two channels, A and B, which are separately equalization controlled. shows the block diagram of the channel A and B. Table 3-4 & Figure 3-8 Table 3-5 list the SW2 pins settings on Equalizer Configuration for channel A or channel B.

  • Page 16: Leds

    CH_B Receiver Detect Disable CH_A Receiver Detect Disable CH_B Receiver Detect Enable CH_A & CH_B Receiver Detect Disable The PCA includes status LEDs, Please refer Table 3-7 for the status of the LED indicator. Board LED name Description Reference Cable PRSNT1n...
  • Page 17 EDGE Edge PRSNT1n POWER Power LED SIG_A Signal detect output for CH_A SIG_B Signal detect output for CH_B RX50_A Receiver Detect Output for CH_A0 RX50_B Receiver Detect Output for CH_B0...

  • Page 18: Chapter 4 Appendix

    Appendix Chapter 4 Version Change Log V1.0 Initial Version (Preliminary) V1.1 Delete the chapter of TR4 demo Copyright © 2012 Terasic Technologies. All rights reserved.
  • Page 19 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Terasic P0113...

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