Terasic PCA3 User Manual
PCA3 User Manual
www.terasic.com
February 8, 2018
1
CONTENTS
Chapter 1 Introduction ..................................................................................................................... 2
1.1 Package Contents ........................................................................................................................................ 2
1.2 Features....................................................................................................................................................... 3
1.3 Getting Help ............................................................................................................................................... 4
Chapter 2 Architecture ..................................................................................................................... 5
2.1 Layout and Components ............................................................................................................................. 5
2.2 Block Diagram of the PCA3 card ............................................................................................................... 6
Chapter 3 Card Components ........................................................................................................... 8
3.1 PCIe Edge Connector ................................................................................................................................. 8
3.2 PCIe Cable Connector .............................................................................................................................. 10
3.3 LEDs ......................................................................................................................................................... 14
3.4 Lane Re-driver IC ..................................................................................................................................... 14
Chapter 4 Setup Example .............................................................................................................. 16
4.1 Introduction .............................................................................................................................................. 16
4.2 PC PCI Express Software SDK ................................................................................................................ 16
4.3 Reference Design - Fundamental ............................................................................................................. 28
4.4 PCIe Reference Design – DDR3 .............................................................................................................. 34
Chapter 5 Appendix ..................................................................................................................... 41
5.1 Revision History ....................................................................................................................................... 41
5.2 Copyright Statement ................................................................................................................................. 41
PCA3 User Manual
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February 8, 2018
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Chapter 1
Introduction
PCA3 (PCIe Cable Adapter, Gen 3) is a conversion card to connect boards with your host PC. It can
support up to PCIe Gen 3 x4. Users with boards such as Terasic TR4 and TR5 can establish
high-speed data transmission through this card and the PCIe cable via PCIe connector to any host
PC. It provides automatic rate-detect and adaptation to PCIe Gen-1, Gen-2, and Gen-3 speeds.
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Figure 1-1 The PCA3 package contents
The PCA3 package includes:
PCA3 card
System CD Download Guide
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FFeeaattuurreess
Figure 1- shows a photograph of the PCA3.
Figure 1-2 Exterior View
The key features of the card are listed below:
• Up to 8.0Gbps PCIe 3.0 Serial Re-Driver
• PCIe x4 Gen 3
• Adjustable receiver equalization
• Adjustable transmitter amplitude and de-emphasis
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GGeettttiinngg HHeellpp
Here is information of how to get help if you encounter any problem:
Terasic Technologies
• Tel: +886-3-550-8800
• Email: support@terasic.com
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Chapter 2
Architecture
This chapter provides information about architecture and block diagram of the PCA3 card.
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The picture of the Terasic PCIe x4 Cable Adapter (PCA3) is shown in Figure 2-1 and Figure 2-2. It
depicts the layout of the card and indicates the locations of the connectors and key components.
Figure 2-1 The PCA3 Card PCB and Component Diagram (top view)
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Figure 2-2 The PCA3 Card PCB and Component Diagram (bottom view)
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Figure 2-3 shows the block diagram of the PCA3 card.
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Figure 2-3 Block Diagram of PCA3
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Chapter 3
Card Components
This chapter describes the specifications of the onboard components.
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This PCIe edge connector is used to connect the PCA3 with PC motherboard PCIe slot, as show
Figure 3-1 and Figure 3-2.
Figure 3-1 PCA3 Edge Connector
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Figure 3-2 Plug the PCA3 into the PCIe slot of the Motherboard
The pins are defined as shown in Table 3-1 with side A on the top of the center-line on the solder
side of the card and side B on the bottom of the centerline on the component side of the card.
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.
Table 3-1 gives the wiring information of the PCIe Edge connector.
Table 3-1 Pin assignments and descriptions on PCIe Edge connector
Pin Numbers
Side B
Side A
Name
Description
Name
Description
1
NC
NC
PRSNT1n
Hot-Plug presence
detect
2
NC
NC
NC
NC 3 NC
NC
NC
NC 4 GND
Ground
GND
Ground
5
SMCLK
System Clock
NC
NC
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6
SMDAT
System Data Line
NC
NC 7 GND
Ground
NC
NC 8 VCC3P3
3.3V Power
NC
NC 9 NC
NC
VCC3P3
3.3V Power
10
3.3VAUX
3.3 V Auxiliary
Power
VCC3P3
3.3V Power
11
WAKE
NC
PERSTn
Fundamental
Reset
Mechanical Key
12
RSVD
Reserved
GND
Ground
13
GND
Ground
REFCLK+
Reference clock
(differential
pair)
14
PETp0
Transmitter
differential pair,
Lane 0
REFCLK15
PETn0
GND
Ground
16
GND
Ground
PERp0
Receiver
differential pair,
Lane 0
17
PRSNT2n
Hot-Plug presence
detect
PERn0
18
GND
Ground
GND
Ground
19
PETp1
Transmitter
differential pair,
Lane 1
RSVD
Reserved
20
PETn1
GND
Ground
21
GND
Ground
PERp1
Receiver
differential pair,
Lane 1
22
GND
Ground
PERn1
23
PETp2
Transmitter
differential pair,
Lane 2
GND
Ground
24
PETn2
GND
Ground
25
GND
Ground
PERp2
Receiver
differential pair,
Lane 2
26
GND
Ground
PERn2
27
PETp3
Transmitter
differential pair,
Lane 3
GND
Ground
28
PETn3
GND
Ground
29
GND
Ground
PERp3
Receiver
differential pair,
Lane 3
30
RSVD
Reserved
PERn3
31
PRSNT2n
Hot-Plug presence
detect
GND
Ground
32
GND
Ground
RSVD
Reserved
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A PCIe cable connector is used to connect the PCIe x4 Cable and PCA cable connector, connect the
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adapter by using a PCIe x4 Cable, as show Figure 3-3.
Figure 3-3 PCIe x4 Cable and PCA3
To purchase the PCIe x4 Cable, please refer to the url: PCIe_Cable.terasic.com.
Figure 3-4 shows the PCIe Cable connects PCA3 connector
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Figure 3-4 PCIe Cable and PCA3 connector Connected
Table 3-2 gives the wiring information of the PCIe Cable connector.
Table 3-2 wiring information of the PCIe Cable connector
Pin Numbers
Name
Description
A1
GND
Ground reference for PCI
Express transmitter Lanes
A2
PETp0
Differential PCI Express
transmitter Lane 0
A3
PETn0
Differential PCI Express
transmitter Lane 0
A4
GND
Ground reference for PCI
Express transmitter Lanes
A5
PETp1
Differential PCI Express
transmitter Lane 1
A6
PETn1
Differential PCI Express
transmitter Lane 1
A7
GND
Ground reference for PCI
Express transmitter Lanes
A8
PETp2
Differential PCI Express
transmitter Lane 2
A9
PETn2
Differential PCI Express
transmitter Lane 2
A10
GND
Ground reference for PCI
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