Terasic PCA User manual
1
CONTENTS
Chapter 1 Introduction ........................................................................................................................2
1.1 Features.......................................................................................................................................................2
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....................................................................................................................................................12
3.4 LEDs.........................................................................................................................................................15
Chapter 4 Appendix...........................................................................................................................17
4.1 Revision History.......................................................................................................................................17
4.2 Copyright Statement.................................................................................................................................17
2
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. It is also available to optimize performance over a variety of physical mediums by
reducing Inter-symbol interference.
1
1.
.1
1
F
Fe
ea
at
tu
ur
re
es
s
Figure 1-1 shows a photograph of the PCA.
Figure 1-1 Exterior View
The key features of the card are listed below:
3
•Up to 5.0Gbps PCIe 2.0 Serial Re-Driver
•PCIe x4 Gen 2
•Adjustable receiver equalization
•Adjustable transmitter amplitude and de-emphasis
1
1.
.2
2
G
Ge
et
tt
ti
in
ng
g
H
He
el
lp
p
Here is information of how to get help if you encounter any problem:
Terasic Technologies
•Tel: +886-3-550-8800
•Email: [email protected]
4
Chapter 2
Architecture
This chapter provides information about architecture and block diagram of the PCA board.
2
2.
.1
1
L
La
ay
yo
ou
ut
t
a
an
nd
d
C
Co
om
mp
po
on
ne
en
nt
ts
s
The picture of the Terasic PCIe x4 Cable Adapter (PCA) is shown in Figure 2-1 and Figure 2-2. It
depicts the layout of the board and indicates the locations of the connectors and key components.
Figure 2-1 The PCA Card PCB and Component Diagram (top view)
5
Figure 2-2 The PCA Card PCB and Component Diagram (bottom view)
2
2.
.2
2
B
Bl
lo
oc
ck
k
D
Di
ia
ag
gr
ra
am
m
o
of
f
t
th
he
e
P
PC
CA
A
B
Bo
oa
ar
rd
d
Figure 2-3 shows the block diagram of the PCA card.
6
Figure 2-3 Block Diagram of PCA
7
Chapter 3
Board Components
This chapter describes the specifications of the on board components.
3
3.
.1
1
P
PC
CI
Ie
e
E
Ed
dg
ge
e
C
Co
on
nn
ne
ec
ct
to
or
r
This PCIe edge connector is used to connect the PCA with PC motherboard PCIe slot, as show
Figure 3-1 and Figure 3-2.
Figure 3-1 PCA Edge Connector
Figure 3-2 Plug the PCA into the PCIe slot of the Motherboard
The pins are numbered as shown in Table 3-1 with side A on the top of the center-line on the solder
side of the board and side B on the bottom of the centerline on the component side of the board.
8
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
NC
NC
NC
NC
6
NC
NC
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
REFCLK-
15
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
20
PETn1
GND
Ground
21
GND
Ground
PERp1
Receiver
differential pair,
Lane 1
22
GND
Ground
PERn1
23
PETp2
Transmitter
differential pair,
GND
Ground
24
PETn2
GND
Ground
9
Lane 2
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
3
3.
.2
2
P
PC
CI
Ie
e
C
Ca
ab
bl
le
e
C
Co
on
nn
ne
ec
ct
to
or
r
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.
Figure 3-4 as show the PCIe Cable connects PCA connector
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