PCIe x4 Gen 2 Cable Adapter
OSS-PCIe-HIB25-x4-H (Host)
User Manual,
OSS-PCIe-HIB25-x4-T (Target)
Table of Contents
1. Overview
1.a. Unpacking instructions ........................................................................................................................1
1.b. Product description..............................................................................................................................1
1.c. Specifications.......................................................................................................................................1
1.d. Block diagram......................................................................................................................................2
2. Initial Setup
2.a. Installation and removal.......................................................................................................................2
2.b. Installing the host cable adapter..........................................................................................................2
2.c. Removing the host cable adapter........................................................................................................4
2.d. When using with any third party I/O device..........................................................................................4
3. Signal adjustments
3.a. Signal adjustment................................................................................................................................5
4. Ordering Information
Appendix
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
1. Overview
1.a. Unpacking Instructions
1) If the carton is damaged when you receive it, request that the carrier’s agent be present when you unpack and inspect
the equipment.
2) After unpacking, verify that all items listed in the packing list are present.
3) Inspect the equipment for shipping damage.
1.b. Product Description
The PCIe x4 Gen 2 cable adapter is a PCIe half-height add-in card with a PCIe x4 cable connector on the slot cover. The
host cable adapter installs in the PCIe slot of a host server and the target cable adapter installs in the target slot of the OSS
2-slot backplane. Both are sold separately or together with the 2-slot backplane in a kit (OSS-KIT-EXP-3000-2M)
Power on LED
Cable present LED
Slot Cover
(Also
available in
low profile
height)
Power on /
Cable Ready
LEDs
x4
PCIe
Connector
Note: This area is populated on
target board
1.c. Specifications
Dimensions (H x L): 2.2 x 4.5 inches (55 x 114mm)
Front Panel Connectors: One PCIe x4 cable connector
Front Panel Indicators:
Power On / Cable Present: LEDs
Power Consumption (designed to meet the following conditions): 3.75W typical, 3.3@1.3A
Operating Environment (designed to meet the following conditions)
Temperature Range: 0° to 50°C (32° to 122°F)
Relative Humidity: 10 to 90% non-condensing
Shock: 30g acceleration peak (11ms pulse)
Vibration: 5-17 Hz 0.5” double amplitude displacement; 7-2000Hz, 1.5g acceleration.
Redriver: Pericom PI2EQX5804
Agency Compliance: UL60950.FCC Class B, CE
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 1
1.d. Block Diagram
Downstream
x4 PCI Express
Cable Connector
Clock*
LVPECL
Clock Buffer
x4 PCIe Tx x4 PCIe Tx
x4 PCIe Rx x4 PCIe Rx
CPRSNT#
Cable Present/ Pwr
*Clock direction shown in Host configuration
PCIe Signal
PCIe Signal
LEDs
Redriver
Redriver
LEDs
PCIe lane status
Clock*
+3.3v
Card Edge Connector
Upstream
x4 PCI Express
2. Initial Set-Up
2.a. Installation and removal
1) Power down the host system.
2) Open the chassis according to your system documentation.
3) Remove the host cable adapte r from the protective bag, observing proper ESD safety procedures.
2.b. Installing the host cable adapter:
1) Insert the host cable adapter into a PCIe x4, x8 or x16 add-in slot in the host motherboard. Make sure that the card is well
seated and tighten the screw on the top of the slot cover.
2) Attach the cable by first pulling back on the retractor ring. Align the ke yed slot with the connector key ridge on the slot
cover. Insert the cable connector into the connector shell on the board until the connector teeth snap secu rely into the
holes in the cable shell.
3) The connectors on either end of the PCIe x4 cable are identical. Each connector is equipped with a retractor to allow the
connector to be locked into place.
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 2
Holes in the cable
shell
Output swing control dip
switch (Table 2)
Connector teeth
Equalizer and de-emphasis
adjustments (Table 1,3)
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 3
2.c. Removing the Host Cable Adapter
1) To remove cable pull back on green thumb tab to release connector teeth and gentl y separate.
2) Loosen and remove the screw before removing the Host Cable Adapter from the card slot.
2.d. When using with any third party I/O device:
1) Install the downstream board into the appropriate PCIe slot.
2) Connect the external power source (separate from the host system power supply) to the downstream device if
necessary.
3) Connect the PCIe cable to both the upstream host adapter and the downstream device.
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 4
3. Signal adjustment
3.a. Signal Adjustment
The following chart indicates the default settings for the signal equalization.
SEL_2[A:D] SEL_1[A:D] SEL_0[A:D] @1.25GHZ @2.5GHZ
0 0 0 0.5dB 1.2dB
0 0 1 0.6dB 1.5dB
0 1 0 1.0dB 2.6dB
0 1 1 1.9dB 4.3dB
1 0 0 2.8dB 5.8dB
1 0 1 3.6dB 7.1dB
1 1 0 5.0dB 9.0dB
1 1 1 7.7dB 12.3dB
Table 1: Equalizer Selection (refer to call-out on photo)
The following chart indicates the default settings of the –position dip switch for output swing control.
S_1[A:D] S_0[A:D] Swing (Diff. VPP)
0 0 1V
0 1 05V
1 0 0.7V
1 1 0.9V
Table 2: Output Swing Control (refer to call-out on photo)
Cable
Default
Edge
Default
The following chart indicates the default setting for de-emphasis adjustment.
Edge
Default
Cable
Default
D2_[A:D] D1_[A:D] D0_[A;D] De-emphasis
0 0 0 0dB
SW=ON
Default
0 0 1 -2.5dB
0 1 0 -3.5dB
0 1 1 -4.5dB
1 0 0 -5.5dB
1 0 1 -6.5dB
SW=OFF
Default
1 1 0 -7.5dB
1 1 1 -8.5dB
Table 3: De-emphasis Adjustment (refer to call-out on photo)
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 5
4. Ordering Information
OSS-PCIe-HIB25-x4-H - One Stop Systems HIB25 x4 host cable adapter.
OSS-PCIe-HIB25-x4-T - One Stop Systems HIB 25 x4 target cable adapter.
Other products you may need;
OSS-PCIe-HIB25-x4-H – PCIe x4 Gen 2 host cable adapter installs in a x4, x8, x16 expansion slot of a host system to extend the
host PCIe bus to an expansion system or PCIe device.
OSS-PCIe-HIB25-x4-T – PCIe x4 Gen 2 target cable is only used with the OSS 2-slot PCIe backplane to add a single PCIe card to
a host.
OSS-PCIe-HIB25-x8-H – PCIe x8 Gen 2 host cable adapter installs in a x8 or x16 expansion slot of a host system to extend the
host PCIe bus to an expansion system or PCIe device.
OSS-PCIe-HIB25-x8-T – PCIe x8 Gen 2 target cable adapter is only used with the OSS 2-slot PCIe backplane to add a single PCIe
card to a host.
OSS-PCIe-HIB25-x16-H – PCIe x16 Gen 2 host cable adapter installs in a x16 expansion slot of a host system to extend the host
PCIe bus to an expansion system or PCIe device.
OSS-PCIe-HIB25-x16-T – PCIe x16 Gen 2 target cable adapter is only used with the OSS 2-slot PCIe backplane (OSS-PCIeBP2010, P.34) to add an additional PCIe slot to any device.
OSS-XMC-HIB25-x8 – XMC PCIe x8 Gen 2 host cable adapter installs in an XMC connector on a host carrier board and cables to a
PCIe downstream device or expansion chassis.
OSS-PCIe-HIB35-x4 – PCIe x4 Gen 2 cable adapter with PCIe switch (including NT port and DMA controller) operates in upstream
or downstream mode with DIP switch setting change.
OSS-SHB-ELB-x4/x8-2.0 – PCIe x8 or x4 Gen 2 expansion link board installs in SHBe slot of a PCIe Gen 2 backplane, allowing
either x8 or x4 cable inputs from upstream host system.
OSS-PCIe-CA-x1/x4 – PCIe cable adapter fits into slot or stand-alone, converts PCIex1 cable to PCIex4 cable.
OSS-PCIe-CA-x4/x8 – PCIe cable adapter fits into slot or stand alone, converts PCIex4 cable to PCIe x8 cable.
OSS-PCIe-CBL-x4-1M – 1 meter PCIe x4 cable with PCIe x4 connectors.
OSS-PCIe-CBL-x4-2M – 2 meter PCIe x4 cable with PCIe x4 connectors.
OSS-PCIe-CBL-x4-3M – 3 meter PCIe x4 cable with PCIe x4 connectors.
OSS-PCIe-CBL-x4-5M – 5 meter PCIe x4 cable with PCIe x4 connectors.
OSS-PCIe-CBL-x4-7M – 7 meter PCIe x4 cable with PCIe x4 connectors.
OSS-PCIe-CBL-ACT-x4-10M – 10 meter active optical cable with PCIe x4 connectors.
OSS-PCIe-CBL-ACT-x4-100M – 100 meter active optical cable with PCIe x4 connectors.
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 6
Appendix
Pin Assignments
Connectors PCIe x4 Card Edge Connector
• The pins are numbered as shown with side A on the top of the centerline on the solder side of the board and side B on the
bottom of the centerline on the component side of the board
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 separ ated by two ground pins to manage the connector crosstalk.
Pin #
1 N/C N/C PRSNT1# Hot-Plug presence detect
2 N/C N/C N/C N/C
3 N/C N/C N/C N/C
4 GND Ground GND Ground
5 NC N/C N/C Not connected
6 N/C N/C JTAG3 TDI (Test Data Input)
7 GND Ground JTAG4 TDO (Test Data Output)
8 +3.3V 3.3 V power N/C Not connected
9 N/C Not connected N/C Not connected
10 3.3Vaux 3.3 V auxiliary power +3.3V 3.3 V power
11 N/C N/C PERST# Fundamental reset
12 RSVD Reserved GND Ground
13 GND Ground REFCLK+
14 PETp0 REFCLK
15 PETn0
16 GND Ground PERp0
17 PRSNT2# Hot-Plug presence detect PERn0
18 GND Ground GND Ground
19 PETp1 RSVD Reserved
20 PETn1
21 GND Ground PERp1
22 GND Ground PERn1
23 PETp2 GND Ground
24 PETn2
25 GND Ground PERp2
Side B
Name
Description
Mechanical key
Transmitter differential pair,
Lane 0 GND Ground
Transmitter differential pair,
Lane 1
Transmitter differential pair,
Lane 2
.
Side A
Name
GND Ground
GND Ground
Description
Reference clock (differential
pair)
Receiver differential pair, Lane 0
Receiver differential pair, Lane 1
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 7
26 GND Ground PERn2
27 PETp3 GND Ground
28 PETn3
29 GND Ground PERp3
30 RSVD Reserved PERn3
31 PRSNT2# Hot-Plug presence detect GND Ground
32 GND Ground RSVD Reserved
Notes:
1 Optional signals that are not implemented are to be left as no connects on the board side connector.
2 Reserved signals must be left as no connects on the board side connector.
3 Although support of CWAKE# is optional from the board side connector perspective, an allocated wire is mandated for the cable
assembly.
4 Board side pin-out on both sides of the Link is identical. The cable assembly incorporates a null modem for the PCIe transmit and
receive pairs.
Table 1: Pin-out for the PCIe x4 Card Edge Connector on the Host Cable Adapter
Transmitter differential pair,
Lane 3
GND Ground
Receiver differential pair, Lane 3
PCI Express x4 Cable Connector Pin out
Row B, Pin 19
Row A, Pin 1
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Page 8
Pin # Cable Side 1
A1 A4 A7 A10 A13
A16 B1 B4 B7 B10
B13
A2 PETp0 Differential Pair PERp0 B2
A3 PETn0
A5 PETp1 PERp1 B5
A6 PETn1
Pin # Cable Side 1
A8 PETp2 Differential Pair PERp2 B8
A9 PETn2
A11 PETp3 Differential Pair PERp3 B11
A12 PETn3
A14 CREFCLK+ Differential Pair CREFCLK+ A14
A15 CREFCLK
A17 SB_RTN Hook-up Wire SB_RTN A17
A18 CPRSNT# Hook-up Wire CPRSNT# A18
A19 CPWRON Hook-up Wire CPWRON A19
B2 PERp0 Differential Pair PETp0 A2
B3 PERn0
B5 PERp1 Differential Pair PETp1 A5
B6 PERn1
B8 PERp2 Differential Pair PETp2 A8
B9 PERn2
B11 PERp3 Differential Pair PETp3 A11
B12 PERn3
B14 PWR NC PWR B14
B15 PWR NC PWR B15
B16 PWR_RTN NC PWR_RTN B16
B17 PWR_RTN NC PWR_RTN B17
B18 CWAKE# Hook-up Wire CWAKE# B18
B19 CPERST# Hook-up Wire CPERST# B19
Back shell Chassis Ground
PIN- out for the PCIe x4 Cable
GND Drain Wires GND A1 A4 A7 A10 A13
Differential Pair
Overall Cable
Braid
Cable Side 2 Pin #
A16 B1 B4 B7 B10
B13
PERn0 B3
PERn1 B6
Cable Side 2 Pin #
PERn2 B9
PERn3 B12
CREFCLK- A15
PETn0 A3
PETn1 A6
PETn2 A9
PETn3 A12
Chassis Ground Back shell
Signal Descriptions
PETp(x) PCI Express Transmit Positive signal of (x) pair.
PETn(x) PCI Express Transmit Negative signal of (x) pair.
PERp(x) PCI Express Receive Positive signal of (x) pair.
PERn(x) PCI Express Receive Negative signal of (x) pair.
CREFCLK+/-
SB_RTN Side Band ReTurN: return path for single ended signals from remote systems.
CPRSNT# Cable PReSeNT: Indicates the presence of a device beyond the cable.
PWR
PWR_RTN PoWeR ReTurN: Provides local power return path for PWR pins.
CWAKE# Cable WAKE
CPERST# Cable PCI Express Reset
One Stop Systems OSS-PCIe-HIB25-x4-H/T
Rev. A
Cable REFerence CLocK: Provides a reference clock from the host system to the
remote system.
PoWeR: Provides local power for in-cable redriver circuits. Only needed on long
cables.
Power does not go across the cable.)
Page 9
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