Table of Contents 1. Overview 1.a. Unpacking instructions ........................................................................................................................ 1 1.b. Product description.............................................................................................................................. 1 1.c. Specifications....................................................................................................................................... 1 1.d. Block diagram...
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.
1.d. Block Diagram Clock* Clock* LVPECL Clock Buffer x4 PCIe Tx PCIe Signal Redriver x4 PCIe Rx PCIe Signal Redriver x4 PCIe Tx x4 PCIe Rx +3.3v CPRSNT# LEDs Cable Present/ Pwr Downstream x4 PCI Express Cable Connector LEDs PCIe lane status *Clock direction shown in Host configuration Upstream x4 PCI Express Card Edge Connector 2. Initial Set-Up 2.a. Installation and removal 1) Power down the host system. 2) Open the chassis according to your system documentation.
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 Rev.
2.c. Removing the Host Cable Adapter 1) 2) To remove cable pull back on green thumb tab to release connector teeth and gently separate. 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. 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.
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.
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 (-).
26 GND 27 PETp3 28 Ground PERn2 GND Ground PETn3 Transmitter differential pair, Lane 3 GND Ground 29 GND Ground PERp3 30 RSVD Reserved PERn3 31 PRSNT2# Hot-Plug presence detect GND Ground 32 GND Ground RSVD Reserved Receiver differential pair, Lane 3 Table 1: Pin-out for the PCIe x4 Card Edge Connector on the Host Cable Adapter Notes: 1 Optional signals that are not implemented are to be left as no connects on the board side connector.
Pin # A1 A4 A7 A10 A13 A16 B1 B4 B7 B10 B13 A2 A3 A5 A6 Cable Side 1 GND Pin # A8 A9 A11 A12 A14 A15 A17 A18 A19 B2 B3 B5 B6 B8 B9 B11 B12 B14 B15 B16 B17 B18 B19 Cable Side 1 PETp2 PETn2 PETp3 PETn3 CREFCLK+ CREFCLK SB_RTN CPRSNT# CPWRON PERp0 PERn0 PERp1 PERn1 PERp2 PERn2 PERp3 PERn3 PWR PWR PWR_RTN PWR_RTN CWAKE# CPERST# Back shell Chassis Ground PETp0 PETn0 PETp1 PETn1 Drain Wires Differential Pair Differential Pair Differential Pair Differential Pair Differential Pair Hook-up Wire Hook-up Wire
