PCI Express x4 Cable Connector
The PCI Express x4 connector is a 38 position edge card connector with metallic shell as defined in the PCI Express External
Cabling Rev 1.0, Molex part number 75586-0010, or equivalent. On the x4 connector, the pins are recessed far back inside the EMI
Housing Guide (metallic shell) and are not easily accessed.
PCI Express x4 Connector Pin Assignment
Pin
#
Row A
Signal Name
Row
B
Signal Name
Pin
#
1 GND
GND
1
2 PET0+
PER0+
2
3 PET0-
PER0-
3
4 GND
GND
4
5 N/C
N/C
5
6 N/C
N/C
6
7 GND
GND
7
8 N/C
N/C
8
9 N/C
N/C
9
10 GND
GND
10
11 N/C
N/C
11
12 N/C
N/C
12
13 GND
GND
13
14
3.3V
14
15 CREFCLK-
3.3V
15
16 GND
GND
16
17 GND
GND
17
18 CPRSNT#
CWAKE#
18
19 CPWRON
CPERST#
19
Row B, Pin 19
Row A, Pin 1
OSS-EBP-2000 Backplane
The OSS-EBP-2000 has two PCI Express x8 link slots connected together. One
slot supports the OSS-PCIe-HIB2-x4-T that brings a remote PCIe bus to the
backplane via a cable interface. Any x8, x4, or x1 IO PCIe add-in board can be
installed in the second slot and operate as a remote slot from the host PC. For
example, the One Stop Systems quad USB board can be installed in the
second slot allowing four USB devices to be operated from the remote
computer
.
One Stop Systems, Inc. Host Cable Adapter User Manual
Rev. A
7
