One Stop Systems
OSS-PCIe-HIB2-EC-x4
Rev. A
3.c. 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. On the x4 connector, the pins are recessed far back inside the EMI Housing Guide (metallic
shell) and are not easily accessed.
3.d. 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 A, Pin 1
Row B, Pin 19
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