RadiSys PL35Q, Product Manual, Page: 48 / 72

A
Connector Description
48
PCI Express x1 slot
Note: The signals for hot plug presence detection in the table below are not supported on Q35
motherboards.
Pin #
Side B Side A
Signal Description Signal Description
1 +12V 12V power PRSNT1# Hot plug presence detect
2 +12V 12V power +12V 12V power
3 RSVD Reserved +12V 12V power
4 GND Ground GND Ground
5 SMCLK SMBus (System Management Bus)
clock JTAG2 TCK (Test Clock), clock input for JTAG
interface
6 SMDAT SMBus (System Management Bus)
data JTAG3 TDI (Test Data Input)
7 GND Ground JTAG4 TDO (Test Data Output)
8 +3.3V 3.3V power JTAG5 TMS (Test Mode Select)
9 JTAG1 TRST# (Test Reset) resets the JTAG
interface +3.3V 3.3V power
10 3.3Vaux 3.3V auxiliary power +3.3V 3.3V power
11 WAKE# Signal for link reactivation PERST# fundamental reset
Mechanical Key
12 RSVD Reserved GND Ground
13 GND Ground Reference clock (differential pair)
14 PETp0 Transmitter differential pair Lane 0 REFCLK- Reference clock (differential pair)
15 PETn0 Transmitter differential pair Lane 0 GND Ground
16 GND Ground PERp0 Receiver differential pair Lane 0
17 PRSNT2# Hot plug presence detect PERn0 Receiver differential pair Lane 0
18 GND Ground GND Ground