３３
Signal
Pin# Description
I/O
Note
PC
PCIE_RX30-
C98
C99
PCIe channel 30. Receive Input differential pair.
Carrier Board:
Device - Connect AC Coupling cap
0.1/0.22uF
near
to PCIE device PETp/nX.
N/C if not used.
I PCIE
3
PC
PCIE_TX30-
D98
D99
PCIe channel 30. Transmit Output differential pair.
Module has integrated AC Coupling Capacitor.
Carrier Board:
Device - Connect to PCIE device PERp/nX.
N/C if not used.
O PCIE
3
PC
PCIE_RX31-
C101
C102
PCIe channel 31. Receive Input differential pair.
Carrier Board:
Device - Connect AC Coupling cap
0.1/0.22uF
near
to PCIE device PETp/nX.
N/C if not used.
I PCIE
3
PC
PCIE_TX31-
D101
D102
PCIe channel 31. Transmit Output differential pair.
Module has integrated AC Coupling Capacitor.
Carrier Board:
Device - Connect to PCIE device PERp/nX.
N/C if not used.
O PCIE
3
PCIE_
PCIE_CLK_REF-
A88
A89
PCIe Reference Clock for all COM Express PCIe
lanes, and for PEG lanes.
Carrier Board:
Connect 0Ω in series to
Device - PCIE device , REFCLK-.
Slot - PCIE Conn pin A13 , A14
REFCLK-.
*Connect to PCIE Clock Buffer input to provide
PCIE clocks output for more than one PCIE devices
or slots.
N/C if not used.
O PCIE
Notes:
1. SOM-5992 Default : I210.
2. Only support PCIe Gen2.
3. The AC Coupling cap 0.1uF is used for Gen2 and 0.22uF is used for Gen3.
