COMe-bV26 - Rev. 1.0, User Guide
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2.3.10.
SATA Gen 3.0
The COMe-bV26 supports up to two SATA (6 Gb/s) lanes, [SATA_0 and SATA_1]. Alternatively, using a multiplexer IC
two SATA (6 Gb/s) lanes [SATA_2 and SATA_3] may be connected to the COMe pinout.
The following table lists the SATA port connections.
COMe
Connector
GPP lane #
Description
SATA_0
2
SATA GEN 3, 6 Gb/s
SATA_1
3
SATA GEN 3, 6 Gb/s
SATA_2
Mux. to GPP2/SATA_0
SATA GEN 3, 6 Gb/s
SATA_3
Mux. to GPP3/SATA_1
SATA GEN 3, 6 Gb/s
Using a multiplexer IC two SATA signals from the processor may be connected, SATA_0 and
SATA_1 or SATA_2 and SATA_3 to the COMe pinout.
2.3.11.
Ethernet LAN
The COMe-bV26 supports one 10/100/1000Base-T or 2.5 GbE Ethernet controller port.
The following table lists the Ethernet port connections.
COMe
Connector
PCIe Switch Lane #
Description
GBE0
1
up to 2.5 GbE, Intel I225 Ethernet controller
For the 2.5 GbE Ethernet port speed, ensure the use of a compatible connector.
It is not recommended to use an integrated RJ45 connector module with the center tap
shorted together with all the 4 pairs at the center-tap transformer. This increases the
common mode noise and may create EMI. If this type of Integrated Connector module (ICM)
is chosen, it is recommended to add in a discrete common choke in series to each PHY MDI
differential line pairs.
For the COMe-bV26 option without the PCIe Switch, LAN is directly connected to processor
PCIe, see Figure 3: Block Diagram COMe-bV26.
