SMART Embedded Computing COMX-CORE-2610-ET, Installation And Use Manual

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Switches
COMX-CORE-2610-ET Installation and Use (6806800P11E) 51
3.3 Switches
Switch S1 can be used to bifurcate processor PCI Express X16 lanes.
3.4 XDP Connectors
COMX-CORE-2610-ET provides a 26-pin SFF XDP connector for user to access the Intel
debug port via a flex cable. It is a 26-pin surface mount Molex* 52435-2671 connector.
Figure 3-3 PCI Express X16 Lanes Bifurcation Configuration Switch
Table 3-4 S1 Switch Configuration
Switch Configuration PCIE Configuration
1-4 open, 2-3 open 1x16 lanes (default)
1-4 open, 2-3 short 2x8 lanes
1-4 short, 2-3 open Reserve
1-4 short, 2-3 short 1x8 + 2x4 lanes
Table 3-5 J1 XDP Debug Port Connector Pin-out
Pin XDP Signal Name Pin XDP Signal Name
1 OBSFN_A0 2 OBSFN_A1
3 GND 4 OBSDATA_A[0]
5 OBSDATA_A[1] 6 GND
7 OBSDATA_A[2] 8 OBSDATA_A[3]
9 GND 10 HOOK0