CARRIER CARD SERIES
VPX4821A XMC/PMC CARRIER
- 7 -
Figure 2: Jumper Diagram
JUMPERS
There are six jumper blocks located on the board. The jumper blocks are
labeled J1, J2, J3, J4, J5, and J6. Within each jumper block there are multiple
jumper settings. A jumper can be used to shout post horizontally and
vertically. The jumper position is OPEN if no jumper is present. The jumper
position is SET if a jumper is present across the two pins. The description for
each jumper is described in the tables that follow.
Bold Selections are the
factory default setting.
For rugged designs all jumpers can be replaced with 0 Ohm resistors. Please
contact the factory for details.
PCIe Lane Configuration
The VPX P1 PCIe lane configuration is selectable via the J1 jumper. Please
note that these strapping settings can be overwritten via a I
2
C write to the
PEX8734.
Table 2-1 PCIe Lane Jumper Configuration
PCIe Lane Configuration
J1 Jumper Configuration
5-6
5-7
6-8
1-2
1-3
2-4
8x-8x
O
S
O
S
O
O
4x-4x-4x-4x
O
O
S
O
O
S
8x-4x-4x
O
O
S
O
S
O
Default setting is 4x-4x-4x-4x with vertical jumbers J1 2-4 and 6-8 set.
The PCIe lane configuration determined the PCIe switch port naming
convention. Use Table 2-2 as a reference when selecting the upstream and
downstream port.