User guide

User Guide • PC1-GROOVE • Core

i7 CompactPCI

CPU Board

Configuration Jumpers

Configuration Switches PCI Express Link Width (DSW1)

The link width of the PCI Express interfaces attached to the PlusIO interface J2/P2 and the local

expansion connector P-PCIE is configurable by two DIP switches (DSW1) located on the backside of

the PC1-GROOVE. Note that changes in PCIe link width configuration are honoured by the

PC1-GROOVE not before a system reset was performed.

DSW1 PCIe Link Width

12PCIe Switch

Upstream

J2/P2 (PlusIO) J-PCIE

OFF OFF 4 Lanes 1 Link x 4 Lanes 1 Link x 4 Lanes

ON OFF 4 Lanes 4 Links x 1 Lane 1 Link x 4 Lanes

OFF ON 4 Lanes 4 Links x 1 Lane 4 Links x 1 Lane

1 Lane 4 Links x 1 Lane 4 Links x 1 Lane

This setting is not useful and should not be used.

When a port is configured as single link, the PCIe switch may size down the link width to x2 or x1 by

auto-negotiation.

The following table shows the factory settings of DSW1 with different side boards mounted to the

PC1-GROOVE:

Side Board DSW1 PCIe Link Width

1 2 Upstream J2/P2 (PlusIO) J-PCIE

None OFF ON 4 Lanes 4 Links x 1 Lane 4 Links x 1 Lane

C23-SATA OFF ON 4 Lanes 4 Links x 1 Lane 4 Links x 1 Lane

CCI-RAP OFF ON 4 Lanes 4 Links x 1 Lane 4 Links x 1 Lane

CCJ-RHYTHM ON OFF 4 Lanes 4 Links x 1 Lane 1 Link x 4 Lanes

CCK-MARIMBA ON OFF 4 Lanes 4 Links x 1 Lane 1 Link x 4 Lanes

CCL-CAPELLA ON OFF 4 Lanes 4 Links x 1 Lane 1 Link x 4 Lanes

CCO-CONCERT OFF ON 4 Lanes 4 Links x 1 Lane 4 Links x 1 Lane

160.15.02.0

DSW1