Configuration Jumpers; Configuration Pci Express Switch (Ds-P) - EKF SC2-PRESTO CompactPCI User Manual

User Guide • SC2-PRESTO • CompactPCI
GPIO Type Voltage
68-71 I +V3.3S
72 I +V3.3A
73 I +V3.3A
74-75 I +V3.3A
1)
S=Core Voltage (active in state S0 only), A=Standby Voltage

Configuration Jumpers

Configuration PCI Express Switch (DS-P)

The link width and transfer rate of the PCI Express interfaces attached to the local expansion
connector P-PCIE is configurable by two DIP switches (DS-P) located on the backside of the
SC2-PRESTO. Note that changes in PCIe link configuration are honoured by the board not before a
system reset was performed.
DS-P
1 2
OFF OFF
ON OFF
OFF ON
ON ON
1)
Consists to the non fat pipe slots, generally periphery slots 3 to 8.
When the port on P-PCIE is configured as single link, the PCIe switch may size down the link width to
x2 or x1 by auto-negotiation.
© EKF
GPIO Usage QM87 PCH
1)
Function
BOARD_CFG
N/A
PCIE_CLK_REQ0#
N/A
PCIe Switch
Upstream
4 Lanes @ 5GT/s 6 Links x 1 Lane @ 5GT/s
4 Lanes @ 5GT/s 6 Links x 1 Lane @ 5GT/s
4 Lanes @ 2.5GT/s 6 Links x 1 Lane @ 2.5GT/s
4 Lanes @ 2.5GT/s 6 Links x 1 Lane @ 2.5GT/s
®
Serial CPU Board • Intel® Core
Board Configuration Jumpers BOARD_CGF[0:3]
Not used on SC2 (pulled via resistor to +3.3V)
Ethernet Controller NC1 Clock Request
Not used on SC2 (pulled via resistors to +3.3V)
ON
1
2
DS-P
PCIe Link Width
1)
CPCI Serial
-57-
TM
4xxx Processor
Description
P-PCIE
4 Links x 1 Lane @ 5GT/s
1 Link x 4 Lanes @ 5GT/s
4 Links x 1 Lane @ 2.5GT/s
1 Link x 4 Lanes @ 2.5GT/s
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