Pentek Model 78661 Installation Manual
Page 19
Rev.: 1.7
2.8
PCIe Carrier Switches
This section describes operating parameters that are set by DIP switches on the Model
7806 carrier PCB. See
for location of these switches on the PCB.
for the jumper settings on the carrier PCB.
As shipped from the factory, all switches on the carrier PCB have been factory set for
the configuration shipped. The default parameters they select may or may not meet
your requirements. Before installing your 78661 assembly onto a PCIe baseboard,
review the following table to determine whether you need to change any of these set−
tings.
Switch
SW1
selects XMC interface modes for the XMC module. The following table
describes the different mode selections for each switch position.
Table 2
−
9: XMC Modes
−
Switch SW1
Switch
OFF Function
ON Function
Description
SW1
−
1
GA0 is pulled to 3.3V on
the XMC connector *
Ties GA0 to GND on the
XMC connector
Sets bit 0 of the XMC onboard
EEPROM base address
SW1
−
2
GA1 is pulled to 3.3V on
the XMC connector *
Ties GA1 to GND on the
XMC connector
Sets bit 1 of the XMC onboard
EEPROM base address
SW1
−
3
GA2 is pulled to 3.3V on
the XMC connector *
Ties GA2 to GND on the
XMC connector
Sets bit 2 of the XMC onboard
EEPROM base address
SW1
−
4
MVMRO is pulled to 3.3V
on the XMC connector *
Ties MVMRO on the
XMC connector to GND
When MVMRO is pulled high to 3.3V,
the XMC onboard EEPROM cannot
be written to.
SW1
−
5
ROOT0 is pulled to 3.3V
on the XMC connector *
Ties ROOT0 on the XMC
connector to GND
When ROOT0 is pulled to GND, the
XMC card can function as a root
complex and assign base addresses
to other devices on the PCI express
and PCI buses
SW1
−
6
SHUTDOWN_12V_N
is
pulled to 3.3V *
Ties
SHUTDOWN_12V_N
to
GND
When
SHUTDOWN_12V_N
is pulled to
GND, the
−
12V XMC power supply is
shut down
SW1
−
7
Not used
SW1
−
8
Not used
* Factory Default Setting
−
all Switches OFF
