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X8DTT/-F/-IBX/-IBXF/-IBQ/-IBQF User's Manual
Unit Identifi er Switches
Two Unit Identifi er (UID) Switches and LED
Indicators are located on the motherboard. The
Front Panel UID Switch is located at Pin 13 on
the Front Control Panel (JF1). The Rear UID
Switch is located at SW1 next to the Infi niBand
Connector. The Front Panel UID LED is located
at Pin 7 of JF1, and the Rear UID LED is lo-
cated at LE4. When you press a UID switch on
the front panel or on the back panel, both Rear
UID LED and Front Panel UID LED Indicators
will be turned on. Press the UID switch again to
turn off both LED Indicators. These UID Indica-
tors provide easy identifi cation of a system unit
that may be in need of service. See the table
on the right for pin defi nitions.
Note
: UID LED is supported by the
physical switch or the BMC. When it
is controlled by the physical switch, it
will stay solid. When it is controlled by
the BMC, it will blink.
UID Switch
Pin# Defi nition
1
Ground
2
Ground
3
Button In
4
Ground
X8DTT Series
Rev. 2.0
1
1. UID Switch
2. FP UID Switch & UID LED
1
2
