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Serial Port Header
(9-pin COM1)
(see p.6, No. 21)
Backplane PCI Express
Hot-Plug Connector
(5-pin CPU1_HSBP1)
(see p.6, No. 9)
Thermal Sensor Header
(3-pin TR1)
(see p.6, No. 20)
Clear CMOS Pads
(CLRMOS1)
(see p.6, No. 23)
20
DDCD#1
TTXD1
GND
RRTS#1
RRI#1
1
CCTS#1
DDSR#1
DDTR#1
RRXD1
1
GND
P0_HP_ALERT_L
CPU_HP_SDA
CPU_HP_SCL
+3V
TR1
TR1
1
GND
This COM header supports a
serial port module.
This header is used for the hot
plug feature of HDDs on the
backplane.
Please connect the thermal
sensor cable to either pin 1-2
or pin 2-3 and the other end to
the device which you wish to
monitor its temperature.
This allows you to clear the
data in CMOS. To clear CMOS,
take out the CMOS battery and
short the Clear CMOS Pad.
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