E3C246D4I-2T
22
23
English
Serial Port Header
(9-pin COM1)
(see p.6, No. 22)
CCTS#1
RRTS#1
DDSR#1
DDTR#1
RRXD1
GND
TTXD1
DDCD#1
1
RRI#1
This COM header supports a
serial port module.
Clear CMOS Pad
(CLRMOS1)
(see p.6, No. 7)
CLRMOS1 allows you to clear
the data in CMOS. To clear
CMOS, take out the CMOS
battery and short the Clear
CMOS Pad.
PSU SMBus
(PSU_SMB1)
(see p.6, No. 5)
+3VSB
1
ALERT
SMBCLK
GND
SMBDATA
PSU SMBus monitors the
status of the power supply, fan
and system temperature.
Intelligent Platform
Management Bus Header
(4-pin IPMB1)
(see p.6, No. 21)
IPMB_SDA
IPMB_SCL
GND
No connect
This 4-pin connector is used
to provide a cabled base-board
or front panel connection for
value added features and 3rd-
party add-in cards, such as
Emergency Management cards,
that provide management
features using the IPMB.
Baseboard Management
Controller SMBus Header
(5-pin BMC_SMB_1)
(see p.6, No. 20)
BMC_SMB_PRESENT_1_N
Power
BMC_SMBCLK
GND
BMC_SMBDATA
1
The header is used for the SM
BUS devices.
NCSI Header
(9-pin NCSI1)
(see p.6, No. 27)
TX Enable
1
TXD0
TXD1
GND
CLK_IN
CRS_DV
RXD0
RXD1
GND
The onboard NCSI header is
used for external connections.
