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Serial Ports
Two serial ports are included on the
motherboard: COM1 is located on the
I/O backpanel and COM2 is a header
(located near the onboard buzzer) for
front access support. See the table on
the right for pin defi nitions.
2
Power SMB (I
C) Connector
Power System Management Bus (I
Connector (JPI
2
C1) monitors power
supply, fan and system temperatures.
See the table on the right for pin
defi nitions.
Onboard Speaker (SP1)
The onboard speaker provides au-
dible indications for various beep
codes. See the table on the right for
pin defi nitions.
Power LED/Speaker
On JD1 header, pins 1-3 are used
for power LED indication, and pins
4-7 are for the speaker. Connect pins
(4-7) of JD1 with a cable to use the
external speaker. If you wish to use
the onboard speaker, close pins 6-7
with a jumper (Default). See the tables
on the right for pin defi nitions.
Chapter 5: Advanced Motherboard Setup
Serial Port Pin Defi nitions
Pin #
Defi nition
1
DCD
2
RXD
3
TXD
4
DTR
5
Ground
Note: Pin 10 is included on the header but not on
the port. NC indicates no connection.
Pin Defi nitions
Pin#
2
C)
1
2
3
4
5
Internal Buzzer
Pin Defi nition
Pin#
Pin 1
Pos. (+)
Pin 2
Neg. (-)
PWR LED Connector
Pin Defi nitions
Pin Setting
Pin 1
Pin2
Pin3
Speaker Connector
Pin Settings
Pin Setting
Pins 4-7
External Speaker
Pins 6-7
Internal Speaker (Default)
5-13
Pin #
Defi nition
6
DSR
7
RTS
8
CTS
9
RI
10
NC
PWR SMB
Defi nition
Clock
Data
PWR Fail
Ground
+3.3V
Defi nitions
Beep In
Alarm
Speaker
Defi nition
Anode (+)
Cathode (-)
NA
Defi nition
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