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Power LED/Speaker
On JD1, pins 1, 2, and 3 are for the
power LED and pins 4 through 7 are
for the speaker. See the tables on the
right for pin defi nitions.
Note: The speaker connector pins are
for use with an external speaker. If
you wish to use the onboard speaker,
you should close pins 6 and 7 with a
jumper.
ATX PS/2 Keyboard and
PS/2 Mouse Ports
The ATX PS/2 keyboard and the
PS/2 mouse ports are located on the
backplane. The mouse is the green
port. See the table on the right for
pin defi nitions.
Overheat LED
Connect an LED to the JOH1 header
to provide warning of chassis over-
heating. See the table on the right for
pin defi nitions.
PS_SMBUS
The PS_SMBUS header is for I
which may be used to monitor the
status of the power supply, fans and
system temperature. See the table on
the right for pin defi nitions.
PWR LED Connector
Pin Defi nitions (JD1)
Pin#
Defi nition
1
+Vcc
2
Control
3
Control
Speaker Connector
Pin Defi nitions (JD1)
Pin#
Defi nition
4
Red wire, +5V
5
No connection
6
Buzzer signal
7
Speaker data
PS/2 Keyboard and
Mouse Port Pin
Pin#
1
2
3
4
5
6
Overheat LED
Pin Defi nitions (JOH1)
Pin#
1
2
Pin Defi nitions
(PS_SMBUS)
Pin#
2
C,
1
2
3
4
5
2-13
Chapter 2: Installation
Defi nitions
Defi nition
Data
NC
Ground
VCC
Clock
NC
Defi nition
3.3V
OH Active
I
2
C Header
Defi nition
Clock
Data
PWR Fail
Gnd
+3.3V
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