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H8DC8/H8DCi User's Manual
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 at J101. The
mouse is the top (green) port. See the
table on the right for pin defi nitions.
Chassis Intrusion
A Chassis Intrusion header is located
at JL1. Attach the appropriate cable
to inform you of a chassis intrusion.
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.
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
Defi nitions (J101)
Pin#
Defi nition
1
Data
2
NC
3
Ground
4
VCC
5
Clock
6
NC
Chassis Intrusion
Pin Defi nitions (JL1)
Pin#
Defi nition
1
Battery voltage
2
Intrusion signal
Overheat LED
Pin Defi nitions (JOH1)
Pin#
Defi nition
1
3.3V
2
OH Active
2-12
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