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H8QM8-2/H8QME-2 User's Manual
ATX PS/2 Keyboard and
PS/2 Mouse Ports
The ATX PS/2 keyboard and the PS/2
mouse ports are located at J3. The
mouse is the top (green) port. See the
table on the right for pin defi nitions.
PS/2 Keyboard and
Mouse Port Pin
Defi nitions (J3)
Pin# Defi nition
1 Data
2NC
3 Ground
4 VCC
5 Clock
6NC
Power LED/Keylock/Speaker
On the JF2 header, pins 2, 4 and 6
are for the power LED, pins 8 and 10
are for the keylock and pins 1, 3, 5
and 7 are for the speaker (there is no
pin 9). See the tables on the right for
pin defi nitions and below right for pin
locations
Note: The speaker connector pins are
for use with an external speaker. If
you wish to use the onboard speaker,
you should close pins 5 and 7 with a
jumper.
Pwr LED/Keylock Connector
Pin Defi nitions (JF2)
Pin# Defi nition
2 +Vcc
4 -Vcc
6 -Vcc
8 Keylock
10 Ground
Speaker Connector
Pin Defi nitions (JF2)
Pin# Defi nition
1 Red wire, speaker data
3NC
5 Buzzer signal
7 Speaker data
Chassis Intrusion
A Chassis Intrusion header is located
at JL1. Attach the appropriate cable
to inform you of a chassis intrusion.
Chassis Intrusion
Pin Defi nitions (JL1)
Pin# Defi nition
1 Intrusion Input
2 Ground
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.
Overheat LED
Pin Defi nitions (JOH1)
Pin# Defi nition
1 +3.3V
2 OH Active