Intel D845GLVA Product Specification - Page 55

Front Panel Connector

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Technical Reference 2.8.3.1 Front Panel Connector This section describes the functions of the front panel connector. Table 30 lists the signal names of the front panel connector. Figure 8 is a connection diagram for the front panel connector. Table 30. Front Panel Connector Pin Signal In/Out Description Pin Hard Drive Activity LED 1 HD_PWR Out Hard disk LED pull-up 2 (750 Ω) to +5 V 3 HAD# Out Hard disk active LED 4 Reset Switch 5 Ground Ground 6 7 FP_RESET# In Reset switch 8 9 +5 V Out Power 10 Signal In/Out Description Power LED HDR_BLNK_ Out GRN Front panel green LED HDR_BLNK_ Out YEL Front panel yellow LED On/Off Switch SWITCH_ON# In Power switch Ground Ground No connect Not connected Hard Drive Activity LED + − Reset Switch 12 34 56 78 +5 V DC 9 Single-colored Power LED + − Dual-colored Power LED − + Power Switch N/C OM15964 Figure 8. Connection Diagram for Front Panel Connector 2.8.3.1.1 Hard Drive Activity LED Connector Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being read from or written to a hard drive. For the LED to function properly, an IDE drive must be connected to the onboard IDE interface. 2.8.3.1.2 Reset Switch Connector Pins 5 and 7 can be connected to a momentary SPST type switch that is normally open. When the switch is closed, the Desktop Board resets and runs the POST. 2.8.3.1.3 Power/Sleep/Message Waiting LED Connector Pins 2 and 4 can be connected to a one- or two-color LED. Table 31 shows the possible states for a one-color LED. Table 32 shows the possible states for a two-color LED. 55

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Technical Reference
55
2.8.3.1
Front Panel Connector
This section describes the functions of the front panel connector. Table 30 lists the signal names of
the front panel connector. Figure 8 is a connection diagram for the front panel connector.
Table 30.
Front Panel Connector
Pin
Signal
In/Out
Description
Pin
Signal
In/Out
Description
Hard Drive Activity LED
Power LED
1
HD_PWR
Out
Hard disk LED pull-up
(750
Ω
) to +5 V
2
HDR_BLNK_
GRN
Out
Front panel green
LED
3
HAD#
Out
Hard disk active LED
4
HDR_BLNK_
YEL
Out
Front panel yellow
LED
Reset Switch
On/Off Switch
5
Ground
Ground
6
SWITCH_ON#
In
Power switch
7
FP_RESET#
In
Reset switch
8
Ground
Ground
9
+5 V
Out
Power
10
No connect
Not connected
Single-colored
Power LED
+
−
OM15964
8
6
4
2
9
7
5
3
1
Hard Drive
Activity LED
Reset
Switch
+5 V DC
N/C
Power
Switch
−
+
Dual-colored
Power LED
−
+
Figure 8. Connection Diagram for Front Panel Connector
2.8.3.1.1
Hard Drive Activity LED Connector
Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being read from
or written to a hard drive. For the LED to function properly, an IDE drive must be connected to the
onboard IDE interface.
2.8.3.1.2
Reset Switch Connector
Pins 5 and 7 can be connected to a momentary SPST type switch that is normally open. When the
switch is closed, the Desktop Board resets and runs the POST.
2.8.3.1.3
Power/Sleep/Message Waiting LED Connector
Pins 2 and 4 can be connected to a one- or two-color LED. Table 31 shows the possible states for a
one-color LED. Table 32 shows the possible states for a two-color LED.