Intel D845PT Product Specification - Page 73

Front Panel Connector

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Technical Reference 2.8.3.2 Front Panel Connector This section describes the functions of the front panel connector. Table 44 lists the signal names of the front panel connector. Table 44. Front Panel Connector Pin Signal In/Out Description Pin Hard Drive Activity LED 1 HD_PWR Out Hard disk LED 2 pull-up (330 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 No Connect 9 +5 V Out Power 10 11 N/C No connect 12 13 Ground Ground 14 15 N/C No connect 16 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 FPBUT_IN In Power switch Ground Ground Miscellaneous N/C Not connected Ground Ground (pin removed) Not connected +5 V Out Power 2.8.3.2.1 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. The LED will also show activity for devices connected to the SCSI hard drive activity LED connector. For information about The SCSI hard drive activity LED connector Refer to Section 1.8.3.2, page 29 2.8.3.2.2 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 D845BG/D845PT board resets and runs the POST. 2.8.3.2.3 Power/Sleep/Message Waiting LED Connector Pins 2 and 4 can be connected to a one- or two-color LED. Table 45 shows the possible states for a one-color LED. Table 46 shows the possible states for a two-color LED. Table 45. States for a One-Color Power LED LED State Description Off Power off/sleeping Steady Green Running Blinking Green Running/message waiting 73

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Technical Reference
73
2.8.3.2
Front Panel Connector
This section describes the functions of the front panel connector.
Table 44 lists the signal names
of the front panel connector.
Table 44.
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 (330
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
FPBUT_IN
In
Power switch
7
FP_RESET#
In
Reset switch
8
Ground
Ground
No Connect
Miscellaneous
9
+5 V
Out
Power
10
N/C
Not connected
11
N/C
No connect
12
Ground
Ground
13
Ground
Ground
14
(pin removed)
Not connected
15
N/C
No connect
16
+5 V
Out
Power
2.8.3.2.1
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.
The LED will also show activity for devices connected to the SCSI
hard drive activity LED connector.
For information about
Refer to
The SCSI hard drive activity LED connector
Section 1.8.3.2, page 29
2.8.3.2.2
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 D845BG/D845PT board resets and runs the POST.
2.8.3.2.3
Power/Sleep/Message Waiting LED Connector
Pins 2 and 4 can be connected to a one- or two-color LED.
Table 45 shows the possible states for
a one-color LED.
Table 46 shows the possible states for a two-color LED.
Table 45.
States for a One-Color Power LED
LED State
Description
Off
Power off/sleeping
Steady Green
Running
Blinking Green
Running/message waiting