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Technical Reference

2.8.3.2 Front Panel Connector

This section describes the functions of the front panel connector. Table 46 lists the signal names

of the front panel connector.

Table 46. Front Panel Connector (J9D2)

Pin Signal In/Out Description Pin Signal In/Out Description

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

5 GND Ground 6 FPBUT_IN In Power switch

7 FP_RESET# In Reset switch 8 GND Ground

9 +5 V Out IR Power 10 N/C

11 Reserved In Reserved 12 GND Ground

13 GND Ground 14 (pin removed) Not connected

15 Reserved Out Reserved 16 +5 V Out Power

2.8.3.2.1 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 D850GB board resets and runs the POST.

2.8.3.2.2 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 0, page 25

2.8.3.2.3 Power/Sleep/Message Waiting LED Connector

Pins 2 and 4 can be connected to a one- or two-colored LED. Table 47 shows the possible states

for a one-colored LED. Table 48 shows the possible states for a two-colored LED.

Table 47. States for a One Color Power LED

LED State Description

Off Power off/sleeping

Steady Green Running

Blinking Green Running/message waiting

Intel D850GB User Manual

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