States For A One-Color Power Led; States For A Two-Color Power Led; Auxiliary Front Panel Power/Sleep/Message-Waiting Led Connector - Intel D845PEBT2 Specification

2.8.3.1.2 Reset Switch Connector
Pins 5 and 7 can be connected to a momentary single pole, single throw (SPST) type switch that is
normally open. When the switch is closed, the Desktop Board D845PEBT2 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 49 shows the possible states for
a one-color LED. Table 50 shows the possible states for a two-color LED.
Table 49.

States for a One-Color Power LED

LED State
Off
Steady Green
Blinking Green
Table 50.

States for a Two-Color Power LED

LED State
Off
Steady Green
Blinking Green
Steady Yellow
Blinking Yellow
✏
NOTE
To use the message waiting function, ACPI must be enabled in the operating system and a
message-capturing application must be invoked.
2.8.3.1.4 Power Switch Connector
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch must
pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off.
(The time requirement is due to internal debounce circuitry on the Desktop Board D845PEBT2.)
At least two seconds must pass before the power supply will recognize another on/off signal.
2.8.3.2

Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector

Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 51. Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector
Pin Signal Name
1 HDR_BLNK_GRN
2 Not connected
3 HDR_BLNK_YEL
Description
Power off/sleeping
Running
Running/message waiting
Description
Power off
Running
Running/message waiting
Sleeping
Sleeping/message waiting
In/Out
Out
Out
Technical Reference
Description
Front panel green LED
Front panel yellow LED
71