Specification Sheet

48
2.2.4.5.3 Power/Sleep LED Header
Pins 2 and 4 can be connected to a one- or two-color LED. Table 23 and Table 24 show the
possible LED states.
Table 23. States for a One-Color Power LED
LED State
Description
Off
Power off
Blinking
Standby
Steady Normal operation
Table 24. States for a Dual-Color Power LED
LED State
Description
Off Power off
Secondary color blinking
(amber)
Standby
Primary color steady (blue)
Normal operation
NOTE
The LED behavior shown in Table 23 is default – other patterns may be set via BIOS setup.
2.2.4.5.4 Power Switch Header
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 board.) At least two
seconds must pass before the power supply will recognize another on/off signal.
2.2.4.5.5 5V DC Power Header
Pin 6 can supply 2A of 5V DC (VCC) power. Any usage of power from this header should be
considered when calculating the system’s total power budget.
For information about
Refer to
Power supply considerations
Section 2.5.1, page 53