Intel DH77DF Technical Product Specification - Page 57
Alternate Front Panel Power/Sleep LED Header
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Technical Reference 2.2.3.4.2 Reset Switch Header 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 board resets and runs the POST. 2.2.3.4.3 Power/Sleep LED Header Pins 2 and 4 can be connected to a one- or two-color LED. Table 33 shows the possible states for a one-color LED. Table 34 shows the possible states for a two-color LED. Table 33. States for a One-Color Power LED LED State Description Off Steady Green Power off/sleeping Running Table 34. States for a Two-Color Power LED LED State Description Off Steady Green Steady Yellow Power off Running Sleeping NOTE The colors listed in Table 33 and Table 34 are suggested colors only. Actual LED colors are chassis-specific. 2.2.3.4.4 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. 2.2.3.5 Alternate Front Panel Power/Sleep LED Header Pins 1 and 3 of this header duplicate the signals on pins 2 and 4 of the front panel header. Table 35. Alternate Front Panel Power/Sleep LED Header Pin Signal Name 1 POWER_LED_MAIN 2 Key (no pin) 3 POWER_LED_ALT Description [Out] Front panel LED (main color) [Out] Front panel LED (alt color) 57