SPEAKER

The external speaker provides error beep code information during the Power-On Self Test if the system cannot use the video interface. If no speakers are plugged into the audio output jack, the audio output is redirected to the external PC speaker.

SLEEP / RESUME

When Advanced Power Management (APM) is activated in the system BIOS and the operating system’s APM driver is loaded, Sleep mode (Stand-By) can be entered in one of three ways: an optional front panel “Sleep/Resume” button, a user defined keyboard hot key, or prolonged system inactivity. The Sleep/Resume button is supported by a 2-pin header located on the front panel I/O connector. Closing the “Sleep” switch will generate an SMI (System Management Interrupt) to the processor which immediately goes into System Management Mode (SMM), the so called “Sleep” mode. The front panel “Sleep mode” switch must be a momentary two pin SPST type that is normally open. The function of the Sleep/Resume button can also be achieved via a keyboard hot-key sequence, or by a time-out of the system inactivity timer. Both the keyboard hot-key and the inactivity timer are programmable in the BIOS setup (timer is set to 10 minutes by default). To re-activate the system, or “Resume”, the user must simply press the sleep/resume button again, or use the keyboard or mouse. Note that mouse activity will only “wake up” the system if a mouse driver is loaded. While the system is in Stand-By or “sleep” mode it is fully capable of responding to and servicing external interrupts (such as incoming fax) even though the monitor will only turn on if a user interrupt (keyboard/mouse) occurs as mentioned above. This interface is also supported by pins 1 and 2 of the PS SLEEP connector.

INFRA-RED (IRDA) CONNECTOR

Serial port 2 can be configured to support an IrDA module via a 5 pin header connector . Once configured for IrDA, the user can transfer files to or from portable devices such as laptop computers, PDA’s or printers using application software such as Traveling Software’s LapLink. The IrDA specification provides for data transfers at 115 Kbps from a distance of 1 meter.

RESET

This 2-pin header can be connected to a momentary SPST type switch that is normally open. When the switch is closed, the system will hard reset and run POST.

Advanced/RH Technical Product Specification Page 17

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Intel 281809-003 manual Speaker, Sleep / Resume, INFRA-RED Irda Connector, Reset

281809-003 specifications

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