MAXDATA FUSION 6000 I, Системное руководство

Страница: 20 / 31

20
Description
Wake on LAN Technology
Network adapters that are PCI 2.2 compliant assert the wake-up signal using the PCI bus
signal PME# (pin A19 on the PCI bus connectors).
CAUTION
For Wake on LAN technology, the 5 V standby line for the power supply must be capable of
providing ad5 V standby current. Failure to provide adequate standby current when
implementing Wake on LAN technology can damage the power supply.
CAUTION
If the standby current necessary to support multiple wake events from the PCI and/or USB
buses exceeds power supply capacity, the system board may lose register settings stored
in memory, etc.
Wake on Ring
The operation of Wake on Ring can be summarized as follows:
• Powers up the system from the ACPI S5 state.
• Modem must support PME.
• Requires two calls to access the system:
− The first call powers up the system
− The second call enables access (when the appropriate software is loaded)
• For external modems, hardware on the system board monitors the ring indicate (RI) input
of the serial port.
Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from the ACPI S1.
• Requires only one call to access the system.
• Detects incoming call similarly for external and internal modems; does not use the Wake
on Ring connector.
• Requires modem interrupt be unmasked for correct operation.
ACPI
ACPI gives the operating system direct control over the power management and Plug and
Play functions of a computer. The use of ACPI with the MAXDATA Fusion 6000 System
board requires an operating system that provides full ACPI support. ACPI features include:
• Plug and Play (including bus and device enumeration)
• Power management control of individual devices, add-in boards (some add-in boards
may require an ACPI-aware driver), video displays, and hard disk drives
• Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state
• A Soft-off feature that enables the operating system to power-off the computer
• Support for multiple wake-up events
• Support for a front panel power and sleep mode switch
Table 5 lists the system states based on how long the power switch is pressed, depending
on how ACPI is confi gured with an ACPI-aware operating system.