Premio Computer Apollo/Shadowhawk - Manual (Page 60)

Product Description
37
1.13.3 Chassis Intrusion and Detection
The boards support a chassis security feature that detects if the chassis cover is removed. For the
chassis intrusion circuit to function, the chassis’ power supply must be connected to AC power.
The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion
connector. The mechanical switch is closed for normal computer operation.
For information about Refer to
The location of the chassis intrusion connector Figure 12, page 60
The signal names of the chassis intrusion connector Table 33, page 62
✏
NOTE
Chassis intrusion detection may be implemented using third-party software.
1.14 Power Management
Power management is implemented at several levels, including:
• Software support through Advanced Configuration and Power Interface (ACPI)
• Hardware support:
 Power connector
 Fan connectors
 LAN wake capabilities
 Instantly Available PC technology
 Resume on Ring
 Wake from USB
 Wake from PS/2 devices
 Power Management Event (PME#) wake-up support
1.14.1 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 D845HV and D845WN boards 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 (see Table 10 on page 40)
• Support for a front panel power and sleep mode switch.
Table 8 lists the system states based on how long the power switch is pressed, depending on how
ACPI is configured with an ACPI-aware operating system.