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ASUS C-P55T2D User’s Manual 23
IV. BIOS
(Power Management)
IV. BIOS SOFTWARE
Suspend Switch
This field enables or disables the SMI connector on the motherboard. This connec-
tor connects to the lead from the Suspend switch mounted on the system case. De-
fault setting for this field is Enable.
Doze Speed (div by), Stdby Speed (div by)
These two fields set the CPU speed during each mode. The number indicates what
the normal CPU speed is divided by.
PM Timers
This section controls the time-out settings for the Power Management scheme. The
fields included in this section are “HDD Power Down”, which places the hard disk
into its lowest power consumption mode, and the Doze Mode, Standby Mode and
Suspend Mode.
The system automatically “wakes up” from any power saving mode when there is
system activity such as when a key is pressed from the keyboard, or when there is
activity detected from the enabled IRQ channels.
HDD Power Down shuts down any IDE hard disk drives in the system after a pe-
riod of inactivity. This time period is user-configurable to Disable or from 1 Min to
15 Min. This feature does not affect SCSI hard drives.
The Doze Mode, Standby Mode, and Suspend Mode fields set the period of time
after which each of these modes activate: 30 sec, 1 Min, 2 Min, 4 Min, 8 Min, 20
Min, 30 Min, 40 Min, 1 Hour.
PM Events
This section sets the wake-up call of the system. If activity is detected from any
enabled IRQ channels in the left-hand group, the system wakes up from suspended
mode. You can enable power management for IRQ 3-IRQ15 individually in the list
at the right of the screen. The power management feature will work on the enabled
IRQ channels.
NOTE: A Microsoft serial mouse or compatible will use either COM1 (IRQ4)
or COM2 (IRQ3), and a PS/2 mouse will use IRQ12. If you know which IRQ
your mouse is using, you can enable the wake-up Event for that IRQ here and
the system will wake up when you move the mouse or click its button.
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IRQ3 (device)-IRQ15 (device)
You can individually Enable or Disable each IRQ to include in the sleep function.
IRQ8 (RTC Alarm) is usually set to Disable so that any software alarm clock or
event calendar can wake up the system.