System Power Management; Local Power Management; Plug And Play - NEC VERSA 2600 Service Manual

System Power Management

The system power management consists of the following operation modes. These modes
are:
T
Active Mode
with the default clock speed. The system continues to run at this speed unless
overwritten by the power management features.
T
Standby Mode
eliminates unnecessary power consumption when you operate the system on bat-
tery power or AC. Standby mode shuts down the LCD panel, providing privacy as
well as power savings.
T
Suspend Mode
shut down, and register values to be stored in RAM.
The system resumes Active mode when you press the Power button or the system
is set to resume at a certain time of day. Suspend mode lets you save power with-
out first saving the working data.
Press the Power button to enter Suspend mode when you need to be away from
the system for a short period of time and want to return to where you left off.

Local Power Management

Use Auto Setup to select one of four power management settings for local devices. These
include Maximum Battery Life, Good Battery Life, Good Performance, and Maximum
Performance. The power management levels are also available during AC operation. The
NEC Versa computer ships with Longest Battery Life as the default power management
setting. See Section 2 for specific procedures on using Auto Setup to select the power man-
agement settings.
When set to Maximum Battery Life, CMOS will set local device timeout values, a local
stand-by timeout value, and a suspend timeout value to ensure the longest battery life. The
Maximum Performance setting selects CMOS values that will provide minimal energy sav-
ings and a shorter battery life. The custom settings enable end-users to set the timeout val-
ues of their choice.

PLUG AND PLAY

The NEC Versa features Plug and Play functionality. Plug and Play is the ability of the
BIOS and/or operating system to dynamically assign system resources to a newly installed
device without user intervention.
For example, you can suspend the system, add an external keyboard, mouse, or monitor,
and when you resume working, the NEC Versa recognizes the devices that have been con-
nected to it. Similarly, you can remove external devices in Suspend mode and the NEC
Versa detects the status when resumed.
In active mode, the system uses maximum power. It operates
The system switches automatically to Standby mode. This
Suspend mode causes the CPU power down, local devices to
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