1-20 Technical Information
System Power Management
NEC Versa system power management consists of the following operation modes. These
modes are:
Active Mode • In active mode, the system uses no power management. It
operates with the default clock speed. The system continues to run at this
speed unless overwritten by the power management features.
Standby Mode • The system switches automatically to Standby mode.
This eliminates unnecessary power consumption when you operate the
system on battery power or AC. Standby mode shuts down the LCD
panel, providing privacy as well as power savings.
Suspend Mode • Suspend mode causes the CPU to power down, local
devices to shut down, and register values to be stored in RAM. System
RAM is put into a slow refresh state.
The system resumes Active mode when you press the Suspend button, or the system is set
to resume at a certain time of day. Suspend mode lets you save power without first saving
the working data.
Press the
Fn-Esc
keys simultaneously 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.
In addition, to quickly activate the Save to File feature, press the
Fn-Power Button
buttons simultaneously. This shuts down the system, and saves the current working data to
a file.
Local Power Management
Use Auto Setup to select one of four power management settings for local devices. These
include Longest Life, Maximum Performance, Customize, and Power Management Off.
The power management levels are also available during AC operation. The NEC Versa
computer ships with Longest Life as the default power management setting. See Section 2
for specific procedures on using Auto Setup to select the power management settings.
When set to Longest Life, CMOS will set local device timeout values, a local standby
timeout value, and a suspend timeout value to ensure the longest battery life. The Maxi-
mum Performance setting selects CMOS values that will provide minimal energy savings
and a shorter battery life. The customize settings enable end-users to set the timeout values
of their choice. The Power Management Off selection terminates all power management
timers.
Local device timers in the system control power consumption in the LCD and Hard Disk
Drive. Table 1-6 shows NEC Versa Series Maximum Performance default power man-
agement timers.
