Casio DT-X7 Series Software Manual page 137

2.8.8 Virtual OFF by System
The "Virtual OFF" explained in Chapter 2.8.7 and adopted in many years in the CASIO previous
models is controlled by application. The DT-X7 and new models in future will support a new
virtual off mode - Virtual OFF by the System. The Virtual OFF by application is set in ON state of
the ordinary condition and is controlled by the System Library in application.
In Figure 2.16, the application enables the "Virtual OFF by System" with Microsoft's
SysSetSystemManagedVirtualOffMode function. Once the mode is set effect, the system
alternately changes ON and OFF states of the Virtual OFF mode every time the user presses the
Power key. That is to say, each device driver can automatically go into the pre-determined device
state. The "Virtual OFF by System" can be reset by a reset operation.
Transition of Power Management (for application)
With
SetSystemManagedVirtualOffMode
(Enable)
Figure 2.16
In Figure 2.16, if the application receives the low battery warning message
(PBT_APMBATTERYLOW), the application should reset the Virtual OFF mode and warn the
user of low battery. If the user continues to operate the terminal ignoring resetting the Virtual OFF
mode, turning off the power will occur (ordinal process to turn off the power) due to low voltage
of the battery. This causes a confusion and makes the user unable to judge whether the terminal
cannot resume from the Virtual OFF mode or troublesome caused by the battery ran out.
Power SW/VDET2/BCVR
ON
With SetSystemManagedVirtualOffMode (Disable)
Power SW/APO/SysPowerOff
SYS VOFF
ON State
(VON)
Power SW
The system makes the transition occur.
Power SW
With SetSystemManagedVirtualOffMode (Disable)
SYS VOFF
OFF State
(VOFF)
Power SW
VDET2/BCVR
OFF
137
Ordinary State
(including
Virtual OFF by
OFF
application)
When
"Virtual OFF
VDET2/BCVR
by System" is
set effect.