Table of Contents
Advertisement
CLIO Service Manual
CLIO will suspend after the set amount of time (also customizable using the Power Manager
Control Panel applet).
Tablet Power
Options
Automatic
Manual
1.17.
T
ABLET MODE ACTIONS
The tablet mode options allow the user to control what application (if any) gets invoked when
the screen is placed in tablet mode. The default is to enable the CIC virtual keyboard and Jot
handwriting recognition application when the unit is placed in tablet mode.
1.17.1.
I
MPLEMENTATION
This section describes specific implementation details and presents the specific drivers that
support the above functions as well as defines the registry entries associated with the Cover
Closed and Tablet Mode switch handling.
1.17.1.1. P
ON
OWER
One of the user options for the Cover Closed switch is to not affect the power state when
going from Tablet Mode to Laptop Mode. Implementation of this feature requires some
special support in the driver.
In the CLIO hardware, the Cover Closed Switch is tied to a Vr4111 power event pin; the act
of lifting the cover from tablet mode sets a power-on interrupt, which the Vr4111 services. If
power was OFF to the CLIO and the user had selected the Manual option for the Tablet
Power Option (see section 1.16.2), then the power should remain OFF. In order to do this,
the driver servicing the Cover Closed Switch (or the call to the driver that turns on System
Power) checks for this condition and immediately turns OFF the system power prior to
enabling the display. This will give the impression to the user that the power never really
turned on, even though it did.
There is one tricky part to implementing the above. When the user lifts the cover from Tablet
mode to Laptop mode, the Tablet Mode switch will go inactive. Therefore, the driver cannot
check the Tablet Mode switch to know if the cover is being opened from the Closed Laptop
Mode or from the Tablet Mode. To solve this, the routine handling the Tablet Mode switch
records the Tablet Switch state whenever it changes. Basically, this driver is implemented as
a state machine.
1.17.1.2. C
P
ONTROL
The Tablet Control Panel applet allows the user to change the default application(s) invoked
when the CLIO enters Tablet mode or to turn off of auto-invoke feature entirely.
The information contained in this document is confidential and the sole property of Vadem Inc. Written
permission must be obtained to reprint or use any of this information.
AUTHORED BY ANTHONY HERNANDEZ - (415)786-2081 - anthonyh@ashlandhome.net
Description
If power is OFF, transitioning from Closed to
Laptop mode will turn ON system power.
Laptop mode to Tablet mode has no effect.
Going from Closed mode to Laptop mode and
vise-versa does not affect system power
T
CONSIDERATIONS IN
ABLET TO
S
ANEL
UPPORT
1-15
Theory of Operation
L
APTOP MODE
Advertisement
Table of Contents
