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2.3.12 Sensors
The IT-2000 has the following three types of built-in sensors:
Illumination
sensor
Attached to the upper section of this terminal and used to sense the ambient
light intensity. It is used for the Auto Backlight Control (ABC) function.
It cannot be controlled directly from the application.
(For more information about the system library refer to Chapter 5 “Keyboard
Controller”.)
Temperature
sensor
Attached to the inside of the main unit and used to detect the ambient
temperature. It is used for Automatic Brightness Adjustment (ABA) of the
liquid crystal display. It cannot be controlled directly from the application.
(For more information about the system library refer to Chapter 5 “Keyboard
Controller”.)
Battery voltage
level sensor
Detects the voltage levels of the main battery, sub-batteries, and card
battery. It is used by the system to take action against low battery voltages.
The system manages low voltage through this battery electric potential sensor.
Applications can acquire the information from this battery voltage level
sensor via the system library or APM BIOS.
(Refer to Chapter 2.2.4 “Battery Voltage Monitoring Process”.)