General Description; Operation Modes; Compass Function Main Features; Compass Display Menu - Nokia NPL-4 Series Manual

NPL-4/5/RM-104
System Module and User Interface

General description

Operation modes

• Shutdown
-MagIC is set to stand-by mode
-Logic voltage VIO is always on
Analog voltage supply is normally off, but other functions can switch voltage on
• Active compass function
-External power supply is on
-MagIC is set to active mode
-System clock is activated
• Production test mode
-As active mode but also offset strap current is activated

Compass function main features

Compass display menu

Compass function is controlled via UI SW menu structures. When compass display menu
is selected, it starts compass function.

Compass display results

Compass azimuth result is displayed with heading angle with numerical mode and with
(compass rose) pointer. Measurement is always continuous, only user action can stop
actions.
Other functionality during active compass function:
• Minimal TX RF
• No charging
• Keyboard lights always on (also during calibration)
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