Folder On/Off Operation - LG U8130 Service Manual

3. TECHNICAL BRIEF

3.1.10 Folder ON/OFF Operation

There is a magnet to detect the folder status, opened or closed.
If a magnet is close to the hall-effect switch (U1 on keypad), the voltage at pin2 of U1 goes to 0V.
Otherwise, 2.8V.
This folder signal is delivered to MARITA GPIO43.
Figure. Schematic of MARITA IrDA Interface
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