3. TECHNICAL BRIEF
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3.10.6 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, the voltage at pin1 of U901 goes to 0V.
Otherwise, 2.7V.
This folder signal is delivered to MSM6275 GPIO43.
Figure. Schematic of folder on/off detection circuit