Only For Training And Service Purposes - LG KS10 Service Manual

3. TECHNICAL BRIEF
3.9.2. 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 U402 goes to 0V. Otherwise, 2.7V. This folder signal is delivered to
GPIO0 of the Key coder IC .
FOLDER_DETECT
LGE Internal Use Only
C413
1u
Figure. Schematic of folder on/off detection circuit
R413
100K
U402 A3212EEH-T
1
OUTPUT VDD
2
NC1 NC2
GND2
3
GND1 PGND
EUSY0200301
Copyright © 2007 LG Electronics. Inc. All right reserved.
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AP_VDD_IO_2.7V
6
5
C414
4
0.1u
7

Only for training and service purposes