LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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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 .
AP_VDD_IO_2.7V
0.1u
C414
U402
A3212EEH-T
3
GND1
GND2
4
2
NC1
5
NC2
1
OUTPUT
7
PGND
6
VDD
EUSY0200301
R413
100K
C413
1u
ZD1
RSB6.8CST2R
FOLDER_DETECT
Figure. Schematic of folder on/off detection circuit
Содержание KS10
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