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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
This phone has 6 electrodes for headset interface, such as GND, AUXIP, AUXIN, HS_OUT_L, HS_OUT_R,
JACK_DETECT and ACC_DET.
Switching from Receiver to Headset Jack
If jack is inserted, JACK_DETECT goes from high to low.
Audio path is switched from receiver to earphone by JACK_DETECT interrupt.
Switching from Headset Jack to Receiver
If jack is removed, JACK_DETECT goes from low to high.
Audio path is switched from earphone to receiver by JACK_DETECT interrupt.
Hook detection
If hook-button is pressed, ACC_DET is changed from high to low.
This is detected by ACC_DETECT of AD6726
And then hook is detected.
3.11 Headset Interface
Figure 3.11 HEADSET JACK INTERFACE
R31320
27p
C331
R306
1.5K
2V5_VMIC
C326 0.1u
0.1uC325
C337
100p
10u
C332
27p
C330
R309
2.2K
ACC_DET
HS_MIC
AUXIN
AUXIP
ENRY0006801
C315
33p
C320
4.7u
FB303
FB301
C316
33p
C314
100p
C322
47p
VCHG_IN
2V8_VEXT
FB300
20
R304
R302 100K
R301 100K
15
16
17
18
19
2
20
21
22
3
4
5
6
7
8
9
CN300
GU041-18P-E1000
1
10
11
12
13
14
100KR300
C318
1u
VBAT
FB302
C317
47p
R305
47
C323
1u
C321
330p
VBUS_IN
HS_OUT_R
HS_OUT_L
HS_MIC
USBDM
RPWRON
USC2
JACK_DETECT
USC1
DSR
USBDP
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