LG KG920 - Headset Interface

3. TECHNICAL BRIEF
- 70 -
3.14 Headset Interface
Headset connector has 12pins function, Differential Microphone input, Stereo Single-Ended Receiver
Output and four function key buttons.
Microphone input is connected to AIN2P/AIN2N and Stereo Output is connected to AOUT3L/AOUT3R.
(MP3_PLAY/PAUSE)
(HOOK_DETECT)
(MP3_FF)
(MP3_REW)
680R414
EVLC18S02015
VA409 VA410
EVLC18S02015
100R413
14
2
3
4
5
6
7
8
9
CN401
1
10
11
12
13
100R410
100R411
R409 100
EVLC18S02015
VA407 VA406
EVLC18S02015
VA408
EVLC18S02015
KEY_ROW0
KEY_COL5
KEY_COL4
KEY_COL3
KEY_COL2
Figure 3-35.
(GPIO_9)
EVL5M02200
VA404
VA401
EVL5M02200
4.7R408
C401
10u
100R405
C409
47p
VA403
EVL5M02200
2V8_VMEM
14
2
3
4
5
6
7
8
9
CN401
1
10
11
12
13
R406 4.7
39p
C402
1K
R401
0.1uC403
C410
47p
R402
100K
100R404
47p
C407 C408
1u
100R431
VA405
EVL5M02200
R403
2.2K
EVL5M02200
VA402
C406
1u
2V5_VMIC
2.2K
R412
JACK_DETECT
AUX_MIC_N
AUX_MIC_P