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3. TECHNICAL BRIEF
3.13 Headset Jack Interface
3-pole type ear-mic jack which has three electrodes such as Receiver+, Mic+, and GND.
This type usually supports only single-ended configuration (VOUTAUXP for headset speaker
and VINAUXP for headset mic) in the audio path.
There are two control signals for jack interface. One is JACK_DETECT which is for detecting the
headset jack and the other is HOOK_DETECT which is enabled when hook of the headset is
pressed. The pins (JACK_DETECT and HOOK_DETECT) interfaces with AD6525.
U204
VIN- 4
VIN+
C226
39p
MAX9075EXK-T
5
0
1
VCC
JACK_DETECT
GND
OUT
3
R220
2
HEADSET_SPK_P
R225
0
HEADSET_MIC_P
R213
AUXIN
0
AUXIP
Figure 3-20. Circuit Diagram of Headset Interface.
(1608)
C227
10u
R224
4.7
R226
4.7
C229
C243
C230
C242
47p
NA
47p
NA
C223
C251
C224
10u
10u
39p
U203
VIN-
4
VIN+ 3
HEADSET_MIC_P
- 34 -
C244
NA
Headset jack
C225
39p
MAX9075EXK-T
5
VCC
1
HOOK_DETECT
GND OUT
2
5
1
3
4
2
J200
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