3. TECHNICAL BRIEF
- 46 -
3.12 Headset Interface
This phone chooses a 5 pin type headset which has 6 electrodes such as GND, AUXIP, AUXIN (this
pin is floating), AUXOP, JACK_DETECT, HOOK_DETECT. This type supports mono sound
Switching from Receiver to Headset Jack
If jack is inserted, JACK_DETECT goes from low to high.
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 high to low.
Audio path is switched from earphone to receiver by JACK_DETECT interrupt.
Hook detection
If hook-button is pressed, HOOK_DETECT is changed from high to low.
This is detected by AUXADC2.
And then hook is detected.
H
L
CLOSE TO EARJACK
JACK_DETECT
REMOVE
INSERT
C219
39p
C208
NA
1
2
3
4
5
J200
C206
0.1u
39p
C213
R214
4.7
C209
22u
2V5_JACK
GND
2
OUT
1
VCC
5
VIN+
3
4
VIN-
LMV7291MGX-NOPB
U202
2V8_VEXT
1M
R210
2V8_VEXT
R202
1K
C214
33u
NA
R207
C217
39p
R204
1.5K
R203
20K
R212
4.7
1M
R217
VA204
AVL5M02-200
0.1u
C201
330K
R216
0.1u
C606
R205
12K
NA
C207
HOOK_DETECT
AUXIP
AUXIP
AUXIN
JACK_DETECT
AUXOP
Figure 3-29. HEADSET JACK INTERFACE
Содержание C3380
Страница 1: ...Service Manual Model C3380 Date November 2005 Issue 1 0 Service Manual C3380 ...
Страница 3: ... 4 ...
Страница 83: ...4 TROUBLE SHOOTING 84 4 11 KEY backlight Trouble Test Points Figure 4 22 ...
Страница 98: ...4 TROUBLE SHOOTING 99 Yes No Yes No Replace M201 Establish a call Replace U101 Software Re_download ...
Страница 109: ...Note 110 ...
Страница 116: ... 117 8 PCB LAYOUT ...
Страница 117: ... 118 8 PCB LAYOUT ...
Страница 125: ...10 STAND ALONE TEST 126 Figure 10 2 HW test setting Figure 10 3 Ramping profile ...
Страница 129: ... 130 ...
Страница 131: ... 132 ...