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14
KX-TPA65RU/KX-TPA65RUB
4.3.10.
TX Audio Path
Audio Path in IC2 is controlled by IC1 with depending on Headset detection or Hook detection.
And it is swithed alternately as below with holding down "SP-phone" key.
And it is swithed alternately as below with holding down "SP-phone" key.
Pin 27(MPWR) of IC2 supply each microphone line through one's RC-filter.
IC2 convets the analog signal in selected Audio Path to PCM data and sent it to IC1 in TDM.
Handset(Handset Monitor)
IC2 convets the analog signal in selected Audio Path to PCM data and sent it to IC1 in TDM.
Handset(Handset Monitor)
RC-Filter consists of R306 and C311.
An audio signal from Handset is input to pin 26(HSMIP) and pin 25(HSMIN) of IC2.
An audio signal from Handset is input to pin 26(HSMIP) and pin 25(HSMIN) of IC2.
SP-phone
RC-Filter consists of R311 and C313.
An audio signal from microphone is input to pin 24 (MIP) and pin 23(MIN) of IC2.
An audio signal from microphone is input to pin 24 (MIP) and pin 23(MIN) of IC2.
Headset
RC-Filter consists of R310 and C312.
An audio signal from Headset is input to pin 16(LIN0) of IC2.
An audio signal from Headset is input to pin 16(LIN0) of IC2.
Headset detection
When a headset is inserted, pin 26 (DCIN0) of IC1 goes from High to Low and IC1 detects the insertion of the headset.
Hook detection
When a handset is off the hook, pin 28 (DCIN2) of IC1 goes from High to Low and IC1 detects that.
Status
Audio Path
Hook Headset
HI
HI
Handset
Handset Monitor
HI
LOW
Handset
Headset
LOW
HI
SP-phone
-
LOW
LOW
-
Headset
LINO
VCCA
C216
C303
0.1u
C304
0.1u
C324
R309
R311
AG
C310
R305
AG
C309
R310
AG
R312
HEADGND
C321
C325
R313
C318
C316
AG
AG
JK3
Headset Jack
1
4
2
3
3
5
C314
AG
C317
AG
C315
L303
NC
L304
NC
C322
C319
C305
C306
AG
C220
1u
R317
R318
R320
AG
C219
L301
L305
L302
C217
JK2
1
2
3
4
2
3
4
5
SP-
SP+
R316
AG
R308
R307
R315
AG
AG
C302
0.1u
C301
0.1u
R301
3.3k
R302
3.3k
R304
3.3k
R303
3.3k
C308
AG
C307
C323
DG
DG
DG
DG
DG
DG
DG
DG
C326
C327
AG
MICM
HSMIC-
HSMIC+
MICP
HSSP-
SPM
SPP
HDSP
HDMIC
HSSP+
AG
MIC1
1
2
R322
VCCA
L306
25
HSMIN
26
HSMIP
27
MPWR
28
SPOUTP
29
VCCPA
30
SPOUTN
31
HSSPOUTP
32
LOUT
28
DCIN2
26
DCIN0
23
MIN
24
MIP
16
DOUT2V5/DCIN0/LIN0
17
LEDSINK2/DCIN1
18
DCIN2
19
DCIN3/LIN1
20
LEDSINK1/PWM1
21
VREF
22
VCCA
R319
D303
D304
D301
D309
HEADGND
D310
D311
D312
HEADGND
HEADGND
HEADGND HEADGND
HEADGND
D308
D307
L308
L310
L309
HEADGND
AG
D306
D305
C215
C339
C320
C340
R306
R333
R334
C312
C313
C311
AG
IC2
IC1
DG
SW1
1
2
3
4
5
6
R319
D3.2V
L108
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