User Guide
Table Of Contents
NPL-1
3 - Audio System PAMS Technical Documentation
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EADSET /
LOOPSET
A
D
MICDATA
6 dB
-30 - 0dB
EARDATA
MUX
MIC1P
EARP
HF
EARPIECE
UEM
0-22.5dB
Anti-alias
filter
6 dB
MUX
D
A
SC DAC
HeadInt
Buzzer Driver
Vibra Driver
BUZZO
M
VIBRA
PWM
PWM
HookInt
EARN
MIC1N
MIC2P
MIC2N
Mic Equaliser
UPP
0 / 20 dB
CARK-91
MBUS
HFCM
MIC3P
MIC3N
MIC
HP 1
HP 3
HP 2
Tone Generator
AEC
UDRC
U-ALWE /
VAD
AGC
Speech codec
Ear
Equaliser
DRC
D-ALWE /
VAD
Encoder
Decoder
DAI4 Mic
DAI4 Ear
FBUS Tx
FBUS Rx
Sidetone
FBUS Tx
FBUS Rx
BT102
SCO Airlink
LPRF
CBUS
Boomer
+8.2 dB
Figure 1. Audio Block diagram