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3. TECHNICAL BRIEF
- 66 -
3.10.11.2 Audio Signal Processing & Interface
Audio signal processing is divided Uplink path and downlink path.
The uplink path amplifies the audio signal from MIC and converts this analog signal to digital signal
and then transmit it to DBB Chip (MSM6250).
This transmitted signal is reformed to fit in GSM & WCDMA Frame format and delivered to RF Chip.
The downlink path amplifies the signal from DBB chip (MSM6250) and outputs it to Receiver (or
Speaker). The receive path can be directed to either one of two earphone amplifiers or the auxiliary
output. The outputs earphone1 (EAR1OP, EAR1ON) and Auxiliary out (AUXOP, AUXON) are
differential outputs. Earphone2 (EAR2O) is a single-ended output stage designed to drive a headset
speaker. The microphone interface consists of two differential microphone inputs, one differential
auxiliary input and a two-stage audio amplifier.
Earphone
HPF &
SLOPE
X
+ -
- +
HPF and
External Gain
(+18dB Typ.)
MI
CI
N
N
MI
CI
N
P
MI
CFB
N
MI
CFB
P
+ -
- +
Microphone
MIC1P
MIC1N
AUXIP / AUXIL
AUXIN / AUXIR
MIC2P
MIC2N
MICSEL
C1[3:1]
MI
C
O
UTN
MI
C
O
UTP
EAR1ON
EAR1OP
EAR2/
HPh_L
AUXON / Line_R
-
+
+ -
- +
70mW max.*
21.6 mW max.*
21.6 mW max.*
CodecTxGain**
TX_HPF_DIS_N
TX_SLOPE_FILT_DIS_N
CodecSTGain**
PCM
I F
AUX_PCM Interface
X
NS &
AAGC
Rx FIR
X
X
AMR
Encoder
TxVolume**
RxVolume**
nsSwitch
TxPcmFilt
RxPcmFilt
ecSwitch
ecMode
DTMF
Generation
DTMF
Detection
DTMF_RX_GAIN
DTMF_TX_GAIN
ESEC
or
AEC
X
CodecRxGain**
X
HPF
RX_HPF_DIS_N
Codec Rx
Codec Tx
Encoder
Decoder
AMR
Decoder
Tx FIR
X
13 bit A/D
AAGC
AUDIO
LOOPBACK
++
PC
M
_
L
OOP
B
A
C
K
PACKET
LOOPBACK
++
* Amplifiers are powered down
when not selected
** Gain = 20LOG(Value/16384)
++ Refer to Loopback Test
Command
-
+
EAR3/ HPh_R
D/A
Right Channel Data In
+
Left Channel Data In
D/A
AUXOP / Line_L
+ -
- +
2.30 mW max.*
PCM
I F
MIC_AMP2_BYP
Test 6
MIC_AMP1_GAIN
C1[6:4]
-2dB
+6dB
+8dB
+16dB
Mux
+
Sum
Out
0 3 -
Figure 3.10.11.2-1 Audio Interface Detailed Diagram(MSM6250)
Summary of Contents for U8210
Page 22: ...3 TECHNICAL BRIEF 23 Figure 3 2 1 1 RTR6250 IC Functional Block Diagram ...
Page 37: ...3 TECHNICAL BRIEF 38 Figure 3 5 12 1 Bluetooth system architecture ...
Page 110: ...4 TROUBLE SHOOTING 111 USB_D USB_D USB_VBUS X100 48M 48MHz ...
Page 115: ...4 TROUBLE SHOOTING 116 LCD Control data flow ...
Page 117: ...4 TROUBLE SHOOTING 118 LCD Control data flow ...
Page 122: ...4 TROUBLE SHOOTING 123 TR400 ...
Page 124: ...4 TROUBLE SHOOTING 125 FLASH_ON from Main Bíd PM6650 CN1 Flash LED ...
Page 127: ...4 TROUBLE SHOOTING 128 FB503 CN500 FB502 CN2 CN1 ...
Page 129: ...4 TROUBLE SHOOTING 130 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 131: ...4 TROUBLE SHOOTING 132 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 133: ...4 TROUBLE SHOOTING 134 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 135: ...4 TROUBLE SHOOTING 136 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 137: ...4 TROUBLE SHOOTING 138 R649 CN300 CN2 CN1 U605 C633 R648 C634 R622 R623 ...
Page 139: ...4 TROUBLE SHOOTING 140 C627 Head_set Output Pin 4 5 C626 CN304 R624 ...
Page 141: ...4 TROUBLE SHOOTING 142 MIC Contact C404 C401 ...
Page 143: ...4 TROUBLE SHOOTING 144 C115 Head_Phone Input Pin 2 3 C102 CN304 R624 ...
Page 146: ...4 TROUBLE SHOOTING 147 Receptacle 4 6V 4 6V ...
Page 151: ...5 BLOCK DIAGRAM 152 Top Side ...
Page 152: ...5 BLOCK DIAGRAM 153 Bottom Side ...
Page 154: ...6 DOWNLOAD 155 It is ready for downloading ...
Page 160: ...6 DOWNLOAD 161 6 Click on Download to download ...
Page 165: ...6 DOWNLOAD 166 Downloading the Module image Finally Download has been complete ...
Page 168: ...6 DOWNLOAD 169 When you meet the NV Restore error Connect to the phone ...
Page 170: ...6 DOWNLOAD 171 Select the proper file and click on Restore Reading the NV file and restore NV ...
Page 200: ... 201 9 PCB LAYOUT ...
Page 201: ... 202 9 PCB LAYOUT ...
Page 202: ... 203 9 PCB LAYOUT U8210 KEYPAD SPEY0032001 1 1 TOP ...
Page 203: ... 204 9 PCB LAYOUT ...
Page 204: ... 205 9 PCB LAYOUT ...
Page 206: ... 207 ...
Page 207: ... 208 ...