3. TECHNICAL BRIEF
- 32 -
Figure 3-15 AD6537B AUDIO SECTION
GPI
CSFS
CSDI
CSDO
ASFS
ASDI
ASDO
AD6537B
Control
Ring Tone
Volume Controller
Serial
Port
Audio
Serial
Port
Filter/
SRC
Filter/
SRC
DAC
ADC
Analog Adder
PGA
PGA
Gain
Pre-Amp
Microphone Interface
Analog
Switch
AIN3P
AIN3N
8
32
32
SPWR
AOUT2P
AOUT2N
AOUT1N
AOUT3P
AOUT3N
AOUT1P
SGND
AIN1P
AIN1N
AIN2P
AIN2N
PGA
Analog
Switch
3.6.4 Audio Section
1. Receive audio signal from microphone. B2050 uses differential configuration.
2. Send audio signal to speaker. B2050 uses differential configuration.
3. This section provides an audio codec with a digital-to-analog converter and an
analog-to-digital converter, a ring tone volume controller, a microphone interface, and multi-
pleanalog input and output channels.’
4. It interconnects with external devices like main microphone, main receiver, and headset.
The descriptions of audio port used in B2050 are given bellow in detail.
<Up Link>
- AIN1P,AIN1N : Main microphone positive/negative terminal
- AIN2P,AIN2N : Headset microphone positive/negative terminal
- AIN3P,AIN3N : External Analog Input terminal
<Down Link>
- AOUT1P,AOUT1N : Main Speaker positive/negative terminal
- AOUT3P : Headset speaker terminal
Summary of Contents for B2050
Page 7: ... 6 2 PERFORMANCE 2 PERFORMANCE 2 1 H W Features ...
Page 8: ... 7 2 PERFORMANCE ...
Page 9: ... 8 2 PERFORMANCE 2 2 Technical Specification ...
Page 10: ... 9 2 PERFORMANCE ...
Page 11: ... 10 2 PERFORMANCE ...
Page 12: ... 11 2 PERFORMANCE ...
Page 13: ... 12 2 PERFORMANCE ...
Page 57: ... 56 3 Checking Ant SW Mobile SW 4 TROUBLE SHOOTING ...
Page 67: ... 66 TEST POINT 4 6 LCD Trouble 4 TROUBLE SHOOTING ...
Page 70: ... 69 4 TROUBLE SHOOTING TEST POINT 4 7 Speaker Trouble ...
Page 77: ... 76 4 TROUBLE SHOOTING 4 10 KEY backlight Trouble TEST POINT ...
Page 92: ...5 DOWNLOAD AND CALIBRATION 91 5 2 Calibration ...
Page 93: ... 92 5 DOWNLOAD AND CALIBRATION ...
Page 97: ......
Page 103: ... 102 Figure 8 1 B2050 BOTTOM SIDE PCB LAYOUT 8 PCB LAYOUT ...
Page 104: ... 103 8 PCB LAYOUT Figure 8 1 B2050 TOP SIDE PCB LAYOUT ...
Page 105: ......
Page 113: ...10 STAND ALONE TEST 112 ...
Page 117: ......
Page 119: ......
Page 132: ... 131 ...
Page 133: ... 132 ...