SN-508-8645蓝牙模块为本公司自主开发的智能型无线音频数据传输产品，是低成本的高效率的立体声无线传输方案，模块采用了CSR BC8芯片为模块提供了高品质的音质和兼容性，整体性能更优化。模块采用免驱动方式，客户只需要把模块接入应用产品，就可以快捷地实现音乐的无线传输，享受无线音乐的乐趣。

 

二：应用领域：

该模块主要用于短距离的音乐传输，可以方便地和笔记本电脑手机，PDA等数码产品的蓝牙设备相连，实现音乐的无线传输。

◆蓝牙音响

◆蓝牙立体耳机

◆免提电话

◆蓝牙无线传输音频

◆蓝牙拨号器

 

三：基本特性：

1.Bluetooth Profiles

◆Bluetooth v4.0 specification support

◆HFP v1.6

◆HSP v1.2

◆A2DP v1.2

◆AVRCP v1.4

◆Support for smartphone applications (apps)

2.Music Enhancements

◆Configurable 5-band EQ for music playback

(rock,pop, classical, jazz,  dance etc)

◆SBC, MP3, AAC and Faststream decoder

◆Stereo widening (S3D)

◆Volume Boost

◆Support for voice recognition

◆Support for multi-language programmable audio prompts

◆CSR's proximity pairing and CSR's proximity connection

◆Multipoint support for HFP connection to 2 handsets for

3.voice

◆Multipoint support for A2DP connection to 2 A2DP sources  for music playback

◆Talk-time extension

4. Improved Audio Quality

CSR’s latest 2-mic CVC audio enhancements for narrowband and wideband connections including::

◆1-mic far-end audio enhancements

◆Near-end audio enhancements )noise suppressionand AEQ)

◆Wind noise reduction

◆Packet loss concealment

◆Bit error concealment

◆Automatic gain control and automatic volumecontrol

◆Frequency expansion for improved speech intelligibility

◆mSBC codec support for wideband speech

 

四：性能参数：

型号 SN-508-8645

蓝牙规格 Bluetooth V4.0

调制方式 ∏/4 DQPSK,8DPSK

供电电压 3.3-4.2V

支持蓝牙协议 HFPV,1.6,HSPV 1.2,A2DPV1.2,AVRCPV1.4

工作电流 <20mA

待机电流 <50uA

温度范围 -40℃—80℃

无线传输范围 ≥10M

灵敏度 -80dB<0.1%BER频

频率范围 2.4GHZ—2.480GHz

对外接口 PIO,SPI,I2C and PCM,USB

音频性能 立体声支持ACC,MP3，SBC

音频信燥比 ≥75dB

失真度 ≤0.1%

模块尺寸 18.5mm*16.5mm

 

五：模块封装尺寸及引脚定义：

 

 

 

 

 

 

 

 

 

 

六：模块PIN功能说明：

PIN Symb I/O Description

1,12,38 GND Ground Ground  connet  battery negative

2 CSB_ SPI4 Bi-directional with weak pull-down Programmable Input/output Alternative function SPI chip selec PCM1 synchronous data sync

3,4 MISO_SPI3         MOSI _SPI2 Bi-directional with strong pull-down Programmable Input/output   Alternative function: SPI  data output PCMI synchronous data output

5 CLK _SPI5 Bi-directional with strong pull-down Programmable Input/output   Alternative function SPI Clock

6,7 LED0 ,LED1 Open drain output LED Driver

8 MFB Regulator enable input Can also be sensed as an input. Regulator enable and multifunction button. A high input (tolerant to VBAT) enables the on-chip regulators, which can then be latched on internally and the button used as a multifunction input

9,10 PIO_16          PIO_13 Bi-directional with strong pull-down programmable  Input/output

13 VBUS 　 Charge input

14 CHG_EXT 　 External battery charger control

15 EXT_SENSE 　 Groung  connet battery sense input

16 1V8 power 1.8v swith-mode power regulator Inductor connection

17 VBAT 　 Battery positive internal

18 USB_N Bi-directional USB data

19 USB_P Bi-directional USB data

20 PIO_7 Bidirectional with strong pull-down Programmable input / output line 7.

21 PIO_9 Bidirectional with strong pull-down Programmable input / output line 9.

22 PIO_0 Bidirectional with strong pull-down Programmable input / output line 0.

23 USB3V3 3.3V bypass linear regulator output Positive supply for USB port.

Connect external minimum 2.2μF ceramic decoupling capacitor

24 PIO_1 Bidirectional with strong pull-up Programmable input / output line 1. Alternative function UART_TX: UART data output

25 PIO_8 Bidirectional with strong pull-up Programmable input / output line 8. Alternative function UART_TX: UART data output

26 PIO_21 Bidirectional with strong pull-up Programmable input / output line 21. Alternative function UART_TX: UART data output

27 PIO_20 Bidirectional with strong pull-up Programmable input / output line 20. Alternative function UART_TX: UART data output

28 MIC_BIAS Analogue in Micophone bias

29 MIC_1P Analogue in Line or mircophone input positive channel A

30 MIC_1N Analogue in Line or microphone input negative channelA

31 PIO_18 Bi-directional with weak pull-down Programmable input / output line18.

32,33 MIC_2N           MIC_2P Analogue in Line input negative channel B

34 SPK_R_N   Analogue out Speaker output negative right

35 SPK_R_P Analogue out Speaker output positive right

36 SPK_L_N Analogue out Speaker output negetive left

37 SPK_L_P Analogue out Speaker output positive left

39 RF_OUT VDD_ANA_RADIO Bluetooth 50Ω transmitter output /receiver input

40 PIO_19 Bi-directional with weak pull-down Programmable input / output line 19.

七：设计注意事项：

SN-508-8645属于双声道模组，SPKR_LN, SPKR_LP，SPKR_RN, SPKR_RP都有音频输出，属于立体声。  

 

八：电路连接注意：

SN-508-8645外接功放的时候，必须接差分输入的功放，如果不接差分输入的功放，必须接一个运放平衡两个差分的电平，否则会有：“啪啪”的冲击声。

 

九：其他注意事项：

A．如果模组天线旁边有电池，金属物，液晶屏，喇叭等，要求离天线距离至少15MM

B．layout时供电线路建议使用星形走线，并确保蓝牙模组供电线性度要好，还有BT的地必须与运放，功放，MCU等的地分开，而且BT下侧不可有其它干扰地。

C．天线周围不可走控制线，电源线，音频线，MIC等干扰线。

D. 如果模组天线附近有排座，外壳有金属铁网等对信号有影响的，建议避开，可选用专业的高增益天线