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Bluetooth Audio Module

ED8635-B stereo Bluetooth audio module for remote speakers
 
Quantity:
R 158.00 each Estimated Dispatch --- Total Cost R 158.00

Product Description

This Bluetooth module uses CSR's advanced CSR8635 chip. Along with Bluetooth 4.0, the chip allows the delivery high-performace and high-quality audio in a cost-effective and small module. It can be used to simply receive streaming audio for remote speakers, or to receive and make calls through a paired phone. Features include:

  • Built-in high-quality DAC converter circuit (95dB SNR)
  • The built-in Kalimba DSP data processor provides powerful features including a variety of digital speech processing functions
  • 15 x 21mm module size
  • Bluetooth 4.0
  • Pre-programmed GPIO pins for media control (play, pause, skip etc)
  • Less than 2ma operating current
  • Class 2 RF power level: up to 20m transmission distance
  • Call agreement through the HFP V1.6 profile
  • Simple pairing procedure
  • AUX input support
  • RoHS compliant
 

Pin Descriptions

Pin # Pin Name Functional Description
1 GND Ground
2 GPIO15 Next Song / UART Tx / GPIO15
3 GPIO14 External amplifier mute control / UART Rx / GPIO14
4 RST External reset (active low)
5 MOSI MOSI / GPIO2 / PCM1_IN
6 CLK CLK / GPIO5 / PCM1_CLK
7 CS CS / GPIO4 / PCM1_SYNC
8 MISO MISO / GPIO3 / PCM1_OUT
9 R_LED LED 1
10 B_LED LED 2
11 VREG Power On/Off / Pair Device / Answer Phone Call
12 1V8 Internal regulator output
13 VBAT Power supply / lithium Battery input (3.5V - 5V)
14 Vsense Battery detection (can be left N/C)
15 GND Ground
16 MIC_BIAS Bias output for microphone
17 AUX_RP Aux input (right channel, positive)
18 AUX_RN Aux input (right channel, negative)
19 MIC_LP Mic input (positive) / Aux input (left channel, positive)
20 MIC_LN Mic input (negative) / Aux input (left channel, negative)
21 GND Ground
22 SPK_RN Speaker ouput (right, negative)
23 SPK_RP Speaker ouput (right, positive)
24 SPK_LN Speaker output (left, negative)
25 SPK_LP Speaker output (left, positive)
26 GPIO21 Play/Pause Control / GPIO21
27 GPIO18 Volume Down Control / GPIO18
28 GPIO7 Volume Up Control / GPIO7
29 GPIO6 Previous Song / GPIO6
30 GND Ground
31 ANT External Antenna

 

Application Notes

  • Control inputs are active high and can be pulled up to the 1V8 output through a push button.
  • The speaker outputs should be buffer through a suitable amplifier IC to drive any significant load.
  • The microphone input needs suitable external biasing (using the MIC_BIAS output) in order to be effective.

Download the CSR8635 datahseet