ED8635

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Introduction

ED8635-B Bluetooth stereo audio modules British CSR's main chip design. High integration, small size, superior sound quality and other characteristics, external components can be achieved only with a few of its powerful features. With a A2DP, AVRCP any Bluetooth audio devices and remote transmission control protocol (such as: Bluetooth-enabled mobile phones, Bluetooth stereo audio transmitter module, Bluetooth adapters, etc.) to establish a connection, receive high-quality wireless stereo audio stream, and enables remote control of the audio player.

Size and pin definitions ED8635-B compatible ED05-B, the user can upgrade the product without any changes under the premise, reducing product development time.

Features

  • Built-in high-quality DAC converter circuit: 95dB SNR
  • Powerful built-in features of Kalimba DSP data processor, complete a variety of digital speech processing
  • Very small module size: 15x21mm, compatible with all product structure
  • Higher Bluetooth version: Bluetooth V4.0, high software compatibility
  • Very low power consumption: less than 2mA operating current
  • A far transmission distance: Class2 RF power levels of up to 20 m above
  • With high-quality audio transmission protocol: A2DP1.2, AVRCP1.4 remote control protocol
  • Call agreement with HFP V1.6
  • Simple Pairing Support
  • Support AUX input
  • RoHS compliant modules

Pin Definitions

ED8635-B-1.png
Pin NO. Pin Definition I/Os Default Description
1 GND GND
2 PIO15 Next Song control/PIO15/uart_tx
3 PIO14 External amplifier mute control / mute / PIO14 / uart_rx
4 RST IN external RST (Low)
5 MOSI MOSI/PIO2/PCM1_IN
6 CLK CLK/PIO5/PCM1_CLK
7 CSB CSB/PIO4/PCM1_SYNC
8 MISO MISO/PIO3/PCM1_OUT
9 Red LED OUT LED 1
10 Blue LED OUT LED 2
11 VREG IN Power on/off / pair / listen to the phone call control
12 1V8 OUT 1.8V output
13 VBAT IN power or lithium battery power input
14 Vsense IN lithium battery detection
15 GND GND
16 MIC_BIAS OUT microphone power
17 AUX_RP IN line input right channel positive
18 AUX_LN IN line input left channel nagetive
19 MIC_LP IN microphone input positive / AUX_LP
20 MIC_LN IN line input input positive / AUX_LN
21 GND GND
22 SPK_RN OUT stereo right channel output negative
23 SPK_RP OUT stereo right channel output positive
24 SPK_LN OUT stereo left channel output negative
25 SPK_RP OUT stereo left channel output positive
26 PIO21 play pause control / PIO21
27 PIO18 play volume down control / PIO18
28 PIO7 play volume up control / PIO7
29 PIO6 previews song / PIO6
30 GND GND
31 ANT external antenna

scheamtic and circuit design