Chao at 08:23, 5 July 2018

2018-07-05T08:23:32Z

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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 ==
[[File:ED8635-B-1.png|thumbnail]]
{| class="wikitable sortable"
|-
! 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 ==
<gallery>
File:ED8635-B-app1.png
File:ED8635-B-app2.png | Line and MIC input
File:SPK-8635-B DEMO.png | schematic of demo board
</gallery>

[[category: BT Audio]]

ED8635 - Revision history

Chao at 08:23, 5 July 2018