HYT CSR8645 User manual

CSR8645 AMP Manual
HYT

Contents
1. CSR8645 AMP................................................................................................... 1
1.1 PRODUCT DESCRIPTION .................................................................................................2
1.2 APPLICATION AREAS ......................................................................................................2
1.3 BASIC FEATURES ............................................................................................................2
1.4 PROPERTY ......................................................................................................................2
1.5 MODULE SIZE.................................................................................................................3
1.6 IO DEFINITION ...............................................................................................................4
1.7 TYPICAL CIRCUIT...........................................................................................................5

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CSR8645 AMP Manual
1. CSR8645 AMP
1.1 CSR8645 AMP
1.2 CSR8645 AMP IO

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CSR8645 AMP Manual
1.1 Product Description
This module master uses CSR's BC8645 chip to provide high quality sound quality and
compatibility for the module, and overall performance is superior. Bluetooth module using the
drive-free way, customers only need to access the application module, you can quickly achieve the
music wireless transmission, enjoy the fun of wireless music. Support high-quality audio APT-X
digital transmission, and can connect two main devices Bluetooth. After the module is switched on
automatically connected to the last pairing phone, the penultimate paired phone needs to be
manually connected. If the 6 pairing devices are turned on at the same time, the last pairing phone
is automatically connected。
1.2 Application areas
The module is mainly used for short distance music transmission, and can easily and
notebook computers, mobile phones, PDA and other digital products connected to the Bluetooth
device to achieve the wireless transmission of music。
1) Stereo Bluetooth speakers；
2) Stereo Bluetooth Headset；
3) Bluetooth handsfree calls；
4) Bluetooth control and multimedia devices；
1.3 Basic features
1) Bluetooth v4.0；
2) A2DP v1.2；
3) AVRCP v1.4；
4) HFP v1.6；
5) GAVDP1.2；
6) HSP1.2。
1.4 Property
Model
BT8645V411
Bluetooth specifications
Bluetooth V4.0
Modulation mode
GFSK，π/4 DQPSK，8DPSK
Supply voltage
BAT：3.3-4.2V；
VCC：The power supply depends on the isolation module with 5V
or 12V power supply
Support for Bluetooth
protocol
HFPV1.6, A2DPV1.2,AVRCPV1.4，HSPV1.2
Working current
≤30mA
Standby current
<50uA
temperature range
-40ºC ~ +85ºC
Wireless transmission range
≤10M
Transmission power
Class1/Class2/Class3 9dbm
Sensitivity
-80dBm<0.1%BER
Frequency Range
2.4GHz~2.480GHz
Audio performance
支持 ACC，MP3，SBC，APT-X
Audio signal to noise ratio
≥75dB
Distortion
≤0.1%

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CSR8645 AMP Manual
1.5 Module Size
1.3 CSR8645 AMP Size

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CSR8645 AMP Manual
1.6 IO Definition
IO Number
IO Name
IO Description
1
VOL+
Volume increases
2
VOL-
Volume down
3
NEXT
Next track
4
PREV
Previous piece
5
PLY
Play/Pause/Pickup/Call Back/Reconciliation Pair
6
COM
Button public
7
BAT
Power input (3.3 ~ 4.2V)
8
GND
BAT power ground
9
VCC
The voltage depends on the isolation module with both 5V
or 12V
10
GND
VCC power ground
11
M+
Mic positive pole
12
M-
Mike negative
13
NC
Empty
14
NC
Empty
15
NC
Empty
16
NC
Empty
17
NC
Empty
18
OUTR
Single-ended output R
19
AGND
Single-ended output G
20
OUTL
Single-ended output L

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CSR8645 AMP Manual
1.7 Typical Circuit
1.4 No DC isolated BAT power supply

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CSR8645 AMP Manual
1.5 DC isolated VCC powered
NOTE：
MIC is a polarity, do not weld anti。