解决方案
GS8718蓝牙2.0/4.0双模模组
1、模组介绍
GS8718是一款蓝牙2.0/4.0双模模组,兼容蓝牙V2.1+EDR和V3.0+HS,由MVSILION的BM5064音频处理器和REALTEK的RTL8761蓝牙2.0/4.0双模控制器组成。模组提供:ARMCortex-M3内核、丰富的外设接口、音频编解码和各种音效,以及蓝牙2.0/4.0双模应用的协议栈和解决方案。适用于各种蓝牙无线音频或数据传输应用。
1.1特点
● ARM Cortex-M3,主频96MHz,128K SRAM,两线SW调试接口。
● 符合蓝牙4.0规范,双模(2.1BR/EDR+Low Energy Controllers),兼容V2.1+EDR和Bluetooth 4.0 Low Energy (BLE),最高速率3M bit/s。
● 丰富的蓝牙协议支持,如A2DP、AVRCP、HFP、SPP、GATT、ATT等。
● 提供面向 Android和IOS的APP参考源码。
● 采用 SPI-Flash存储固件,并支持固件加密和升级。
● 外设接口:OTG2.0全速控制器、SDIO、SPI、I2S、IR(红外)、ADC、GPIO、直驱 段码LED。
● 内置音频DSP编解码、音效和声学处理:
MP2/MP3/WMA/FLAC/AAC(MP4)/WAV(IMA-ADPCM and raw PCM)等解码;
ADPCM/MP2/MP3等编码;
Bass Enhancement/Virtual Bass(虚拟低音);
3D Effect(虚拟环绕);
ALC和Dynamic Range Compression (DRC);
Parametric Equalizer (EQ);
Echo(回响);
Acoustic Echo Cancellation (AEC)。
● 音频接口和数字化单元:
立体声16-Bit Audio ADC,20-Bit Audio DAC(可直驱耳机);
立体声Line in、MIC(麦克风)接口;
I2S/PCM Sync输入输出;
Mixer和SRC单元。
1.2应用
● 无线(蓝牙)音频播放系统
● 车载免提应用
● 蓝牙4.0 BLE应用类产品
● 卡拉OK系统
● 立体声头戴式耳机
● 蓝牙智能灯具
● Soundbar等
1.3接口和应用框图
1.4电路原理图
1.5模组尺寸
1.6引脚定义
PIN# |
TYPE |
Other Function Assignment |
1 |
GP_C14 |
SWD |
2 |
GP_C13 |
SWCLK |
3 |
AGND |
Ground for Analog |
4 |
DACVMID |
Internal voltage reference |
5 |
DAC_RO |
Audio right channel output |
6 |
DAC_LO |
Audio left channel output |
7 |
VCC33 |
LDO 3.3V out |
8 |
XIN |
32.768KHz Crystal oscillator input for PLL |
9 |
XIO |
32.768KHz Crystal oscillator output for PLL |
10 |
DGND |
Ground for DIgital |
11 |
VDD |
5V power LDOIN |
12 |
DGND |
Ground for Dlgital |
13 |
GP_A0 |
PWM0 / UART_TX / CHARGE-LED |
14 |
PWM1 |
Cold light debugging |
15 |
PWM2 |
Warm light debugging |
16 |
PWM3 |
Red light debugging |
17 |
PWM4 |
Green light debugging |
18 |
PWM5 |
Blu-ray debugging |
19 |
MUTE |
A fter level control power amplifier |
20 |
RX |
UART _RX |
21 |
TX |
UART_TX |
22 |
IR |
NEC IR |
2.模组参数和性能
2.1综合参数
PARAMETER |
DESCRIPTION |
MIN |
TYP |
MAX |
UNIT |
VDD |
Power supply voltage |
3.35 |
|
5V |
|
TEMP |
Operating temperature |
-40 |
|
85 |
℃ |
VIH |
Input high voltage |
1.6 |
|
3.6 |
V |
VIL |
Input low voltage |
-0.3 |
|
1.0 |
V |
VOH |
Output high voltage(@IOH = 8mA) |
2.4 |
|
|
V |
VOL |
Output low voltage(@IOL = 8mA) |
|
|
0.4 |
V |
Power |
A2DP playing |
|
60 |
|
mA |
HFP communication |
|
60 |
|
mA |
|
USB disk or card playing |
|
30 |
|
mA |
|
Sniff(BT) & sleep(MCU) mode |
|
12 |
|
mA |
|
Sleep mode |
|
2.5 |
|
mA |
|
Power down mode |
|
20 |
|
uA |
2.2 BT4.0参数
工作频段 |
2.4GHz(ISM Band) |
蓝牙规范 |
V4.0 / V2.1 + EDR |
Protocol |
GATT, ATT, BB, LMP, HCI, L2CAP, GAP, SDP, RFCOMM |
Profile |
A2DP 1.3, AVRCP 1.4, HFP 1.5, HSP, SPP 1.2, OPP |
BLE角色 |
Peripheral / Central |
输出功率等级 |
Class 2, Typ. 4dBm |
接收灵敏度 |
-89dBm |
传输距离 |
A2DP:Typ. 20m,Max. 50m |
2.3音频性能
高性能双声道立体声16-Bit Audio ADC和20-Bit Audio DAC,支持9种采样率:8KHz, 11.025KHz,12KHz,16KHz,22.05KHz,24KHz,32KHz,44.1KHz,48KHz
Audio DAC性能:
PARAMETER |
TEST CONDITIONS |
TYP |
UNIT |
Dynamic Range |
No Filter |
93.6 / 93.6 |
dB |
With A-Weighted Filter |
95 / 95 |
dB |
|
Signal-to-Noise Ratio |
No Filter |
95.5 / 95.6 |
dB |
With A-Weighted Filter |
98 / 98 |
dB |
|
THD+N |
Peak THD+N (@0dBFS) |
-81 / -81 |
dB |
Frequency Response |
20 ~ 20KHz |
0.06 |
dBV |
Output Swing |
|
0.993 |
Vrms |
Inter-channel Gain Mismatch |
|
0.003 |
dB |
Group Delay |
|
80 |
us |
Inter-channel Phase Deviation |
|
0.01 |
degree |
Crosstalk |
|
-99 / -98 |
dB |
高性能 LINE IN性能:
PARAMETER |
TEST CONDITIONS |
TYP |
UNIT |
Dynamic Range |
No Filter |
88 / 88 |
dB |
With A-Weighted Filter |
90 / 90 |
dB |
|
Signal-to-Noise Ratio |
No Filter |
88 / 88 |
dB |
With A-Weighted Filter |
90 / 90 |
dB |
|
THD+N |
Peak THD+N |
-84 / -84 |
dB |
Group Delay |
|
26 |
fs |
Power Consumption |
|
7.6 |
mW |
Power Supply Rejection Ratio |
1KHz, 300mVrms |
55 |
dB |

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