Smart Electronics CSR8645 Bluetooth 4.0 Low-Power Audio Module Supports High-Quality Lossless Compression Speaker Amplifier Board

1. Keys: There are a total of 6 function keys: POWER-EN, PLAY, VOL+, VOL -, PREV, NEXT.

The introduction of button functions is as follows

POWER-EN: When using a switch control module to turn on or off the machine, by turning the switch, 

when POWER-EN is connected to BAT, the module will turn on

When POWEREN disconnects BAT, the module shuts down and is typically used for battery power. 

When using module power on, simply connect the POWER-EN series 10K resistor to the BAT to achieve 

module power on, which is usually used when external power is supplied. PLAY: Play/pause (short press), 

answer/hang up the phone (long press, slightly longer time), pair again (long press)

VOL+: Volume increase

VOL -: Volume reduction

PREV: Previous track

NEXT: Next track

2. LED: the match state, double flashing alternately, paired, single lamp flicker;

3. USB card function (for USB sound card function please specify);

4. AUX-IN switching function;

5. 3.2V low battery alarm, automatic shutdown (3.0V, the realization of the AMS1117 power supply);

6. the maximum charge current is set to 250MA, full of the light out,

lit another lamp (personal recommendations with charging module, fast);

7. no connection has been in a match;

8. can also connect the 2 Mobile phone;

9. EN audio amplifier control pin, when in the silent, after a period of time, the output low;

when playing, the output high level (1.8V).