BTM303/QCC3003 stereo Bluetooth 5.0 audio module module I2S analog output with 16M SPI FLASH memory chip

Compatibility:others
Camera Equipped:No
Model Number:QCC3003
State of Assembly:Almost Ready

Precautions:
1. The module pins are dense and require a good welder foundation. The module is tested before shipment, and will not be returned after Shangxi!
2. CSR Bluetooth module audio is differential output, you need to add op amp or amp circuit to single-ended output (left channel, right channel, audio common).
3. Only the module application data, ie the Bluetooth module specification and the Bluetooth module reference schematic, are provided.
4. Support app control, you can view Bluetooth information and modify EQ function (more features to explore slowly)
BTM303 Bluetooth audio module, using QCC3003 chip, supports A2DP, AVRCP, HFP, AAC, I2S, etc., using 16M SPI FLASH memory chip.
2019.06.04: The firmware update supports both I2S digital and differential analog audio output, while eliminating the various tones that most customers dislike.
Software Description:
Bluetooth name: BT Speaker
Note: The button is active high (MFB high level is 3.3V, PIO high level is 1.8V)! Another: Here is the PIO port, not the actual PIN pin, you need to check the specification to see the actual PIN foot!
The button description is as follows:
MFB: High level boot, low level shutdown (PIN30 needs low level when the module is powered on, need to do delay circuit when powering on, can't pull up directly, boot automatically enters pairing mode)
PIO6: Amplifier control enable pin (output level 1.8V when audio output is available)
PIO8: Short press play/pause/answer/hang up, long press 1 second to reject the call
PIO1: Short press the previous track, long press the volume minus
PIO7: Short press a song, long press volume plus
Special function description:
PIO8: Press and hold for 3 seconds to force the pairing mode, press and hold for 6 seconds to clear the pairing list.