BM90
BM90 is Bluetooth 3.0 Multi-Speaker Stereo Audio Module manufactured by ISSC.
Bluetooth® 3.0 Multi-Speaker Stereo Audio Module
Features
System Specification
- pliant with Bluetooth Specification v.3.0 + EDR in 2.4 GHz ISM band module
- It supports following profiles :
- Hands Free 1.5
- Headset 1.0
- A2DP 1.0
- AVRCP 1.0
Baseband Hardware
- Built-in 16MHz main clock input.
- Built-in internal ROM for program memory
- Support to connect to two hosts ( phones, tablets…) with HFP or A2DP profiles simultaneously
- Adaptive Frequency Hopping (AFH) avoids occupied RF channels
- Fast Connection supported
RF Hardware
- Fully Bluetooth 3.0 + EDR system in 2.4 GHz ISM band.
- bined TX/RX RF terminal simplifies external matching and reduces external antenna switches.
- Max. +4d Bm output power with 20 d B level control from register control.
- Built-in T/R switch for Class 2/3 application
- To avoid temperature variation, temperature sensor with temperature calibration is utilized into bias current and gain control.
- Fully integrated synthesizer has been created. There requires no external VCO, varactor diode, resonator and loop filter.
- Crystal oscillation with built-in digital trimming for temperature/process variations.
- Built-in PCB antenna.
Audio processor
- Support A-Law or -Law PCM format, or CVSD
(Continuous Variable Slope Delta Modulation) for SCO channel operation.
- Noise suppression
- Echo suppression
- SBC...
