Bluetooth® 3.0 Multi-Speaker Stereo Audio Module
Compliant 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
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
Fully Bluetooth 3.0 + EDR system in 2.4 GHz ISM
Combined TX/RX RF terminal simplifies external
matching and reduces external antenna switches.
Max. +4dBm output power with 20 dB 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
Built-in PCB antenna.
Support A-Law or -Law PCM format, or CVSD
(Continuous Variable Slope Delta Modulation) for
SCO channel operation.
Packet loss concealment
Build-in one languages (English) voice prompts and
20 events for each one
16 bit DAC and 16 bit ADC codec
94dB SNR DAC playback
85 dB SNR ADC.
Built-in Lithium-ion battery charger (up to 350mA)
Integrate 3V, 1.8V configurable switching regulator
Built-in ADC for battery monitor and voltage sense.
A line-in port for external audio input
Two LED drivers
Built-in 32Kb EEPROM
Flexible HCI interface
High speed HCI-UART (Universal Asynchronous
Receiver Transmitter) interface (up to 921600bps)
15x29mm2 40 pins package
BM90 multi-speaker stereo audio module is a
compact, highly integrated module for Bluetooth v3.0
with Enhanced Data Rate 2.4GHz applications. This
module is fully compliant with Bluetooth specification
and completely backward-compatible with Bluetooth
2.0 or 1.2 systems.
It incorporates IS1690S multi-speaker stereo audio
chip, 32Kb EEPROM, PCB antenna, and ISSC’s own
Bluetooth software stack to achieve the required BT
v3.0 with EDR functions.