The 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.
To provide the superior audio and voice quality, it also integrates a DSP co-processor, a PLL, and a CODEC dedicated for voice and audio applications. For voice, not only basic CVSD encoding and decoding but also enhanced noise reduction and echo cancellation are implemented by the built-in DSP to reach the better quality in the both sending and receiving sides. For enhanced audio applications, SBC decoding functions can be also carried out by DSP to satisfy Bluetooth A2DP requirements.
In addition, to minimize the external components required for portable devices, a battery voltage sensor , battery charger, a switching regulator and LDO are integrated to reduce system BOM cost for various Bluetooth applications.
Compliant with Bluetooth Specification v.3.0 +
EDR in 2.4 GHz ISM band module
Supports the following profiles :
Hands Free 1.5
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
Adaptive Frequency Hopping (AFH) avoids
occupied RF channels
Fast Connection supported
Fully Bluetooth 3.0 + EDR system in 2.4 GHz