BlueTunes ROM QFN

General Description
Based on the BlueCore® Multimedia ROM QFN, the BlueTunes ROM QFN integrates a Bluetooth radio, baseband, DSP, high-quality audio codec, SMPS, LDO and a battery charger for minimal BOM, component count and PCB area.
BlueTunes ROM QFN uses advanced DSP features for the latest stereo enhancements and to improve audio quality, including SBC and MP3 decoder, support for FastStream (low-latency codec) and 5‑band EQ.

Applications
Stereo headset solution with support for echo and noise reduction
Wireless stereo speakers

BlueTunes ROM QFN includes as standard cVc dual and single microphone algorithms for echo and noise suppression.
cVc dual-mic algorithm can provide >30dB of noise suppression in stationary and dynamic noise conditions. An acoustic echo canceller is now integrated into the cVc dual-mic solution. A cVc single-mic provides full-duplex echo cancellation and a 10dB stationary noise suppressor.
BlueTunes ROM QFN includes secure simple pairing, greatly simplifying the pairing process.

Radio
Common TX/RX terminal simplifies external matching, eliminating external antenna switch
BIST minimises production test time
Bluetooth v2.1 + EDR specification compliant

Transmitter
8dBm RF transmit power with level control from on-chip 6-bit DAC over a dynamic range >30dB
Class 2 and Class 3 support with no need for an external power amplifier or TX/RX switch

Receiver
Receiver sensitivity of -92dBm
Integrated channel filters
Digital demodulator for improved sensitivity and co-channel rejection
Real-time digitised RSSI available on HCI interface
Fast AGC for enhanced dynamic range

Synthesiser
Fully integrated synthesiser needs no external VCO, varactor diode, resonator or loop filter. Compatible with crystals 16MHz to 26MHz or an external clock (12MHz to 52MHz)

Physical Interfaces
Synchronous serial interface for system debugging
I²C compatible interface to external EEPROM containing device configuration data (PS Key)

UART interface
2 LED drivers with faders

Kalimba DSP
Very low-power Kalimba DSP coprocessor, 64MIPS, 24-bit fixed point core
Support for SBC and MP3 codec for improved audio quality (MP3 decode functionality requires licence from Thomson)
Single-cycle MAC; 24x24-bit multiply and 56-bit accumulator
32-bit instruction word, dual 24-bit data memory
6Kx32-bit program RAM, 8Kx24-bit + 8Kx24-bit data RAM, 64x32-bit program memory cache when executing from ROM