BlueCore® BC6140™

Radio

• Common TX/RX terminal simplifies external matching; eliminates external antenna switch
• No external trimming is required in production
• Bluetooth v3.0 specification compliant

Transmitter

• 8.5dBm RF transmit power with level control from on-chip 6-bit DAC over a dynamic range typically >30dB
• Class 2 and Class 3 support without the need for an external power amplifier or TX/RX switch

Receiver

• -90dBm receive sensitivity
• 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 requires no external VCO, varactor diode, resonator or loop filter
• Compatible with crystals between 16 and 26MHz

Baseband and software

• Internal ROM
• 48KB of internal RAM, enables full-speed data transfer, mixed voice/data and full piconet support
• Logic for forward error correction, header error control, access code correlation, CRC, demodulation, encryption bit stream generation, whitening and transmit pulse shaping
• Transcoders for A-law, μ-law and linear voice from host and A-law, μ-law and CVSD voice over air
• Configurable mono headset ROM software to setup headset features and user interface
• Support for HFP v1.5 (including three-way calling) and HSP v1.1
• Support for Bluetooth v3.0 specification when using updated configuration, see www.csrsupport.com
• Proximity pairing (headset-initiated pairing)
• Packet loss and bit error concealment to restore audio quality in difficult RF environments
• Advanced Multipoint support, enabling the headset to connect to 2 mobile phones or 1 mobile phone and a VoIP dongle
• DSP based single-microphone CVC echo and noise cancellation is included in the BC6140 for effective noise cancellation under all conditions
• BC6140 low-cost mono DSP headset solution development kit available, includes example design.

Power Consumption

• Very low power to provide long talk times

RF performance

• 7.5dBm transmit, -90dBm receive

Packaging

• QFN 48-lead 7x7mm 0.5mm pitch, pin compatible with BlueVox2 and BC6130

Kalimba DSP

• Very low power Kalimba DSP coprocessor, 64MIPS, 24-bit fixed point core
• Single cycle MAC; 24 x 24-bit multiply and 56-bit accumulator
• 32-bit instruction word, dual 24-bit data memory
• 4K x 32-bit program RAM, 8K x 24-bit + 4K x 24-bit data RAM
• 64 x 32-bit program memory cache when executing from ROM

Audio CODEC

• 16-bit resolution mono CODEC
• ADC and DAC
• Integrated amplifiers for driving 16Ω speakers; no need for external components
• Support for single-ended speaker termination and line output
• Integrated low-noise microphone bias
• Digital enhancements to provide side tone
• Analogue enhancements to support single-ended speaker drive capability

Physical Interfaces

• Synchronous serial interface for system debugging
• I²C compatible interface used to communicate with an external EEPROM which contains all of the device configuration (PS Keys)
• UART interface with data rates up to 3Mbits/s

Auxiliary Features

• Crystal oscillator with built-in digital trimming
• Device can run in low power modes from an external 32.768kHz clock signal
• Programmable audio prompts
• Power management includes digital shutdown, and wake up commands with an integrated low power oscillator for ultra low power Park/Sniff/Hold mode
• On-chip regulators: 1.9V output from 2.7V to 5.5V input
• On-chip high-efficiency switch-mode regulator; 1.5V output from 2.2V to 4.4V input
• Power-on-reset cell detects low supply voltage
• Arbitrary sequencing of power supplies permitted
• Battery charger with programmable current, 20mA to 150mA for lithium ion/polymer battery
• 2 LED drivers with faders

Package options

• QFN 48-lead 7 x 7 x 0.9mm, 0.5mm pitch