Device Details
Radio
■ Common TX/RX terminal simplifies external matching;
eliminates external antenna switch
■ 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
■ Receiver sensitivity of -91dBm
■ 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 16MHz to 26MHz
Baseband and Software
■ Support for Bluetooth v3.0 specification when using
updated configuration as described in the BC6145 QFN
software release note, see www.csrsupport.com
■ Internal ROM
■ 48KB of internal RAM, enables full-speed data transfer,
mixed voice/data and full piconet support
■ Logic for FEC, HEC, 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 set-up
headset features and user interface
■ HFP v1.6 and HSP v1.2
■ Secure simple pairing
■ CSR's proximity pairing (headset-initiated pairing)
■ Supports mSBC wideband speech decoder
■ Advanced multipoint support, enables a headset to
connect to 2 mobile phones or 1 mobile phone and a
VoIP dongle
■
DSP-based 6
th
generation 1-mic CVC echo and noise
cancellation for effective noise cancellation under all
conditions
■ Bidirectional noise reduction ensures increased speech
clarity in preparation for improving intelligibility through
spectral enhancement for the user and the person they are
speaking to
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
■ Separate program memory and dual data memory
■ Program memory cache when executing from ROM
Audio Codec
■ 16-bit resolution mono codec
■ Integrated amplifiers for driving a 16Ω speaker; no need
for external components
■ Support for single-ended speaker termination and line
output
■ Integrated low-noise microphone bias
■ Digital enhancements to add bass cut and side tone
■ Analogue enhancements to support single-ended speaker
drive capability and reference availability
Physical Interfaces
■ Synchronous serial interface for system debugging
■ I²C compatible interface communicates with an external
EEPROM which contains all of the device configuration
(PS Keys)
■ Synchronous serial interface communicates with an
external SPI flash device, which can store programmable
audio prompts
■ UART interface with data rates up to 3Mbits/s
Auxiliary Features
■ BIST minimises production test time
■ 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
■ Integrated regulators: 1.5V output from 1.7V to 2.8V input
and 1.9V output from 2.7V to 5.5V input
■ Integrated 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
■ 10-bit ADC
■ Battery charger with programmable current, 20mA to
150mA for lithium ion/polymer battery. Supports external
boost charge for up to a total of 240mA fast charge current.
■ 2 LED drivers with faders
Package Option
■ 48-lead 7 x 7 x 0.9mm, 0.5mm pitch QFN
Production Information
© Cambridge Silicon Radio Limited 2010-2011
Page 2 of 4
CS-204185-TOP4
www.csr.com
BC6145 QFN
Technical Overview
