Voice Processing Software
- Up to 32dB of noise suppression
- 3 modes of CVC operation
- 1-mic for use when a wired headset is attached; single microphone, single or dual earpieces
- 2-mic for use with dual-microphone handsets
- Loudspeaker/hands-free for use with handset loudspeaker mode with advanced echo cancellation
- Dual-microphone signal separation
- Full-duplex acoustic echo cancellation
- TX/RX noise suppression
- TX/RX parametric equalisation
- TX/RX automatic gain control
- Noise dependent volume control
- RX adaptive equaliser
- Side tone generation
- GUI application provides real time monitoring and tuning
Stereo Audio CODEC
- 16-bit internal stereo CODEC
- ADC for dual-microphone input
- Integrated low-noise microphone bias
- ADC sample rates: 8, 11.025, 16, 22.05, 24, 32 and 44.1kHz
Bluetooth Radio
- Common TX/RX terminal simplifies external matching; eliminates external antenna switch
- BIST minimises production test time
- Bluetooth v2.1 + EDR specification compliant
Bluetooth Transmitter
- 6dBm RF transmit power with level control from on-chip 6-bit DAC over a dynamic range >30dB
- Class 2 and Class 3 support without the need for an external power amplifier or Tx/Rx switch
Bluetooth Receiver
- Receiver sensitivity of -88dBm
- 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
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Synthesiser
- Accepts 14.40, 15.36, 16.2, 16.8, 19.2, 19.44, 19.68, 19.8 and 38.4MHz TCXO frequencies for GSM and CDMA devices with sinusoidal or logic level signals
Physical Interfaces
- Synchronous serial interface for system debugging
- UART interface with data rates up to 3Mbits/s
Baseband and Software
- Very low power Kalimba DSP coprocessor optimised for audio applications
- 8Mb of internal ROM
- 48KB of internal RAM, allows 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
- CSR7810 interfaces to host processor using BCHS interface, ideal for cell phones and devices requiring many different Bluetooth profiles
- Interface to host via CSR's BCHS Bluetooth Stack
Auxiliary features
- Power management includes digital shutdown and wake-up commands with an integrated low-power oscillator for ultra-low power Park/Sniff/Hold mode
- Clock request output to control external clock
- On-chip regulators: 1.5V output from 1.8V to 2.7V input
- Power-on-reset cell detects low-supply voltage
- 10-bit ADC available to applications
Package options
- WLCSP 90-ball, 3.88 x 4.92 x 0.6mm, 0.4mm pitch
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