Specification
Bluetooth® Radio
- Common TX/RX terminal simplifies external matching; eliminates external antenna switch
- No external trimming is required in production
- Bluetooth v2.0 + 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
- Class 1 support using external power amplifier with RF power controlled by an internal 8-bit DAC
Bluetooth receiver
- 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
- Channel classification for AFH
Synthesiser
- Fully integrated synthesiser requires no external VCO varactor diode, resonator or loop filter
- Compatible with crystals between 7.5 and 40MHz (in multiples of 250kHz) or an external clock
FM radio
- Simultaneous operation with Bluetooth
- Support of US/Europe (87.5MHz to 108MHz) and Japanese (76MHz to 90MHz) FM band
- Wide dynamic range AGC
- Soft mute and stereo blend
- Adjustment-free stereo decoder and AFC
- Autonomous search tuning function (up/down) with programmability (threshold setting)
- RDS demodulator
- Audio output available over Bluetooth audio interface or dedicated audio output
- Control of FM via Bluetooth HCI or I2C
- Adaptive filter to suppress narrow band interference in the FM channel
Audio
- Single-ended stereo analogue output
- 16-bit 48kHz, digital audio bit stream output
Baseband and software
- Internal 48kbyte RAM, allows full speed data transfer, mixed voice and data, and full piconet operation, including all medium rate packet types
- Logic for forward error correction, header error control, access code correlation, CRC, demodulation, encryption bit stream generation, whitening and transmit pulse shaping. Supports all Bluetooth v2.0
- + EDR features including eSCO and AFH
- Transcoders for A-law, µ-law and linear voice from host and A-law, µ-law and CVSD voice over air
Physical interfaces
- Synchronous serial interface up to 4Mbits/s for system debugging
- UART interface with programmable baud rate up to 4Mbits/s with an optional bypass mode
- USB v1.1 interface
- I2C slave for FM
- Two audio PCM interfaces (input and output)
- Analogue stereo (output only)
Auxiliary features
- Crystal oscillator with built-in digital trimming
- 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 an external clock
- Device can run in low power modes from an external 32768Hz clock signal
- Auto Baud Rate setting, subject to host interface in use
- On-chip linear regulator; 1.8V output from typical 2.5-5.5V input to power I/O ring (load current 100mA). Second low dropout linear regulator producing 1.5V core voltage from 1.8V
- Power-on-reset cell detects low supply voltage
- Arbitrary sequencing of power supplies is permitted
Bluetooth stack
CSR's Bluetooth Protocol Stack runs on the on-chip MCU in the configuration:
- Standard HCI over UART
Package options
- 6 x 6 x 1mm 84-ball VFBGA
- 4.12x4.04x0.66mm (max.) 0.4mm pitch 67 ball WLCSP