Specification
Radio
- Common TX/RX terminal simplifies external matching; eliminates external antenna switch
- No external trimming is required in production
- Bluetooth v2.1 + EDR specification compliant
Transmitter
- +10dBm (QFN package) or +7dBm (WLCSP package) RF transmit power with level control from on-chip 6-bit DAC over a dynamic range >30dB
- Class 1 (QFN package only), Class 2 and Class 3 support without the need for an external power amplifier or TX/RX switch
Receiver
- Receiver sensitivity of -90dBm
- Integrated channel filters
- Digital demodulator for improved sensitivity and cochannel 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 16 and 26MHz or an external clock between 12 and 52MHz
Baseband and software
- AuriStream (16, 24, 32, 40 kbps) CODEC, which offers significant power reduction over the CVSD based system when used at both ends of the link
- Internal 6Mbits ROM
- Internal 48kbyte RAM, allows full speed data transfer, mixed voice and data, and full piconet operation, including all EDR 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 v2.1 + EDR features including eSCO and AFH
- Transcoders for A-law, mu-law and linear voice from host and A-law, μ-law and CVSD voice over air
Auxilliary features
- Crystal oscillator with built-in digital trimming
- Clock request output to control an external clock
- Device can run in low power modes from an external 32768Hz clock signal
- Power management includes digital shutdown, and wake up commands with an integrated low power oscillator for ultra low power Park/Sniff/Hold mode
- Auto Data Rate setting, subject to host interface in use
- On-chip linear regulators: 1.8V output from 2.7V to 5.5V input to power I/O ring (load current 100mA) and 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 permitted
Physical interfaces
- SDIO and CSPI
- Synchronous serial interface up to 4Mbaud for system debugging
- UART interface with programmable baud rate up to 4Mbaud with optional bypass mode
- Bi-directional serial programmable audio interface, supporting PCM and I2S formats
Bluetooth stack
CSR's Bluetooth protocol stack runs on the on-chip MCU in the following configuration:
- Standard HCI over UART
Package options
- 40 Lead 6 x 6 x 0.6mm, QFN
- 51 Ball 3.49 x 3.21 x 0.6mm (max.), WLCSP