BlueCore™4 External with Extended Data Rate

Key Features of BlueCore™4-Ext

Radio
Common Tx/Rx terminal simplifies external matching; eliminates external antenna switch
BIST minimises production test time, no external trimming is required in production
Full RF reference designs available
Bluetooth™ v1.2 Specification compliant
EDR v0.9 compliant

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
Supports π/4 DQPSK (2Mbps) and 8DPSK (3Mbps) modulation

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
Supports π/4 DQPSK and 8DPSK modulation
Channel classification

Synthesiser
Fully integrated synthesiser requires no external VCO, varactor diode, resonator or loop filter
Compatible with crystals between 8 and 32MHz (in multiples of 250kHz) or an external clock
Accepts 7.68, 14.44, 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

Auxiliary Features
Crystal oscillator with built-in digital trimming
Power management includes digital shut down, 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
On-chip linear regulator; 1.8V output from a 2.2 4.2V input
Can run in low power mode from external 32kHz clock signal
Auto baud rate setting for different TCXO frequencies
Power-on-reset cell detects low supply voltage
Arbitrary power supply sequencing permitted
8-bit ADC available to applications

Baseband and Software
External 8Mbit Flash for complete system solution
Internal 48kbyte RAM, allows full speed data transfer, mixed voice and data, and full Piconet operation, including all medium rate preset 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 v1.2 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 4Mbaud for system debugging
UART interface with programmable baud rate up to 1.5Mbaud with an optional bypass mode
Full speed USB v2.0 interface supports OHCI and UHCI host interfaces
Synchronous bi-directional serial programmable audio interface
Optional I2C™ compatible interface
Optional co-existence interfaces

Bluetooth Stack
CSR's Bluetooth protocol stack runs on the on-chip microcontroller in a variety of configurations:
Standard HCI (UART or USB)
Fully embedded RFCOMM
Customised builds with embedded application code

For further information, please contact kellyb@spectre-online.co.uk