BlueCore4-Ext™

Description

CSR's BlueCore4-Ext device implements the Enhanced Data Rate (EDR) Bluetooth^® specification, allowing it to deliver data rates that are 3-times faster than v1.2 Bluetooth devices. This transfer rate also means that, for a given amount of data, the radio will be active up to 3 times less than a v1.2 radio, reducing power consumption.

These features make the device ideal for lower-volume applications, general development and prototyping, and any markets that demand the ability to upgrade quickly. A version with integral mask-ROM and HCI (or optionally RFCOMM) Bluetooth stack is also available for volume applications such as mobile phones and PDAs.

Key features

Enhanced Data Rate (EDR) compliant for both 2Mbps and 3Mbps modulation modes
Single-chip solution integrating radio, baseband, microcontroller
External Flash memory interface (8Mbits)
Bluetooth v2.0+EDR system (v2.1 upgradeable)
Full speed Bluetooth operation with full Piconet support
Scatternet support
Extended SCO (eSCO) support
USB and dual UART ports
Support for 802.11 coexistence

Benefits

EDR Bluetooth means that a 1Mb image download, which can take about 12 seconds will only take 4 seconds
Higher speed Bluetooth radio connection from the cordless home or business access point will allow for the simultaneous transfer of more data whilst the telephone call is being placed over the fixed line infrastructure
Allows PC support of multiple Bluetooth links, such as Bluetooth keyboard and mouse, listening to music using Bluetooth stereo headphones, synchronising contact details with handset or the handset as a modem to connect to an email or internet service
EDR enables data to be transmitted at speeds suitable for laser printers
EDR opens up Bluetooth to potentially wider applications in home-entertainment. A Dolby 5.1 surround sound system typically transmits its signal at rate of up to around 1Mbps. Bluetooth EDR could offer a potential cost-effective solution for removing the wires from such systems.
Other applications invclude access points, computer accessories (cards, dongles) and digital cameras

Product details

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® v2.0+EDR specification compliant (v2.1 upgradeable)

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

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

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 coexistence interfaces

Package options

96-ball VFBGA, 8x8mm
96-ball VFBGA, 6x6mm

Subject to approval, a datasheet can be made available for this product via CSR Support.