博通BCM2049蓝牙+FM接收方案

博通(Broadcom)公司的BCM2049是单片蓝牙2.1+集成了FM收发器的EDR,非常适合需要蓝牙和FM接收器/发送器的手提设备如手机和媒体播放器的应用.在软件上, BCM2049向后和BCM2048兼容.它的蓝牙特性支持WLAN和WiMAX的共存,具有标准的HCI接口.FM收发器支持65MHz到108MHz FM+RDS/RBDS频段.可广泛用在手机和智能手机,PDA,手提媒体播放器(PMP),手提GPS和数字卫星无线电接收器.本文介绍了BCM2049中通用部分,蓝牙部分和FM收发器的主要特性,功能方框图以及方框图.
BCM2049:Single-Chip Bluetooth 2.1 + EDR with Integrated FM Transceiver
Broadcom’s BCM2049 is a cost-effective solution for portable devices, like mobile handsets and media players, that require Bluetooth® and FM receiver/transmitter functionality. At the software layer, the BCM2049 is backward-compatible with Broadcom’s BCM2048 Bluetooth + FM receiver. The BCM2049s Bluetooth core is optimized for low current consumption and minimal external bill-of-materials, while maintaining high receiver sensitivity and up to +10 dBm of transmit output power. The Bluetooth core is fully Bluetooth 2.1 + EDR compliant. SmartAudio technology has also been added to enhance voice quality by supporting Packet Loss Concealment and Wide-Band Speech. In conjunction with Broadcom’s BTE-Mobile software stack, the BCM2049 supports multiple simultaneous Advanced Audio Distribution Profile (A2DP) streams, enabling music sharing between several stereo Bluetooth headsets. The BCM2049 includes a feature-rich FM transmitter core that supports programmable transmit frequencies between 76 and 108 MHz to cover worldwide bands. The FM transmitter core has an on-chip, high-output power amplifier with power control, making it possible to optimize FM transmit output power and at the same time complying with US and European regulatory requirements.

Broadcom’s BCM2049 is a cost-effective solution for portable devices, like mobile handsets and media players, that require Bluetooth® and FM receiver/transmitter functionality. At the software layer, the BCM2049 is backward-compatible with Broadcom’s BCM2048 Bluetooth + FM receiver. The BCM2049s Bluetooth core is optimized for low current consumption and minimal external bill-of-materials, while maintaining high receiver sensitivity and up to +10 dBm of transmit output power. The Bluetooth core is fully Bluetooth 2.1 + EDR compliant. SmartAudio technology has also been added to enhance voice quality by supporting Packet Loss Concealment and Wide-Band Speech. In conjunction with Broadcom’s BTE-Mobile software stack, the BCM2049 supports multiple simultaneous Advanced Audio Distribution Profile (A2DP) streams, enabling music sharing between several stereo Bluetooth headsets. The BCM2049 includes a feature-rich FM transmitter core that supports programmable transmit frequencies between 76 and 108 MHz to cover worldwide bands. The FM transmitter core has an on-chip, high-output power amplifier with power control, making it possible to optimize FM transmit output power and at the same time complying with US and European regulatory requirements.

BCM2049主要特性:
Bluetooth
Bluetooth 2.1 + EDR specification compliant
On-chip, integrated, Class 1 power amplifier for extended range
SmartAudio technology, improving voice and music quality to Bluetooth headsets
Supports multiple simultaneous Advanced Audio Distribution Profile (A2DP) streams for sharing audio between stereo Bluetooth headsets
Wide-band speech support
Low current consumption in all Bluetooth modes
WLAN and WiMAX coexistence support
Standard HCI interfaces (high-speed UART (H4, H5), SDIO and SPI)
General
Monolithic, 65-nm CMOS, single-die Bluetooth® HCI controller and FM transceiver integration
PCB area requirement less than 40 mm2
Spurious-free simultaneous operation between Bluetooth and FM receiver/transmitter
ROM-based solution with flexible code patching and in-system debugging facility
Backward compatibility with BCM2048-based software stack
On-chip LDO regulators (supports direct battery connection)
WLBGA and FPBGA packages available
FM Transceiver
65 MHz to 108 MHz FM+RDS/RBDS band support for worldwide coverage
Supports external or internal FM antenna configurations
Host interface flexibility - Control: UART, SDIO, SPI, BSC (I2C-compatible) - Audio: Analog input/output, dual I2S ports
Superior FM receiver performance with -110 dBm typical sensitivity @ 26 dB SNR
Advanced FM channel search algorithms
High output power FM transmitter with programmable power control to meet regulatory requirements
SmartAudio technology for superior music quality during FM transmission
Supports FM-over-Bluetooth (A2DP) while host baseband processor is in Sleep mode

BCM2049主要应用:
Mobile handsets and Smartphone
Personal digital assistant (PDA)
Portable media players
Portable navigation devices (GPS)
Digital satellite radio receivers



图1. BCM2049功能方框图



图2.BCM2049方框图