基于Qualcomm CSR8670+SX9310人體感應藍牙耳機

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此人體感應藍牙耳機，主要由QUALCOMM藍牙CSR8670芯片和SEMTECH公司的SX9310傳感器芯片，兩部分組成的高端人體感應藍牙耳機。對比其他的藍牙耳機，額外具備“當來電 或 音樂時，耳機可以檢測是否為佩戴狀態(tài)，以決定語音 或 音樂是否轉回手機播放”高級功能。

SX9310 是電容比吸收率控制器（SAR）。擁有三個感應器件( CS0, CS1, CS2)，可以使用其三個中的兩個來精確地連接到SAR的智能引擎,來做無生命的物體和人體區(qū)分。第三個傳感器輸入可獨立用于標準電容傳感。I2C的通信接口，在檢測到接近物時由NIRQ腳輸出信號。SX9310包含一個片上的自校正控制器,定期進行敏感度調整以保持在寬溫度變化下的峰值性能，濕度和噪聲環(huán)境，提供簡化產品開發(fā)和提高性能。

實物圖：

核心技術優(yōu)勢

CSR8670 Features:
■ Bluetooth® v4.0 specification fully qualified
software
■ Radio includes integrated balun
■ 80MHz RISC MCU and 80MIPS Kalimba DSP
■ 16Mb internal flash memory (64-bit wide, 45ns);
optional support for 64Mb of external SPI flash
■ Stereo codec with 2 channels of ADC and up to 6
microphone inputs (includes bias generators and
digital microphone support)
■ Support for CSR's latest CVC technology for
narrow-band and wideband voice connections
including wind noise reduction
■ Audio interfaces: I²S, PCM and SPDIF
■ Serial interfaces: UART, USB 2.0 full-speed, I²C
■ Integrated dual switch-mode regulators, linear
regulators and battery charger
■ 3 hardware LED controllers (for RGB) and ability
to drive LCD segment display directly
■ Support for up to 6 capacitive touch sensor inputs
■ 6.5 x 6.5 x 1mm, 0.5mm pitch 112?ball VFBGA
■ Green (RoHS compliant and no antimony or
halogenated flame retardants)

方案規(guī)格

SX9310 PRODUCT FEATURES
■ 2.7 – 5.5V Core Supply (VDD)
 * 1.65 – 2V Host Interface Supply (SVDD)
 * 1.65 – 5.5V Compliant Host Interface (VPULL)
■ Up to 3 SAR Capacitive Sensor Inputs
 * Patented On-Chip Smart Engine For SAR (Body versusInanimate Object Detection)
 * Capacitance Resolution down to 0.08 fF
 * Capacitance Offset Compensation up to 100 pF
 * Integrated RF Shield
 * Advanced Temperature Compensation

■ Automatic Calibration

■ Built-in Start-up Proximity Detection

■ Ultra Low Power Consumption

* Active Mode: 70 uA

* Doze Mode: 8 uA

* Sleep Mode: 2.5 uA

■ 400kHz I2C Serial Interface

■ Programmable Interrupt or Real-Time Status Pin

■ User NVM for Custom Default Registers Values(Standalone Mode)

■ Two Reset Sources: POR, Soft Reset

■ -40°C to +85°C Operation

■ Compact Size: 1.36 x 1.33 mm WLCSP package

■ Pb & Halogen Free, RoHS/WEEE compliant       

方案來源于大大通。