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ST公司的BlueNRG-2是藍牙標準兼容的非常低功耗藍牙低功耗（BLE）單模式系統(tǒng)芯片（SoC），集成了256KB可編程閃存，24KB靜態(tài)RAM存儲器和SPI，UART，I2C標準通信接口，以及多功能計時器，RTC和DMA控制器，線性穩(wěn)壓器和DC/DC降壓控制器，工作電壓1.7V-3.6V，工作溫度-40 °C到105 °C，主要用在手表，健美，健康和運動設備，消費類醫(yī)療設備，遙控，家庭和工業(yè)自動化，生活協(xié)助，手機外設，照明和PC外設。本文介紹了BlueNRG-2主要特性，架構(gòu)圖和總線架構(gòu)圖，時鐘樹和應用電路，以及BlueNRG-1/ BlueNRG-2開發(fā)板主要特性，電路圖和材料清單。
The BlueNRG-2 is a very low power Bluetooth low energy （BLE） single-mode system-on-chip， compliant withBluetooth specifications.
The BlueNRG-2 extends the features of award-winning BlueNRG network processor， enabling the usage of theembedded Cortex M0 to run the user application code.
The BlueNRG-2 includes 256 kB of programming Flash memory， 24 kB of static RAM memory with retention （two12 kB banks） and SPI， UART， I2C standard communication interface peripherals. It also features multifunctiontimers， watchdog， RTC and DMA controller.
An ADC is available to interface with analog sensors， and to read the measurement of the integrated batteryvoltage sensor. A digital filter is available to process a PDM stream.
The BlueNRG-2 offers the same excellent RF performance of the BlueNRG radio， and the integrated highefficiency DC-DC converter keeps the same ultra-low power characteristics， but the BlueNRG-2 improves theBlueNRG sleep mode current consumption allowing a further increase in the battery lifetime of the applications.
BlueNRG-2主要特性：
? Bluetooth low energy single mode system-on-chip compliant with Bluetooth 5.0specifications：
– master， slave and multiple simultaneous roles
– LE data packet length extension
? Operating supply voltage： from 1.7 to 3.6 V
? Integrated linear regulator and DC-DC step-down converter
? Operating temperature range： -40 °C to 105 °C
? High performance， ultra-low power Cortex-M0 32-bit based architecture core
? Programmable 256 kB Flash
? 24 kB RAM with retention （two 12 kB banks）
? 1 x UART interface
? 1 x SPI interface
? 2 x I2C interface
? 14， 15 or 26 GPIOs
? 2 x multifunction timer
? 10-bit ADC
? Watchdog and RTC
? DMA controller
? PDM stream processor
? 16 or 32 MHz crystal oscillator
? 32 kHz crystal oscillator
? 32 kHz ring oscillator
? Battery voltage and temperature sensors
? Up to +8 dBm available output power （at antenna connector）
? Excellent RF link budget （up to 96 dB）
? Accurate RSSI to allow power control
? 8.3 mA TX current （@ -2 dBm， 3.0 V）
? Down to 1 μA current consumption with active BLE stack （sleep mode）
? ST companion integrated balun/filter chips are available
? Average advertisement current consumption 15.34 μA （advertisement interval1000 ms） – 1 year， 8 months， 19 days with 230 mAh battery （CR2032）
? Average connection current consumption 7.059 μA （connection interval 1000ms） – 3 years， 10 months， 12 days with 230 mAh battery （CR2032）
? Suitable for building applications compliant with the following radio frequencyregulations： ETSI EN 300 328， EN 300 440， FCC CFR47 part 15， ARIB STDT66
? Pre-programmed bootloader via UART
? QFN32， QFN48 and WCSP34 package options
BlueNRG-2應用：
? Watches
? Fitness， wellness and sports
? Consumer medical
? Security/proximity
? Remote control
? Home and industrial automation
? Assisted living
? Mobile phone peripherals
? Lighting
? PC peripherals
The BlueNRG-2 integrates：
? ARM Cortex-M0 core
? Interrupts management
? 256 kB Flash memory
? 24 kB of RAM with two retention options （12 kB or 24 kB）
? Power management
? Clocks
? Bluetooth low energy radio
? Random number generator （RNG） （reserved for Bluetooth low energy protocol stack， but user applicationscan read it）
? Public key cryptography （PKA） （reserved for Bluetooth low energy protocol stack）
? Peripherals：
– SPI interface
– UART interface
– I2C bus interface
– GPIO
– Multifunction timer
– DMA controller
– Watchdog
– RTC
– ADC with battery voltage sensor and temperature sensor
– PDM stream processor
圖1.BlueNRG-2架構(gòu)圖
圖2.BlueNRG-2總線架構(gòu)圖
圖3.BlueNRG-2時鐘樹
圖4.BlueNRG-2應用電路：有源DC/DC轉(zhuǎn)換器，QFN32封裝
圖5.BlueNRG-2應用電路：非有源DC/DC轉(zhuǎn)換器，QFN32封裝
圖6.BlueNRG-2應用電路：有源DC/DC轉(zhuǎn)換器，WCSP34封裝
圖7.BlueNRG-2應用電路：非有源DC/DC轉(zhuǎn)換器，WCSP34封裝
圖8.BlueNRG-2應用電路：有源DC/DC轉(zhuǎn)換器，QFN32封裝帶BALF-NRG-02D3平衡/平衡變換器
BlueNRG-1/ BlueNRG-2開發(fā)板
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