BlueNRG－1蓝牙低功耗系统级芯片(SoC)_技术

ST公司的BlueNRG-1是非常低功耗的蓝牙低功耗(BLE)单模式系统级芯片(SoC),包括有160KB可编程闪存,24KB静态RAM存储器,以及SPI,UART,I2C标准通信接口,多功能定时器,看门狗,RTC和DMA控制器等.工作电压1.7-3.6 V,主要用在汽车产出率,手表,健康和健身设备,消费类医疗产出,遥控,家庭和工业自动化,手机外设,照明和PC外设等.本文介绍了BlueNRG-1主要特性,架构框图,RF软件框图,评估平台STEVAL-IDB007V1主要特性,电路图和材料清单.

　　The BlueNRG-1 is a very low power Bluetooth low energy （BLE） single-mode system-on-chip， compliant with Bluetooth specificaTIon.

　　The BlueNRG-1 extends the features of award-winning BlueNRG network processor， enabling the usage of the embedded Cortex M0 for running the user applicaTIon code.

　　The BlueNRG-1 includes 160 KB of programming Flash memory， 24 KB of staTIc RAM memory with retenTIon （two 12 KB banks） and SPI， UART， I2C standard communication interface peripherals. It also features multifunction timers， watchdog， RTC and DMA controller.

　　An ADC is available for interfacing with analog sensors， and for reading the measurement of the integrated battery monitor. A digital filter is available for processing a PDM stream.

　　BlueNRG-1主要特性：

　　 Bluetooth specification compliant master， slave and multiple roles simultaneously， single-mode Bluetooth low energy system-on-chip

　　 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 160 KB Flash

　　 24 KB RAM with retention （two 12 KB banks）

　　 1 x UART interface

　　 1 x SPI interface

　　 2 x I2C interface

　　 14 or 15 GPIO

　　 2 x multifunction timer

　　 10-bit ADC

　　 Watchdog & RTC

　　 DMA controller

　　 PDM stream processor

　　 16 or 32 MHz crystal oscillator

　　 32 kHz crystal oscillator

　　 32 kHz ring oscillator

　　 Battery voltage monitor and temperature sensor

　　 Up to +8 dBm available output power （at antenna connector）

　　 Excellent RF link budget （up to 96 dB）

　　 Accurate RSSI to allow power control

　　 8.2 mA maximum TX current （@ 0 dBm， 3.0 V）

　　 Down to 1 μA current consumption with active BLE stack （sleep mode）

　　 Compliant with the following radio frequency regulations： ETSI EN 300 328，EN 300 440， FCC CFR47 Part 15， ARIB STD-T66

　　 Pre-programmed bootloader via UART

　　 QFN32， WCSP34 package option

　　 Dedicated wettable flank QFN package for automotive grade qualification

　　BlueNRG-1应用：

　　 Automotive product

　　 Watches

　　 Fitness， wellness and sports

　　 Consumer medical

　　 Security/proximity

　　 Remote control

　　 Home and industrial automation

　　 Assisted living

　　 Mobile phone peripherals

　　 Lighting

　　 PC peripherals

　　图1.BlueNRG-1架构框图

　　The BlueNRG-1 is complemented with a Bluetooth low energy stack C library that provides：

　　 Master， slave role support

　　 GAP： central， peripheral， observer or broadcaster roles

　　 ATT/GATT： client and server

　　 SM： privacy， authentication and authorization.

　　 L2CAP

　　 Link Layer： AES-128 encryption and decryption

　　The BlueNRG-1 can be configured for supporting Single Chip or Network processor applications.

　　In the first configuration， the BlueNRG-1 operates as single device in the application for managing both the application code and the Bluetooth low energy stack. The whole Bluetooth low energy stack is provided as object code in a single library file whereas the GATT low energy profiles are provided as object codes in separate libraries.

图2.BlueNRG-1单片RF软件层框图

The BlueNRG-1 can be configured for operating as a network coprocessor. In this case a dedicated firmware is provided for supporting the interface with an external application processor. The whole Bluetooth Low energy stack runs in the BlueNRG-1; the GATT profiles are provided for running in the application processor together with the application code.

　　图3.BlueNRG-1网络处理器RF软件层框图

　　The BlueNRG-1 integrates the blocks listed below：

　　 Cortex M0 core

　　 Interrupts management

　　 160 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）（it is reserved to Bluetooth low energy protocol stack， but user application can read it）

　　 Public Key Cryptography （PKA）（reserved to Bluetooth low energy protocol stack）

　　 Peripherals：

　　 SPI interface

　　 UART interface

　　 I2C bus interface

　　 GPIO

　　 Multifunction timer

　　 DMA controller

　　 Watchdog

　　 RTC

　　 ADC with battery indicator

　　 PDM stream processor

　　BlueNRG-1评估平台STEVAL-IDB007V1

　　The STEVAL-IDB007V1 is an evaluation platform based on the BlueNRG-1， low power Bluetooth® smart system on chip， compliant with the Bluetooth® v4.1 specification and supporting master， slave and simultaneous master-and-slave roles.

　　The STEVAL-IDB007V1 also provides a set of hardware resources for implementing a wide range of application scenarios： sensor data （accelerometer， pressure and temperature sensor）， remote control （buttons and LEDs） and manage debug messages though USB virtual COM.

　　Three power options are available （USB only， battery only， external power supply + USB） for high application development and testing flexibility.