STSTM32L072xx超低功耗32位ARMMCU开发方案.docxVIP

ST STM32L072xx超低功耗32位ARM MCU开发方案时间：2016-10-26 09:48:45 作者：ST 来源：中电网ST公司的STM32L072xx是系于ARM Cortex-M0+核的超低功耗32位MCU,集成了高达192KB闪存,20KB SRAM,6KB EEPROM以及USB,ADC和DAC等模拟特性.工作电压1.65-3.6V,工作温度-40 到125,待机模式电流0.29 A ,主要用在气表/水表和工业传感器,健康和健美设备,遥控和用户接口,PC外游戏和GPS设备以及告警系统,有线和无线传感器与视频连接.本文介绍了STM32L072xx系列主要特性,框图和时钟树,以及包括P-NUCLEO-LRWAN1(NUCLEO-L073RZ板和I-NUCLEO-SX1272D RF扩展板的Nucleo包主要特性,系统框图和I-NUCLEO-SX1272D RF扩展板电路图.STM32L072x8 STM32L072xB STM32L072xZUltra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs The ultra-low-power STM32L072xx are offered in 9 different package typesfrom 32 pins to 100 pins. Depending on the device chosen, different sets of peripherals are included, the description below gives an overview of the complete range of peripherals proposed in this family. These features make the ultra-low-power STM32L072xx microcontrollers suitable for a wide range of applications: Gas/water meters and industrial sensors Healthcare and fitness equipment Remote control and user interface PC peripherals, gaming, GPS equipment Alarm system, wired and wireless sensors, video intercomThe ultra-low-power STM32L072xx microcontrollers incorporate the connectivity power of the universal serial bus (USB 2.0 crystal-less) with the high-performance ARM Cortex- M0+ 32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), high-speed embedded memories (up to 192 Kbytes of Flash program memory, 6 Kbytes of data EEPROM and 20 Kbytes of RAM) plus an extensive range of enhanced I/Os and peripherals. The STM32L072xx devices provide high power efficiency for a wide range of performance. It is achieved with a large choice of internal and external clock sources, an internal voltage adaptation and several low-power modes.The STM32L072xx devices offer several analog features, one 12-bit ADC with hardware oversampling, two DACs, two ultra-low-power comparators, several timers, one low-power timer (LPTIM), four general-purpose 16-bit timers and two basic timer, one RTC and one SysTick which can be used as timebases. They also feature two watchdogs, one watchdog with independent clock and window capability and one window watchdog based on bus clock. Moreover, the STM32L072xx devices embed standard and advanced communication interfaces: up to three I2Cs, two SPIs, one I2S, four USARTs, a low-power UART (LPUART), and a crystal-less USB. The devices offer up to 24 capacitive sensing channels to simply add touch sensing functionality to any application. The STM32L072xx also include a real-time clock and a set of backup registers that remain powered in Standby mode. The ultra-low-power STM32L072xx devices operate from a 1.8 to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V power supply without BOR option. They are available in the -40 to +125 C temperature range. A comprehensive set of power-saving modes allows the design of low-power applications.STM32L072xx系列主要特性:Ultra-low-power platform 1.65 V to 3.6 V power supply -40 to 125 temperature range 0.29 A Standby mode (3 wakeup pins) 0.43 A Stop mode (16 wakeup lines) 0.86 A Stop mode + RTC + 20 KB RAM retention Down to 93 A/MHz in Run mode 5 s wakeup time (from Flash memory) 41 A 12-bit ADC conversion at 10 kspsCore: ARM 32-bit Cortex-M0+ with MPU From 32 kHz up to 32 MHz max. 0.95 DMIPS/MHz Reset and supply management Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds Ultra-low-power POR/PDR Programmable voltage detector (PVD) Clock sources 1 to 25 MHz crystal oscillator 32 kHz oscillator for RTC with calibration High speed internal 16 MHz factory-trimmed RC (+/- 1%) Internal low-power 37 kHz RC Internal multispeed low-power 65 kHz to 4.2 MHz RC Internal self calibration of 48 MHz RC for USB PLL for CPU clock Pre-programmed bootloader USB, USART supported Development support Serial wire debug supported Up to 84 fast I/Os (78 I/Os 5V tolerant) Memories Up to 192 KB Flash memory with ECC(2 banks with read-while-write capability) 20 KB RAM 6 KB of data EEPROM with ECC 20-byte backup register Sector protection against R/W operationRich Analog peripherals 12-bit ADC 1.14 Msps up to 16 channels (down to 1.65 V) 2 x 12-bit channel DACs with output buffers (down to 1.8 V) 2x ultra-low-power comparators (window mode and wake up capability, down to 1.65 V)Up to 24 capacitive sensing channels supporting touchkey, linear and rotary touch sensors 7-channel DMA controller, supporting ADC, SPI, I2C, USART, DAC, Timers 11x peripheral communication interfaces 1x USB 2.0 crystal-less, battery charging detection and LPM 4x USART (2 with ISO 7816, IrDA), 1x UART (low power) Up to 6x SPI 16 Mbits/s 3x I2C (2 with SMBus/PMBus) 11x timers: 2x 16-bit with up to 4 channels, 2x 16-bit with up to 2 channels, 1x 16-bit ultra-low-power timer, 1x SysTick, 1x RTC, 2x 16-bit basic for DAC, and 2x watchdogs (independent/window) CRC calculation unit, 96-bit unique ID True RNG and firewall protection All packages are ECOPACK2图1.STM32L072x系列框图图2. STM32L072x系列时钟树Nucleo包P-NUCLEO-LRWAN1(NUCLEO-L073RZ板和I-NUCLEO-SX1272D RF扩展板)UM2085 User manual Ultra-low-power STM32 and LoRa Nucleo pack with NUCLEO-L073RZ board and I-NUCLEO-SX1272D RF expansion board.The ultra-low-power STM32 and LoRa Nucleo pack (P-NUCLEO-LRWAN1) is a kit based on a NUCLEO-L073RZ board, an I-NUCLEO-SX1272D LoRa RF expansion board from Semtech corporation and a sub-gigahertz sma antenna. The expansion board includes the low-power transceiver SX1272 which features the long-range modem LoRa. This modem provides high-performance LoRa modulation as well as OOK / FSK modulation. It is optimized for use in the 868MHz and 915MHz bands and its maximum output power is 14dBm. The P-NUCLEO-LRWAN1 Nucleo pack is compatible with the I-CUBE-LRWAN1 software expansion, a certified middleware stack (V1.0), compliant with the LoRaWAN specifications V1.0.1. It provides support for bidirectional end-devices in Class-A and Class-C protocols and for end-devices activation either through over-the-air activation (OTAA) or activation by personalization (ABP). After introducing briefly end-to-end operations, this document describes the main components of the P-NUCLEO-LRWAN1 Nucleo pack and how to configure them to join and participate to a LoRa network.图3. P-NUCLEO-LRWAN1 Nucleo包外形图图4. P-NUCLEO-LRWAN1 Nucleo包系统架构图AO-Electronics 傲壹电子 官网： 中文网：ALPS ADI IR JRC/NJR KEC OTAX Seoul Semiconductor TI Walsin Technology硬件元件包括: NUCLEO-L073RZ board (see Section 2.1: NUCLEO-L073RZ board) I-NUCLEO-SX1272D expansion board (see Section 2.2: I-NUCLEO-SX1272D expansion board) Gateway (see Section 2.3: Gateway)NUCLEO-L073RZ boardThe NUCLEO-L073RZ board embeds an STM32L073RZ MCU, a 32-bit microcontroller based on Cortex-M0+ with 192-Kbyte Flash memory, 20-Kbyte SRAM: these characteristics, together with its peripheral set, enable the LoRa middleware stack (I-CUBE-LRWAN) to run. Moreover, the NUCLEO-L073RZ board embeds the ST morpho extension pin headers for full access to all STM32 I/Os and an on-board ST-LINK/V2-1 debugger/programmer with SWD connector able also to manage the serial communication with the STM32L073RZ. User can power up the NUCLEO-L073RZ board by connecting it to a PC through a USB cable. However, the ideal setup for the end-device is to be battery operated. Attach a battery holder for 3 x Alkaline AAA (or AA) batteries at the back of the NUCLEO-L073RZ board and connect/solder the +/- terminals to the power pins on the ST morpho connector as shown in Figure 3. Set the jumper JP5 to E5V so that the board takes the power from the battery. Now the resistor R32 can be removed to reduce the current consumption of the board. Put a jumper on JP1 to allow the ST-LINK debugger to release the reset pin of the target STM32, when the ST-LINK USB is not connected and enumerated on the PC. This allows the STM32 to execute the firmware with the NUCLEO-L073RZ board connected to the PC through the USB.图5.NUCLEO-L073RZ板外形图(右:顶视图,左:电池)I-NUCLEO-SX1272D expansion boardNUCLEO-SX1272D is the STMicroelectronics code name of the ARM mbed shield SX1272MB2DAS. It embeds a LoRa RF transceiver SX1272 chip and all associated RF matching and filtering components enabling one-single, 50ohm antenna port. I-NUCLEO-SX1272D embeds its 32MHz crystal as we