ST STM32L072CZ超低功耗32位ARM MCU开发方案

ST公司的STM32L072CZ是超低功耗基于ARM Cortex®-M0+的32位MCU,集成了多达192KB闪存,20KB SRAM,6KB EEPROM以及USB,ADC和DAC等,工作频率32MHz,0.95 DMIPS/MHz,工作电压1.65V-3.6V,工作温度-40到125℃ ,工作时的功耗低至93 μA/MHz,主要用在气体/水表和工业传感器,健康和健全制度设备,遥控和用户接口,PC外设,游戏与GPS设备,告警系统,有线和无线传感器以及视频互连.本文介绍了STM32L072CZ主要特性,框图和时钟树,以及评估板B-L072Z-LRWAN1 Discovery kit主要特性,框图,元件布局图和电路图.
The 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 ST...