ST STM32 Nucleo板32位MCU开发方案

ST公司的STM32 Nucleo开发板包括NUCLEO-F030R8(支持STM32F0), NUCLEO-F103RB(支持STM32F), NUCLEO-F401RE(支持STM32F4)和NUCLEO-L152RE(支持STM32L1),适合各种性能,功耗和特性的组合. STM32 Nucleo开发板集成了ST-Link调试器/编程器,能和各种开发环境如IAR EWARM, Keil MDK, mbed, 基于GCC的IDEs (Atollic TrueStudio)一起使用,很容易开发出STM32 MCU的新原型.本文介绍了STM32L1 32位MCU主要特性和框图,以及STM32 Nucleo开发板主要特性,框图,电路图,材料清单和PCB元件布局图.

The ultralow power STM32L15xxx incorporates the connectivity power of the universal serial bus (USB) with the high-performance ARM Cortex-M3 32-bit RISC core operating at a 32 MHz frequency, a memory protection unit (MPU), high-speed embedded memories (Flash memory up to 128 Kbytes and RAM up to 16 Kbytes) and an extensive range of enhanced I/Os and peripherals connected to two APB buses. All devices offer a 12-bit ADC, 2 DACs and 2 ultralow power comparators, six general-purpose 16-bit timers and two basic timers, which can be used as time bases. Moreover, the STM32L15xxx devices contain standard and advanced communication interfaces: up to two I2Cs and SPIs, three USARTs and a USB.

The STM32L15xxx devices offer up to 20 capacitive sensing channels to simply add touch sensing functionality to any application. They also include a real-time clock and a set of backup registers that remain powered in Standby mode. Finally, the integrated LCD controller has a built-in LCD voltage generator that allows you to drive up to 8 multiplexed LCDs with contrast independent of the supply voltage. The ultralow power STM32L15xxx operates 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. It is available in the -40 to +85 ℃ temperature range, extended to 105℃ in low power dissipation state. A comprehensive set of power-saving modes allows the design of low-power applications.

These features make the ultralow power STM32L15xxx microcontroller family suitable for a wide range of applications:

• Medical and handheld equipment

• Application control and user interface

• PC peripherals, gaming, GPS and sport equipment

• Alarm systems, Wired and wireless sensors, Video intercom

• Utility metering

STM32L15xxx主要特性:

• Ultra-low-power platform

– 1.65 V to 3.6 V power supply

– -40℃ to 85℃/105℃ temperature range

– 0.3 μA Standby mode (3 wakeup pins)

– 0.9 μA Standby mode + RTC

– 0.57 μA Stop mode (16 wakeup lines)

– 1.2 μA Stop mode + RTC

– 9 μA Low-power Run mode

– 214 μA/MHz Run mode

– 10 nA ultra-low I/O leakage

– 8 μs wakeup time

• Core: ARM® Cortex™-M3 32-bit CPU

– From 32 kHz up to 32 MHz max

– 33.3 DMIPS peak (Dhrystone 2.1)

– Memory protection unit

• 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 24 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

– PLL for CPU clock and USB (48 MHz)

• Pre-programmed bootloader

– USART supported

• Development support

– Serial wire debug supported

– JTAG and trace supported

• Up to 83 fast I/Os (73 I/Os 5V tolerant), all mappable on 16 external interrupt vectors

• Memories

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