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ST公司的STM32L152是超低功耗,高數據安全性,高效能的ARM Cortex-M3微控制器系列芯片。低功耗運行模式電流為10.4μA，工作電壓為1.8～3.6 V。在32 MHz頻率下的處理性能達到33 DMOPS(最大值)，可提供出色的計算性能和對事件的卓越系統響應，同時可應對動態和靜態功率限制的挑戰。主要應用在低功耗醫療和手提設備,工業控制和用戶接口,PC外設,游戲和GPS設備,有線和無線傳感器,告警系統和公用表.本文介紹了STM32L152主要特性,方框圖,以及STM32L152-EVAL評估板主要特性,電路圖和元件布局圖. 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. 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 °C temperature range. A comprehensive set of power-saving modes allows the design of low-power applications. This datasheet provides the ordering information and mechanical device characteristics of the STM32L151xx and STM32L152xx ultralow power ARM Cortex™-based microcontrollers product line. The ultralow power STM32L15xxx family includes devices in 3 different package types: from 48 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 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 STM32L152主要特性: ■ Operating conditions – Operating power supply range: 1.65 V to 3.6 V (without BOR) or 1.8 V to 3.6 V (with BOR option) – Temperature range: –40 to 85 °C ■ Low power features – 4 modes: Sleep, Low-power run (9 μA at 32 kHz), Low-power sleep (4.4 μA), Stop with RTC (1.45 μA), Stop (570 nA), Standby (300 nA) – Dynamic core voltage scaling down to 233 μA/MHz Ultralow leakage per I/O: 50 nA – Fast wakeup from Stop: 8 μs – Three wakeup pins ■ Core: ARM 32-bit Cortex™-M3 CPU – 32 MHz maximum frequency, 33.3 DMIPS peak (Dhrystone 2.1) – Memory protection unit ■ Reset and supply management – Low power, ultrasafe BOR (brownout reset) with 5 selectable thresholds – Ultralow power POR/PDR – Programmable voltage detector (PVD) ■ Clock management – 1 to 24 MHz crystal oscillator – 32 kHz oscillator for RTC with calibration – Internal 16 MHz factory-trimmed RC – Internal 37 kHz low consumption RC – Internal multispeed low power RC, 64 kHz to 4 MHz with a consumption down to 1.5 μA – PLL for CPU clock and USB (48 MHz) ■ Low power calendar RTC – Alarm, periodic wakeup from Stop/Standby ■ Memories – Up to 128 Kbyte of Flash memory with ECC – 4 Kbyte of data EEPROM with ECC – Up to 16 Kbyte of RAM ■ Up to 83 fast I/Os (73 of which are 5 V-tolerant) all mappable on 16 external interrupt vectors ■ Development support – Serial wire debug, JTAG and trace ■ DMA: 7-channel DMA controller, supporting timers, ADC, SPIs, I2Cs and USARTs ■ LCD 8 × 40 or 4 × 44 with step-up converter ■ 12-bit ADC up to 1 Msps/24 channels – Temperature sensor and internal voltage reference – Operates down to 1.8 V ■ 2 × 12-bit DACs with output buffers ■ 2 ultralow power comparators – Window mode and wakeup capability ■ 10 timers: – 6 × 16-bit general-purpose timers, each with up to 4 IC/OC/PWM channels – 2 × 16-bit basic timers – 2 × watchdog timers (independent and window) ■ Up to 8 communication interfaces – Up to 2 × I2C interfaces (SMBus/PMBus) – Up to 3 × USARTs (ISO 7816 interface, LIN, IrDA capability, modem control) Up to 2 × SPIs (16 Mbit/s) – USB 2.0 full speed interface CRC calculation unit, 96-bit unique ID 
圖1.STM32L152方框圖 STM32L152-EVAL評估板 The STM32L152-EVAL evaluation board is a complete demonstration and development platform for STMicroelectronics’ ARM cortex-M3 core-based STM32L152VBT6 microcontroller supporting two I2C, two SPI and three USART channels, 12-bit ADC, 12-bit DAC, 16 KB internal SRAM and 128 KB Flash, USB FS, LCD controller, touch sensing and JTAG debugging support. The full range of hardware features on the board helps you evaluate all peripherals (USB FS, USART, Audio DAC, microphone ADC, dot-matrix LCD, LCD glass, IrDA, light dependant resistor (LDR), MicroSD CardTM and temperature sensor amongst others) and develop your own applications. Extension headers make it possible to easily connect a daughter board or wrapping board for your specific application. An ST-LINK/V2 is integrated on the board as embedded in-circuit debugger and programmer for the STM32 MCU.
圖2. STM32L152-EVAL評估板外形圖 STM32L152-EVAL評估板主要特性: ● Four 5 V power supply options: – Power jack ST-LINK/V2 USB connector User USB connector – Daughterboard ● Audio speaker and microphone connected to DAC and ADC of STM32L152VBT6 ● 2 GByte or more SPI interface MicroSD CardTM ● I2C compatible serial interface temperature sensor ● RS-232 communication ● IrDA transceiver ● JTAG and trace debug support, ST-LINK/V2 embedded. ● 240x320 TFT color LCD connected to SPI interface of STM32L152VBT6 ● Joystick with 4-direction control and selector ● Reset button ● Tamper or Key button ● 4 color user LEDs and 3 LEDs as MCU power range indicator ● MCU consumption measurement circuit ● LCD glass 32 x 4 segments connected to LCD controller in STM32L152VBT6 ● Extension connector for daughterboard or wrapping board ● MCU voltage choice of 3.3 V or adjustable from 1.65 V to 3.6 V ● USB FS connector ● Two touch sensing buttons ● Light dependent resistor (LDR) ● Potentiometer
圖3.STM32L152-EVAL評估板方框圖
圖4.STM32L152-EVAL評估板電路圖:STM32L152-EVAL
圖5.STM32L152-EVAL評估板電路圖: MCU
圖6.STM32L152-EVAL評估板電路圖  CD glass
圖7.STM32L152-EVAL評估板電路圖:Audio
圖8.STM32L152-EVAL評估板電路圖:外設
圖9.STM32L152-EVAL評估板電路圖:電源
圖10.STM32L152-EVAL評估板電路圖:擴展連接器
圖11.STM32L152-EVAL評估板電路圖: LCD和SD卡
圖12.STM32L152-EVAL評估板電路圖: RS-232和IrDA
圖13.STM32L152-EVAL評估板電路圖: IDD測試
圖14.STM32L152-EVAL評估板電路圖:溫度傳感器
圖15.STM32L152-EVAL評估板電路圖: ST-LINK
圖16.STM32L152-EVAL評估板電路圖: JTAG和Trace
圖17.STM32L152-EVAL評估板電路圖:觸摸檢測
圖18.STM32L152-EVAL評估板元件布局圖 詳情請見: 
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