原标题：ST STM32F401xD/xE系列32位MCU开发方案

　　The STM32F401XD/XE devices are based on the high-performance ARM® Cortex® -M4 32- bit RISC core operating at a frequency of up to 84 MHz. Its Cortex®-M4 core features a Floating point unit (FPU) single precision which supports all ARM single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. The STM32F401xD/xE incorporate high-speed embedded memories (512 Kbytes of Flash memory， 96 Kbytes of SRAM)， and an extensive range of enhanced I/Os and peripherals connected to two APB buses， two AHB buses and a 32-bit multi-AHB bus matrix. All devices offer one 12-bit ADC， a low-power RTC， six general-purpose 16-bit timers including one PWM timer for motor control， two general-purpose 32-bit timers. They also feature standard and advanced communication interfaces.

　　• Up to three I2Cs

　　• Up to four SPIs

　　• Two full duplex I2Ss. To achieve audio class accuracy， the I2S peripherals can be clocked via a dedicated internal audio PLL or via an external clock to allow synchronization.

　　• Three USARTs

　　• SDIO interface

　　• USB 2.0 OTG full speed interface

　　Refer to for the peripherals available for each part number.

　　The STM32F401xD/xEoperate in the –40 to +105 ℃ temperature range from a 1.7 (PDR OFF) to 3.6 V power supply. A comprehensive set of power-saving mode allows the design of low-power applications.

　　These features make the STM32F401xD/xE microcontrollers suitable for a wide range of applications：

　　• Motor drive and application control

　　• Medical equipment

　　• Industrial applications： PLC， inverters， circuit breakers

　　• Printers， and scanners

　　• Alarm systems， video intercom， and HVAC

　　• Home audio appliances

　　• Mobile phone sensor hub

　　STM32F401xD/xE系列主要特性：

　　• Core： ARM® 32-bit Cortex®-M4 CPU with FPU， Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait state execution from Flash memory， frequency up to 84 MHz， memory protection unit， 105 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1)， and DSP instructions

　　• Memories

　　up to 512 Kbytes of Flash memory

　　– up to 96 Kbytes of SRAM

　　• Clock， reset and supply management

　　– 1.7 V to 3.6 V application supply and I/Os

　　– POR， PDR， PVD and BOR

　　– 4-to-26 MHz crystal oscillator

　　– Internal 16 MHz factory-trimmed RC

　　– 32 kHz oscillator for RTC with calibration

　　– Internal 32 kHz RC with calibration

　　• Power consumption

　　– Run： 146 μA/MHz (peripheral off)

　　– Stop (Flash in Stop mode， fast wakeup time)： 42 μATyp@25C;65 μA max @25℃

　　– Stop (Flash in Deep power down mode， fast wakeup time)： down to 10 μA @ 25 ℃;30 μA max @25℃

　　– Standby： 2.4 μA @25℃ / 1.7 V without RTC; 12 μA @85℃ @1.7 V

　　– VBAT supply for RTC： 1 μA @25℃

　　• 1×12-bit， 2.4 MSPS A/D converter： up to 16 channels

　　• General-purpose DMA： 16-stream DMA controllers with FIFOs and burst support

　　• Up to 11 timers： up to six 16-bit， two 32-bit timers up to 84 MHz， each with up to four IC/OC/PWM or pulse counter and quadrature (incremental) encoder input， two watchdog timers (independent and window) and a SysTick timer

　　• Debug mode

　　– Serial wire debug (SWD) & JTAG interfaces

　　– Cortex ? -M4 Embedded Trace Macrocell™

　　• Up to 81 I/O ports with interrupt capability

　　– Up to 78 fast I/Os up to 42 MHz

　　– All I/O ports are 5 V-tolerant

　　• Up to 12 communication interfaces

　　– Up to 3 x I2C interfaces (SMBus/PMBus)

　　– Up to 3 USARTs (2 x 10.5 Mbit/s， 1 x 5.25 Mbit/s)， ISO 7816 interface， LIN，IrDA， modem control)

　　– Up to 4 SPIs (up to 42Mbit/s at fCPU = 84 MHz)， SPI2 and SPI3 with muxed full-duplex I2S to achieve audio class accuracy via internal audio PLL or external clock

　　– SDIO interface

　　– Advanced connectivity： USB 2.0 full-speed device/host/OTG controller with on-chip PHY • CRC calculation unit

　　• 96-bit unique ID

　　• RTC： subsecond accuracy， hardware calendar

　　• All packages (WLCSP49， LQFP64/100， UFQFPN48， UFBGA100) are ECOPACK®2

　　图1.STM32F401xD/xE系列框图

　　图2. STM32F401xD/xE系列电源方案图

　　评估板STM32 Nucleo-64板

　　The STM32 Nucleo-64 boards provide an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontrollers， choosing from various combinations of performance， power consumption and features. For the compatible boards， the SMPS significantly reduces power consumption in Run mode.

　　The Arduino™ Uno V3 connectivity support and the ST morpho headers allow the easy expansion of the functionality of the STM32 Nucleo open development platform with a wide choice of specialized shields.

　　The STM32 Nucleo-64 boards (NUCLEO-F030R8， NUCLEO-F070RB， NUCLEO-F072RB， NUCLEO-F091RC， NUCLEO-F103RB， NUCLEO-F302R8， NUCLEO-F303RE， NUCLEO-F334R8， NUCLEO-F401RE， NUCLEO-F410RB， NUCLEO-F411RE， NUCLEO-F446RE， NUCLEO-L010RB， NUCLEO-L053R8， NUCLEO-L073RZ， NUCLEO-L152RE， NUCLEO-L452RE， NUCLEO-L476RG) provide an affordable and flexible way for users to try out new concepts and build prototypes with the STM32 microcontrollers in LQFP64 package， choosing from the various combinations of performance， power consumption and features. The Arduino™ Uno V3 connectivity support and the ST morpho headers allow to expand easily the functionality of the Nucleo open development platform with a wide choice of specialized shields. The STM32 Nucleoboards do not require any separate probe as they integrate the ST-LINK/V2-1 debugger and programmer. The STM32 Nucleo boards come with the STM32 comprehensive software HAL library together with various packaged software examples， as well as direct access to the Arm® Mbed™ online resources at 。

　　图3.评估板STM32 Nucleo-64板外形图

　　评估板STM32 Nucleo-64板主要特性：

　　• STM32 microcontroller in LQFP64 package

　　• Three LEDs： – USB communication (LD1)， user LED (LD2)， power LED (LD3)

　　• Two push-buttons： USER and RESET

　　• Two types of extension resources

　　– Arduino™ Uno V3 connectivity

　　– ST morpho extension pin headers for full access to all STM32 I/Os

　　• Flexible board power supply：

　　– USB VBUS or external source (3.3 V， 5 V， 7 - 12 V)

　　– Power management access point

　　• On-board ST-LINK/V2-1 debugger and programmer with SWD connector

　　– Selection-mode switch to use the kit as a standalone ST-LINK/V2-1

　　• USB re-enumeration capability. Three different interfaces supported on USB： – Virtual COM port

　　– Mass storage

　　– Debug port

　　• Comprehensive free software HAL library including a variety of software examples

　　• Arm® Mbed™ (see )

　　图4.评估板STM32 Nucleo-64板硬件框图

　　图5.评估板STM32 Nucleo-64板顶层布局图

　　图6.评估板STM32 Nucleo-64板底层布局图

　　图7.评估板STM32 Nucleo-64板顶层和电源电路图

　　图8.评估板STM32 Nucleo-64板电路图：STM32 MCU

　　图9.评估板STM32 Nucleo-64板电路图：ST-LINK/V2-1

　　图10.评估板STM32 Nucleo-64板电路图扩展连接器

　　评估板STM32 Nucleo-64板材料清单见：

　　Nucleo_64_Assembly_F030R8.xls

　　Nucleo_64_Assembly_F030R8