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ST公司的STM32 F4系列是高性能的基于ARM Cortex M4的32位微控制器,工作頻率高達(dá)168MHz. Cortex M4具有浮點(diǎn)單元(FPU)但精度,支持所有的ARM單精度數(shù)據(jù)處理指令和數(shù)據(jù)類型,具有DSP指令和自適應(yīng)的實(shí)時(shí)加速器(ART),允許從閃存中零等待狀態(tài)實(shí)現(xiàn),存儲器保護(hù)單元和210 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1).主要用在馬達(dá)驅(qū)動和應(yīng)用控制,醫(yī)療設(shè)備,工業(yè)應(yīng)用如PLC,逆變器,電路斷路器,打印機(jī)和掃描儀,告警系統(tǒng),HVAC和家庭音頻設(shè)備.本文介紹了STM32F407xx系列主要特性,方框圖以及STM3240G-EVAL評估板主要特性, 評估板硬件布局和配置圖, 元件布局圖和詳細(xì)電路圖. The STM32F405xx and STM32F407xx family is based on the high-performance ARM® Cortex™-M4 32-bit RISC core operating at a frequency of up to 168 MHz. The 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 Cortex-M4 core with FPU will be referred to as Cortex-M4F throughout this document. The STM32F405xx and STM32F407xx family incorporates high-speed embedded memories (Flash memory up to 1 Mbyte, up to 192 Kbytes of SRAM), up to 4 Kbytes of backup 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 three 12-bit ADCs, two DACs, a low-power RTC, twelve general-purpose16-bit timers including two PWM timers for motor control, two general-purpose 32-bit timers. a true random number generator (RNG). They also feature standard and advanced communication interfaces. ● Up to three I2Cs ● Three SPIs, two I2Ss full duplex. 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. ● Four USARTs plus two UARTs ● An USB OTG full-speed and a USB OTG high-speed with full-speed capability (with the ULPI), ● Two CANs ● An SDIO/MMC interface ● Ethernet and the camera interface available on STM32F407xx devices only. The STM32F405xx and STM32F407xx family operates in the –40 to +105 ℃ temperature range from a 1.8 to 3.6 V power supply. The supply voltage can drop to 1.7 V when the device operates in the 0 to 70 ℃ temperature range and PDR is disabled. A comprehensive set of power-saving mode allows the design of low-power applications. The STM32F405xx and STM32F407xx family offers devices in four packages ranging from 64 pins to 176 pins. The set of included peripherals changes with the device chosen. STM32F407xx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 168 MHz, memory protection unit, 210 DMIPS/1.25 DMIPS/MHz (Dhrystone 2.1), and DSP Instructions ■ Memories – Up to 1 Mbyte of Flash memory – Up to 192+4 Kbytes of SRAM including 64-Kbyte of CCM (core coupled memory) data RAM – Flexible static memory controller supporting Compact Flash, SRAM,PSRAM, NOR and NAND memories ■ LCD parallel interface, 8080/6800 modes ■ Clock, reset and supply management – 1.8 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 (1% accuracy) – 32 kHz oscillator for RTC with calibration – Internal 32 kHz RC with calibration ● Low power – Sleep, Stop and Standby modes – VBAT supply for RTC, 20×32 bit backup registers + optional 4 KB backup SRAM ■ 3×12-bit, 2.4 MSPS A/D converters: up to 24 channels and 7.2 MSPS in triple interleaved mode ■ 2×12-bit D/A converters ■ General-purpose DMA: 16-stream DMA controller with FIFOs and burst support ■ Up to 17 timers: up to twelve 16-bit and two 32- bit timers up to 168 MHz, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input ■ Debug mode – Serial wire debug (SWD) & JTAG interfaces – Cortex-M4 Embedded Trace Macrocell™ ■ Up to 140 I/O ports with interrupt capability – Up to 136 fast I/Os up to 84 MHz – Up to 138 5 V-tolerant I/Os ■ Up to 15 communication interfaces – Up to 3 × I2C interfaces (SMBus/PMBus) – Up to 4 USARTs/2 UARTs (10.5 Mbit/s, ISO 7816 interface, LIN, IrDA, modem control) – Up to 3 SPIs (37.5 Mbits/s), 2 with muxed full-duplex I2S to achieve audio class accuracy via internal audio PLL or external clock 2 × CAN interfaces (2.0B Active) – SDIO interface ■ Advanced connectivity – USB 2.0 full-speed device/host/OTG controller with on-chip PHY USB 2.0 high-speed/full-speed device/host/OTG controller with dedicated DMA, on-chip full-speed PHY and ULPI – 10/100 Ethernet MAC with dedicated DMA: supports IEEE 1588v2 hardware, MII/RMII ■ 8- to 14-bit parallel camera interface up to 54 Mbytes/s ■ True random number generator ■ CRC calculation unit ■ 96-bit unique ID ■ RTC: subsecond accuracy, hardware calendar STM32F407xx主要應(yīng)用: These features make the STM32F405xx and STM32F407xx microcontroller family 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 
圖1.STM32F40x系列方框圖 STM3240G-EVAL評估板 The STM3240G-EVAL evaluation board is a complete demonstration and development platform for the STM32F4 series and includes an embedded STM32F407IGH6 highperformance ARM®Cortex™-M4F 32-bit microcontroller. The full range of hardware features on the board is provided to help you evaluate all peripherals (USB OTG HS, USB OTG FS, ethernet, motor control, CAN, MicroSD Card™,smartcard, USART, Audio DAC, RS-232, IrDA, SRAM, MEMS, EEPROM… etc.) and develop your own applications. Extension headers make it possible to easily connect a daughter board or wrapping board for your specific application. The in-circuit ST-LINK/V2 tool can be easily used for JTAG and SWD interface debugging and programming.
圖2. STM3240G-EVAL評估板外形圖 STM3240G-EVAL評估板主要特性: ■ STM32F407IGH6 microcontroller. ■ 16 Mbit SRAM ■ 1 Gbyte or more MicroSD Card ■ Boot from user Flash, system memory or SRAM ■ Both ISO/IEC 14443 type A and B smartcard support ■ I2C compatible serial interface 8 Kbytes EEPROM, MEMS and I/O expander ■ IEEE 802.3-2002 compliant ethernet connector ■ Two CAN 2.0 A/B channels on the same DB connector ■ RS-232 communication ■ IrDA transceiver ■ USB OTG (HS and FS) with Micro-AB connector ■ Inductor motor control connector ■ I2S Audio DAC, stereo audio jack for headset ■ 3.2" 240x320 TFT color LCD with touchscreen ■ 4 color LEDs ■ Camera module and extension connector for ST camera plug-in ■ Joystick with 4-direction control and selector ■ Reset, wakeup, tamper and user button ■ RTC with backup battery ■ Extension connector for daughterboard or wrapping board ■ JTAG, SWD and trace debug support ■ Embedded ST-LINK/V2 ■ Five 5 V power supply options: Power jack, USB FS connector, USB HS connector,ST-LINK/V2 or daughterboard
圖3. STM3240G-EVAL評估板硬件布局和配置圖
圖4. STM3240G-EVAL評估板元件布局圖
圖5. STM3240G-EVAL評估板電路圖(1)
圖6. STM3240G-EVAL評估板電路圖(2)
圖7. STM3240G-EVAL評估板電路圖(3)
圖8. STM3240G-EVAL評估板電路圖(4)
圖9. STM3240G-EVAL評估板電路圖(5)
圖10. STM3240G-EVAL評估板電路圖(6)
圖11. STM3240G-EVAL評估板電路圖(7)
圖12. STM3240G-EVAL評估板電路圖(8)
圖13. STM3240G-EVAL評估板電路圖(9)
圖14. STM3240G-EVAL評估板電路圖(10)
圖15. STM3240G-EVAL評估板電路圖(11)
圖16. STM3240G-EVAL評估板電路圖(12)
圖17. STM3240G-EVAL評估板電路圖(13)
圖18. STM3240G-EVAL評估板電路圖(14)
圖19. STM3240G-EVAL評估板電路圖(15)
圖20. STM3240G-EVAL評估板電路圖(16)
圖21. STM3240G-EVAL評估板電路圖(17)
圖22. STM3240G-EVAL評估板電路圖(18)
圖23. STM3240G-EVAL評估板電路圖(19)
圖24. STM3240G-EVAL評估板電路圖(20)
圖25. STM3240G-EVAL評估板電路圖(21) 詳情請見: 
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