原标题：Keil ST STM32F407评估开发方案

　　Keil公司的MCBstm32F400 评估板采用ST公司的STM32F407IG器件,它是基于168MHz ARM Cortex™-M4的MCU,176引脚BGA封装,具有1MB Flash & 192KB RAM,外接存储器8MB NOR Flash, 512MB NAND Flash, 2MB SRAM, 8KB I2C EEPROM, 采用电阻触摸屏的2.4吋彩色QVGA TFT LCD,10/100以太网端口,主要用在马达驱动和应用控制,医疗设备,工业应用如PLC,逆变器,电路中断器,打印机和扫描仪,告警系统,视频互连,HVAC以及家庭音响设备.本文介绍了STM32F405xx和STM32F407xx 主要特性,方框图,MCBSTM32F400评估板主要特性,技术指标,方框图以及电路图和PCB元件布局图.

　　STM32F405xx/STM32F407xx:ARM Cortex-M4 32b MCU+FPU, 210DMIPS, up to 1MB Flash/192+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

　　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-M4core features a Floating point unit (FPU) single precision which supports all ARM singleprecision 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-purpose 16-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. New advanced peripherals include an SDIO, an enhanced flexible static memory control (FSMC) interface (for devices offered in packages of 100 pins and more), a camera interface for CMOS sensors.

　　The STM32F405xx and STM32F407xx family operates in the –40 to +105 °C 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 °C 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.

　　These features make the STM32F405xx and STM32F407xx microcontroller family suitable for a wide range of applications:

　　STM32F405xx和STM32F407xx 主要应用:

　　● 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

　　STM32F405xx和STM32F407xx 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™

　　1. The WLCSP90 package will soon be available.

　　■ 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

　　图1.STM32F405xx和STM32F407xx 方框图

　　MCBSTM32F400评估板

　　The MCBSTM32F400 Evaluation Board ships with the STM32F407IG device that is a superset of several other device variants of the STM32F407x microcontroller series. The MCBSTM32F200 and MCBSTM32F400 boards contain all the hardware components required in a single-chip STM32x system.

　　The Keil MCBSTM32F400 Evaluation Board enables you to create and test working programs based on the STMicroelectronics STM32 F4xx series of ARM Cortex™-M4 processor-based devices.

　　MCBSTM32F400评估板主要特性:

　　168MHz STM32F407IG ARM Cortex™-M4 processor-based MCU in 176-pin BGA

　　On-Chip Memory: 1MB Flash & 192KB RAM

　　External Memory: 8MB NOR Flash, 512MB NAND Flash, 2MB SRAM, 8KB I2C EEPROM with NFC interface

　　2.4 inch Color QVGA TFT LCD with resistive touchscreen

　　10/100 Ethernet Port

　　USB 2.0 Full Speed - USB, USB-OTG, & USB Host

　　USB 2.0 High Speed - USB, USB-OTG, & USB Host

　　1 CAN Interface

　　Serial/UART Port

　　MicroSD Card Interface

　　5-position Joystick

　　3-axis digital Accelerometer

　　3-axis digital Gyroscope

　　Analog Voltage Control for ADC Input (potentiometer)

　　Audio CODEC with Line-In/Out and Speaker/Microphone

　　Digital Microphone

　　Digital VGA Camera

　　Push-Buttons for Reset, Wakeup, Tamper and User

　　8 LEDs directly connected to port pins

　　Power Supply via:

　　High Speed and Full Speed USB (micro) connectors

　　Power jack (8V-12V) with Voltage Regulator capable to supply both USB host interfaces (500mA each)

　　Debug Interface Connectors

　　20 pin JTAG (0.1 inch connector)

　　10 pin Cortex debug (0.05 inch connector)

　　20-pin Cortex debug + ETM Trace (0.05 inch connector)

　　图2.MCBSTM32F400评估板外形图

Note

　　The MCBSTM32F200 and MCBSTM32F400 use the same base board and on-chip peripherals. Only the MCU is different between the two boards.

　　MCBSTM32F400评估板技术指标:

　　The hardware block diagram displays the input, configuration, power system, and User I/O on the board. This visual presentation helps you to understand the MCBSTM32F200 board components.

　　图3.MCBSTM32F400评估板方框图