原标题：ST STM32F756xx系列高性能32位MCU开发方案

　　ST公司的STM32F756xx系列是基于高性能ARM®Cortex®-M7内核的32位RISC MCU,工作频率高达216MHz,具有单浮点单元(SFPU)精度,支持所有的ARM单精度数据处理指令和数据类型.集成了高达1MB闪存,320KB SRAM,16KB TCM RAM,4KB备份SRAM,满足高速或多通道音视频,无线通信,运动识别或电机控制的需求.本文介绍了STM32F756xx系列主要特性,框图,以及评估板STM32756G-EVAL主要特性,框图,电路图和材料清单.

　　The STM32F756xx devices are based on the high-performance ARM®Cortex®-M7 32-bit RISC core operating at up to 216 MHz frequency. The Cortex®-M7 core features a single floating point unit (SFPU) 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 the application security.

　　The STM32F756xx devices incorporate high-speed embedded memories with Flash memory up to 1 Mbyte, 320 Kbytes of SRAM (including 64 Kbytes of Data TCM RAM for critical real time data), 16 Kbytes of instruction TCM RAM (for critical real time routines), 4 Kbytes of backup SRAM available in the lowest power modes, and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses, a 32-bit multi-AHB bus matrix and a multi layer AXI interconnect supporting internal and external memories access.

　　All devices offer three 12-bit ADCs, two DACs, a low-power RTC, thirteen general-purpose 16-bit timers including two PWM timers for motor control and one low-power timer available in Stop mode, two general-purpose 32-bit timers, a true random number generator (RNG), and a cryptographic acceleration cell. They also feature standard and advanced communication interfaces.

　　STM32F756xx系列主要特性:

　　Core: ARM® 32-bit Cortex®-M7 CPU with FPU, adaptive real-time accelerator (ART Accelerator™) and L1-cache: 4KB data cache and 4KB instruction cache, allowing 0-wait state execution from embedded Flash memory and external memories, frequency up to 216 MHz, MPU, 462 DMIPS/2.14 DMIPS/MHz (Dhrystone 2.1), and DSP instructions.

　　Memories

　　Up to 1MB of Flash memory

　　1024 bytes of OTP memory

　　SRAM: 320KB (including 64KB of data TCM RAM for critical real time data) + 16KB of instruction TCM RAM (for critical real time routines) + 4KB of backup SRAM (available in the lowest power modes)

　　Flexible external memory controller with up to 32-bit data bus: SRAM, PSRAM, SDRAM/LPSDR SDRAM, NOR/NAND memories

　　Dual mode Quad-SPI

　　LCD parallel interface, 8080/6800 modes

　　LCD-TFT controller up to XGA resolution with dedicated Chrom-ART Accelerator™ for enhanced graphic content creation (DMA2D)

　　Clock, reset and supply management

　　1.7 V to 3.6 V application supply and I/Os

　　POR, PDR, PVD and BOR

　　Dedicated USB power

　　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

　　VBATsupply for RTC, 32×32 bit backup registers + 4KB backup SRAM

　　3×12-bit,2.4 MSPS ADC: up to 24 channels and 7.2 MSPS in triple interleaved mode

　　2×12-bit D/A converters

　　Up to 18 timers: up to thirteen 16-bit (1x low- power 16-bit timer available in Stop mode) and two 32-bit timers, each with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input. All 15 timers running up to 216 MHz. 2x watchdogs, SysTick timer

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

　　Debug mode

　　SWD & JTAG interfaces

　　Cortex®-M7 Trace Macrocell™

　　Up to 168 I/O ports with interrupt capability

　　Up to 164 fast I/Os up to 108 MHz

　　Up to 166 5 V-tolerant I/Os

　　Up to 25 communication interfaces

　　Up to 4× I2C interfaces (SMBus/PMBus)

　　Up to 4 USARTs/4 UARTs (27 Mbit/s, ISO7816 interface, LIN, IrDA, modem control)

　　Up to 6 SPIs (up to 50 Mbits/s),3 with muxed simplex I2S for audio class accuracy via internal audio PLL or external clock

　　2 x SAIs (serial audio interface)

　　2 × CANs (2.0B active) and SDMMC interface

　　SPDIFRX interface

　　HDMI-CEC

　　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

　　Cryptographic acceleration: hardware acceleration for AES 128, 192, 256, triple DES, HASH (MD5, SHA-1, SHA-2), and HMAC

　　True random number generator

　　CRC calculation unit

　　RTC: subsecond accuracy, hardware calendar

　　96-bit unique ID

　　图1.STM32F756xx系列框图

　　评估板STM32756G-EVAL

　　The STM32756G-EVAL evaluation board is a complete demonstration and development platform for STMicroelectronics ARM® Cortex®-M7 core-based STM32F756NGH6 microcontrollers. It features four I2C interfaces, six SPIs with three mutiplexed simplex I2S interfaces, SDMMC, four USARTs, two CANs, three 12-bit ADCs, two 12-bit DACs, two SAIs, 8- to 14-bit digital camera module interface, internal 320+4 Kbytes SRAM and 1 Mbytes Flash, USB HS OTG and USB FS OTG, Ethernet MAC, FMC interface, Quad-SPI interface, Cryptographic acceleration, JTAG debugging support. This evaluation board can be used as a reference design for user application development but it is not considered as a final application.

　　The full range of hardware features on the board helps the user to evaluate all peripherals (USB OTG HS, USB OTG FS, Ethernet, Motor Control, CAN, microSD Card, USART, Audio DAC and ADC, digital microphone, IrDA, RF-EEPROM, SRAM, Nor Flash, SDRAM, Quad-SPI Flash, 5.7" TFT LCD with capacitive touch panel and others) and develop his own applications. Extension headers make it possible to easily connect a daughterboard for a specific application. The integrated ST-LINK/V2-1 provides an embedded in-circuit debugger and programmer for the STM32 MCU.

　　评估板STM32756G-EVAL主要特性:

　　STM32F756NGH6 microcontroller with 1 Mbyte Flash and 320+4 Kbytes RAM

　　Six 5 V power supply options:

　　Power jack

　　ST-LINK/V2-1 USB connector

　　User USB HS connector

　　User USB FS1 connector

　　User USB FS2 connector

　　Daughterboard

　　SAI Audio DAC, stereo audio jack which supports headset with microphone

　　Stereo digital microphone, audio jack connector used to connect external speakers

　　2 Gbytes (or more) SDMMC interface microSD card

　　RF-EEPROM on I2C compatible serial interface

　　RS-232 communication

　　IrDA transceiver

　　JTAG/SWD and ETM trace debug support, ST-LINK/V2-1 embedded

　　IEEE-802.3-2002 compliant Ethernet connector

　　Camera module

　　8Mx32bit SDRAM, 1Mx16bit SRAM & 8Mx16bit Nor Flash

　　512MbitsQuadSPI Nor Flash

　　5.7 inch 640x480 pixel TFT color LCD with capacitive touch panel

　　Joystick with 4-direction control and selector.

　　Reset, WakeUp/Tamper or key button

　　4 color user LEDs

　　Extension connectors and memory connectors for daughterboard or wrapping board

　　USB OTG HS and FS with Micro-AB connectors

　　RTC with backup battery

　　CAN 2.0A/B compliant connection

　　Potentiometer

　　Motor control connector

　　图2.评估板STM32756G-EVAL外形图

　　图3.评估板STM32756G-EVAL框图