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电路设计->综合电路图->综合电路图->ST STM32F746 32位ARMCortex-M7 MCU开发方案

ST STM32F746 32位ARMCortex-M7 MCU开发方案

作者:angelazhang时间:2015-08-06

ST公司的STM32F745xx和STM32F746xx系列采用高性能ARMCortex-M7 32位RISC内核,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,还能实现DSP指令集和增强应用安全性的存储器保护单元(MPU),工作电压1.7到3.6 V,主要用在马达驱动和应用控制,医疗设备,工业控制如PLC,逆变器和电路中断器,打印机和扫描仪,告警系统,视频互连和HVAC,家用音频设备,移动设备和物联网以及智能手表等.本文介绍了STM32F745xx和STM32F746xx系列主要特性,框图,STM32F746G-DISCO开发板32F746GDISCOVERY主要特性,框图,电路图,材料清单和PCB元件布局图.

The STM32F745xx and STM32F746xx 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 STM32F745xx and STM32F746xx devices incorporate high-speed embedded memories with Flash memory up to 1 Mbyte, 320 KB of SRAM (including 64 KB of Data TCM RAM for critical real time data), 16 KB of instruction TCM RAM (for critical real time routines), 4 KB 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). They also feature standard and advanced communication interfaces. 

Advanced peripherals include an SDMMC interface, a flexible memory control (FMC) interface, a Quad SPI Flash memory interface, a camera interface for CMOS sensors. 

The STM32F745xx and STM32F746xx devices operate in the –40 to +105 °C temperature range from a 1.7 to 3.6 V power supply. A dedicated supply input for USB (OTG_FS and OTG_HS) is available on all the packages except LQFP100 for a greater power supply choice.

The supply voltage can drop to 1.7 V with the use of an external power supply supervisor 

• Up to four I2Cs 
• Six SPIs, three I2Ss in duplex mode. To achieve the 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 four UARTs 
• An USB OTG full-speed and a USB OTG high-speed with full-speed capability (with the ULPI), 
• Two CANs 
• Two SAI serial audio interfaces 
• An SDMMC host interface 
• Ethernet and camera interfaces 
• LCD-TFT display controller 
• Chrom-ART Accelerator™ 
• SPDIFRX interface 
• HDMI-CEC

Advanced peripherals include an SDMMC interface, a flexible memory control (FMC) interface, a Quad SPI Flash memory interface, a camera interface for CMOS sensors.

The STM32F745xx and STM32F746xx devices operate in the –40 to +105 °C temperature range from a 1.7 to 3.6 V power supply. A dedicated supply input for USB (OTG_FS and OTG_HS) is available on all the packages except LQFP100 for a greater power supply choice.

The supply voltage can drop to 1.7 V with the use of an external power supply supervisor.

The STM32F745xx and STM32F746xx devices offer devices in 7 packages ranging from 100 pins to 216 pins.

STM32F745xx和STM32F746xx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 
– VBAT supply 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 
• True random number generator 
• CRC calculation unit 
• RTC: subsecond accuracy, hardware calendar 
• 96-bit unique ID

STM32F745xx和STM32F746xx系列主要应用:

• 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, 
• Mobile applications, Internet of Things, 
• Wearable devices: smartwatches.

图1。STM32F745xx和STM32F746xx系列框图

STM32F746G-DISCO开发板32F746GDISCOVERY

The STM32F746G-DISCO discovery board (32F746GDISCOVERY) is a complete demonstration and development platform for STMicroelectronics ARM® Cortex®-M7 core-based STM32F746NGH6 microcontroller. This microcontroller features four I2Cs, six SPIs with three multiplexed simplex I2S, SDMMC, four USARTs, four UARTs, two CANs, three 12-bit ADCs, two 12-bit DACs, two SAIs, 8- to 14-bit digital camera module interface, internal 320+16+4 KB SRAM and 1 MB Flash memory, USB HS OTG, USB FS OTG, Ethernet MAC, FMC interface, Quad-SPI interface, SWD debugging support. This discovery board offers everything required for users to get started quickly and develop applications easily.

The full range of hardware features on the board helps to evaluate almost all peripherals (USB OTG HS, USB OTG FS, Ethernet 10/100Mb, MicroSD Card, USART, SAI Audio DAC stereo with audio jack input and output, MEMS digital microphones, SDRAM, Quad-SPI Flash memory, 4.3-inch color LCD-TFT with a capacitive multi-touch panel, SPDIF RCA input, etc.) and develop your own applications. Arduino Uno V3 connectors make it possible to easily connect extension shields or a daughterboard for your specific application. The integrated ST-LINK/V2-1 provides an embedded in-circuit debugger and programmer for the STM32 MCU.

图2。开发板32F746GDISCOVERY外形图

图3。开发板32F746GDISCOVERY框图

图4。开发板32F746GDISCOVERY PCB元器件布局图(顶层)

图5。开发板32F746GDISCOVERY PCB元器件布局图(底层)

图6。开发板32F746GDISCOVERY电路图(1)

图7。开发板32F746GDISCOVERY电路图(2)

图8。开发板32F746GDISCOVERY电路图(3)

图9。开发板32F746GDISCOVERY电路图(4)

图10。开发板32F746GDISCOVERY电路图(5)

图11。开发板32F746GDISCOVERY电路图(6)

图12。开发板32F746GDISCOVERY电路图(7)

图13。开发板32F746GDISCOVERY电路图(8)

图14。开发板32F746GDISCOVERY电路图(9)

图15。开发板32F746GDISCOVERY电路图(10)

图16。开发板32F746GDISCOVERY电路图(11)

图17。开发板32F746GDISCOVERY电路图(12)

图18。开发板32F746GDISCOVERY电路图(13)

开发板32F746GDISCOVERY材料清单见:

开发板32F746GDISCOVERY材料清单.xls

DM00166116.pdf
DM00190424.pdf



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