"The stm32h743i of ST company is a 32-bit arm cortex with high performance operating frequency of 400MHz ®- M7mcu with floating point unit (FPU) and arm support ® Double precision (IEEE 754 compatible) and single precision data processing instructions and data types, integrating up to 2MB flash memory, 1MB ram, art accelerator, L1 cache, peripheral memory interface and various peripherals, 856 DMIPS / 2.14 DMIPS / MHz (dhrytone 2.1). It is mainly used in motor drive and application control, medical electronics, industrial applications such as PLC, inverter and circuit breaker, printer and scanner, alarm system, video interconnection and HVAC, home audio, mobile applications and Internet of things, and wearable such as smart watch. This paper introduces the main characteristics and block diagram of stm32h743xi, as well as the main characteristics, block diagram, main component distribution diagram, circuit diagram and material list of evaluation board stm32h743i-eval.
STM32H743xI devices are based on the high-performance Arm ® Cortex ®- M7 32-bit RISC core operating at up to 400 MHz. The Cortex ® - M7 core features a floating point unit （FPU） which supports Arm ® double-precision （IEEE 754 compliant） and single-precision data-processing instructions and data types. STM32H743xI devices support a full set of DSP instructions and a memory protection unit （MPU） to enhance application security.
STM32H743xI devices are based on the high-performance Arm ® Cortex ®- M7 32-bit RISC core operating at up to 400 MHz. The Cortex ® - M7 core features a floating point unit （FPU） which supports Arm ® double-precision （IEEE 754 compliant） and single-precision data-processing instructions and data types. STM32H743xI devices support a full set of DSP instructions and a memory protection unit （MPU） to enhance application security.
STM32H743xI devices incorporate high-speed embedded memories with a dual-bank Flash memory up to 2 Mbytes， 1 Mbyte of RAM （including 192 Kbytes of TCM RAM， 864 Kbytes of user SRAM and 4 Kbytes of backup SRAM）， as well as an extensive range of enhanced I/Os and peripherals connected to APB buses， AHB buses， 2x32-bit multi-AHB bus matrix and a multi layer AXI interconnect supporting internal and external memory access.
All the devices offer three ADCs， two DACs， two ultra-low power comparators， a low-power RTC， a high-resolution timer， 12 general-purpose 16-bit timers， two PWM timers for motor control， five low-power timers and a true random number generator （RNG）。 The devices support four digital filters for external sigma-delta modulators （DFSDM）。 They also feature standard and advanced communication interfaces.
• Standard peripherals
– Four I2Cs
– Four USARTs， four UARTs and one LPUART
– Six SPIs， three I2Ss in half-duplex mode. To achieve audio class accuracy， the I2S peripherals can be clocked by a dedicated internal audio PLL or by an external clock to allow synchronization.
– Four SAI serial audio interfaces
– One SPDIFRX interface
– One SWPMI （Single Wire Protocol Master Interface）
– Management Data Input/Output （MDIO） slaves
– Two SDMMC interfaces
– A USB OTG full-speed and a USB OTG high-speed interface with full-speed capability （with the ULPI） – One FDCAN plus one TT-CAN interface
– An Ethernet interface
– Chrom-ART Accelerator ™
– HDMI-CEC
• Advanced peripherals including
– A flexible memory control （FMC） interface
– A Quad-SPI Flash memory interface
– A camera interface for CMOS sensors
– An LCD-TFT display controller
– A JPEG hardware compressor/decompressor
STM32H743xI devices operate in the –40 to +85 ℃ temperature range from a 1.62 to 3.6 V power supply. The supply voltage can drop down to 1.62 V by using an external power supervisor and connecting the PDR_ ON pin to VSS. Otherwise the supply voltage must stay above 1.71 V with the embedded power voltage detector enabled.
Dedicated supply inputs for USB （OTG_ FS and OTG_ HS） are available on all packages except LQFP100 to allow a greater power supply choice.
A comprehensive set of power-saving modes allows the design of low-power applications.
STM32H743xI devices are offered in 8 packages ranging from 100 pins to 240 pins/balls. The set of included peripherals changes with the device chosen.
These features make STM32H743xI 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 applications， Internet of Things
• Wearable devices： smart watches.
Main characteristics of stm32h743xi:
Core
32-bit Arm ® Cortex ®- M7 core with double-precision FPU and L1 cache： 16 Kbytes of data and 16 Kbytes of instruction cache allowing one cache line to be filled in a single access from the 256-bit embedded Flash memory; frequency up to 400 MHz， MPU， 856 DMIPS/ 2.14 DMIPS/MHz （Dhrystone 2.1）， and DSP instructions
Memories
Up to 2 Mbytes of Flash memory with read-while-write support
1 Mbyte of RAM： 192 Kbytes of TCM RAM （inc. 64 Kbytes of ITCM RAM + 128 Kbytes of DTCM RAM for time critical routines）， 864 Kbytes of user SRAM， and 4 Kbytes of SRAM in Backup domain
Dual mode Quad-SPI memory interface running up to 133 MHz
Flexible external memory controller with up to 32-bit data bus： SRAM， PSRAM， SDRAM/LPSDR SDRAM， NOR/NAND Flash clocked up to 133 MHz in synchronous mode
CRC calculation unit
Security
ROP， PC-ROP， active tamper
General-purpose input/outputs
Up to 168 I/O ports with interrupt capability
Fast I
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