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 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.

32-bit Arm® Cortex®-M7 core with double-precision FPU and L1 cache
Up to 2 Mbytes of Flash memory with read-while-write support
1 Mbyte of RAM
Dual mode Quad-SPI memory interface running up to 133 MHz
Up to 168 I/O ports with interrupt capability
3 separate power domains which can be independently clock-gated or switched off:
Low-power consumption
Ethernet MAC interface with DMA controller
HDMI-CEC
LCD-TFT controller up to XGA resolution
RTC with sub-second accuracy & HW calendar