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.

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
Dual mode Quad-SPI memory interface running up to 133 MHz
Flexible external memory controller with up to 32-bit data bus
General-purpose input/outputs
Up to 168 I/O ports with interrupt capability
Fast I/Os capable of up to 133 MHz
Reset and power management
Backup regulator (∼0.9 V)
Voltage reference for analog peripheral/VREF+
Low-power modes: Sleep, Stop, Standby and VBAT supporting battery charging
Low-power consumption
Total current consumption down to 4 μA