STM32H735xG devices are based on the high-performance Arm®Cortex®-M7 32-bit RISC core operating at up to 550 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. The Cortex -M7 core includes 32 Kbytes of instruction cache and 32 Kbytes of data cache. STM32H735xG devices support a full set of DSP instructions and a memory protection unit (MPU) to enhance application security.

STM32H735xG devices incorporate high-speed embedded memories with 1 Mbyte of flash memory, up to 564 Kbytes of RAM (including 192 Kbytes that can be shared between ITCM and AXI, plus 64 Kbytes exclusively ITCM, plus 128 Kbytes exclusively AXI, 128 Kbyte DTCM, 48 Kbytes AHB and 4 Kbytes of backup RAM), 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 multilayer AXI interconnect supporting internal and external memory access. To improve application robustness, all memories feature error code correction (one error correction, two error detections).

The devices embed peripherals allowing mathematical/arithmetic function acceleration (CORDIC coprocessor for trigonometric functions and FMAC unit for filter functions). All the devices offer three ADCs, two DACs, two operational amplifiers, two ultra-low-power comparators, a low-power RTC, four general-purpose 32-bit timers, 12 general-purpose 16-bit timers including two PWM timers for motor control, five low-power timers, a true random number generator (RNG), and a cryptographic acceleration cell, and a HASH processor. The devices support four digital filters for external sigma-delta modulators (DFSDM). They also feature standard and advanced communication interfaces.