The STM32H7A3IIT6Q device is based on the high-performance Arm® Cortex®-M7 32-bit RISC core running at up to 280 MHz. The Cortex® -M7 core features an Arm® double precision floating point unit (FPU) (IEEE 754 compliant) and single precision data processing instructions and data types. STM32H7A3xI/G devices support a full set of DSP instructions and a Memory Protection Unit (MPU) to enhance application security.

STM32H7A3IIT6Q devices contain high-speed embedded memory, dual-bank Flash up to 2 MB, about 1.4 MB of RAM (including 192 KB of TCM RAM, 1.18 MB of user SRAM and 4 KB of backup SRAM), as well as extensive enhanced I/O and Peripherals are connected to four APB buses, three AHB buses, a 32-bit multi-AHB bus matrix, and a multilayer AXI interconnect that supports internal and external memory access.

All STM32H7A3IIT6Q devices offer two ADCs, two DACs (one dual DAC and one single DAC), two ultra-low-power comparators, a low-power RTC, 12 general-purpose 16-bit timers, two controlled PWM timers, three low-power timers, and a true random number generator (RNG). The devices support nine digital filters (DFSDM) for the external sigma delta modulator. They also have standard and advanced communication interfaces.