280 MHz Cortex-M7 with 1.4 MB RAM — the RAM-heavy MCU for compute-intensive control
The STM32H7B0VBT6: The 1.4 MB on-chip SRAM and 128 KB Flash ratio supports designs that execute code from RAM or external memory, or buffer large data sets locally.
128 KB Flash, 1.4 MB RAM — what the memory split means for your firmware architecture
The 128 KB Flash is small for a 280 MHz Cortex-M7, but the 1.4 MB SRAM is generous. This combination targets designs that boot from internal Flash then relocate critical code or data to RAM for zero-wait-state execution. The large RAM also supports high-resolution graphics buffers, audio processing, or protocol stacks without external memory. If your application needs more than 128 KB of non-volatile storage, plan for external Flash or QSPI memory on the EBI/Quad-SPI interface.
The base product number STM32H7B0 covers a density and package family, so future migration within the same die is possible without a full qualification cycle.
80 I/Os and 100-LQFP — layout considerations
The 100-LQFP (14x14 mm) package with 80 I/Os gives good routing density for a mixed-signal design. Supply range is 1.62 V to 3.6 V.