Memory sizing for the firmware budget
The 256 KB RAM (organised as 256K x 8) supports double-buffered frame buffers for a small TFT display or a moderate data-logging buffer without external SRAM. If the application needs more than that, the 144-pin EBI/EMI interface on this part can connect to external NOR/NAND Flash or SRAM.
The STM32F733ZET6 includes a CANbus interface, multiple I²C and SPI buses, a QSPI for high-speed serial Flash, SAI for audio, and full-speed USB. The 112 I/O count in a 144-LQFP means most of these peripherals can be brought out simultaneously — useful for a control board that talks to sensors over I²C, drives a display over parallel or QSPI, and communicates on a CAN bus. The integrated 12-bit ADC (16 channels) and 12-bit DAC (2 channels) cover analog feedback and signal generation without an external converter.
It is ROHS3 compliant.