216 MHz Cortex-M7 with 256 KB Flash — what it buys you
The STM32F723ZCI6: 256 KB Flash and 256K x 8 SRAM, 112 I/O lines in the 144-UFBGA package. The 216 MHz core with single-cycle multiply-accumulate and double-precision FPU handles FFTs and filter math without an external DSP.
This MCU includes CANbus, USB, QSPI, SAI, and multiple UART/SPI/I²C interfaces. The QSPI interface lets you attach external serial Flash or PSRAM for code shadowing or data logging without chewing up parallel bus pins. The SAI peripheral supports I²S audio codecs, useful for voice-command or sound-processing nodes. The brown-out detect and POR blocks simplify power sequencing — you can skip an external supervisor in many designs.
That shrinks board area but demands controlled impedance and X-ray inspection after reflow.
