ARM Cortex-M4 at 100 MHz with 1 MB Flash
The STM32F412CGU6: ARM Cortex-M4 at 100 MHz with 1 MB Flash and 256 KB RAM. Connectivity includes CANbus, USB OTG, QSPI, multiple SPI/I²C, and an SDIO interface, plus a 10-channel 12-bit ADC.
The 1 MB Flash is enough to hold a full Bluetooth or CANopen stack plus application code; the 256 KB RAM handles multiple packet buffers and a modest RTOS heap. The 36 GPIOs in the 48-pin package are tight — plan the pin allocation against the peripheral mux before layout.
Package and thermal pad
The pad also serves as the ground return for the core and I/O rings.
