STM32F446ZCH6 STMicroelectronics ARM Microcontrollers - MCU High-performance foundation line, ARM Cortex-M4 core with DSP and FPU, 256 Kbytes Flash, 180 MHz CPU, ART Accelerator, Dual QSPI
STM32F446ZEJ6 STMicroelectronics ARM Microcontrollers - MCU High-performance and DSP with FPU, ARM Cortex-M4 MCU with 512 Kbytes Flash, 180 MHz CPU, Art Accelerator, SDRAM