STM32F103ZET6

The maximum frequency of the ARM 32-bit Cortex-M3 CPU in the STM32F103xC, STM32F103xD, and STM32F103xE MCUs is 72 MHz.

The STM32F103xC, STM32F103xD, and STM32F103xE MCUs support various types of memories, including Flash memory ranging from 256 to 512 Kbytes, SRAM up to 64 Kbytes, and a Flexible Static Memory Controller (FSMC) with four Chip Select outputs that support Compact Flash, SRAM, PSRAM, NOR, and NAND memories. Additionally, the FSMC functionality includes features such as write FIFO, code execution from external memory (excluding NAND Flash and PC Card), and a targeted frequency of external access at 36 MHz when HCLK is at 72 MHz and 24 MHz when HCLK is at 48 MHz.

The STM32F103xC, STM32F103xD, and STM32F103xE MCUs offer a total of five communication interfaces. These include three universal synchronous/asynchronous receiver transmitters (USART1, USART2, and USART3) and two universal asynchronous receiver transmitters (UART4 and UART5) .