It is from UM1472 User manual ,,, file:///C:/Users/Yeni/Desktop/stm32F407/dm00039084-discovery-kit-with-stm32f407vg-mcu-stmicroelectronics.pdf ,,, I am trying to use UART with Tera Term,As can see , The ST-LINK/V2-A supports a virtual COM port (VCP) ...