As I know, Virtual COM port of ST-Link connection is connected to Usart2 on a STM32F401Re. When, ST-Link part is still attached everything is working fine on Usart2.
However, after cutting ST-Link part of the PCB, I am trying to connect a USB-TTL converter to PA2/PA3 pins and it is not working.
Power is maintained by USB-TTL converter, therefore JP5 is settled to E5V. Power delivery is quite OK. However, I can not get TX-RX work. I also tried to close SB62 & SB63 bridge solders. Nothing changed.
How can I connect F401RE board using usart2 to PC without using VirtualCom supplied by ST-link? Thanks.