① The CP2102 and Tx, Rx LEDs are designed to operate by receiving 3.3V from the MCU.
② The CP2102 determines it is connected to the PC when 5V from the USB is applied to the VBUS pin (pin 8).
[2] Verification Procedure
# TeraTerm Setting
The baud rate of the MCU's UART and Tera Term must be the same.
# Paste commands into Tera Term
In Tera Term, the default method for pasting commands is by right-clicking the mouse.
# CP2102 Driver
To use the CP2102, you need to download and install the driver from the SiLab (Silicon Labs) website.
Once the CP2102 driver is installed, the CP2102 chip will be recognized in the PC’s Device Manager as follows.
# Verification Result
I confirmed that UART communication via USB is functioning correctly by sending a message from the PC to the custom STM32F4 board and then having the custom board send the message back to the PC.
