User's Manual

Target Board for RX23W 5. User Circuit
R01UHxxxEG0100
Rev.0.60 Page 15 of 28
Nov. 26, 2019
USB Serial Port
The USB connector CN5 is connected to the FTDI USB serial conversion module and can be used as a virtual
COM port. The USB serial connection relationship is shown below.
Table 5-2 : Serial Port Connections
Signal Name
Function
MCU
Port
Pin
TXD
Transmit Signal.
PC7
23
RXD
Receive Signal.
PC6
24
CTS
Clear To Send.
*1
RTS
Request To Send.
*1
*1: 製品出荷時は接続されていません。
When the CPU board is first connected to a PC running Windows™ with the USB/Serial connection, the PC
will look for a driver. This driver is installed during the installation process, so the PC should be able to find it.
The PC will report that it is installing for a driver and then report that a driver has been installed successfully,
as shown in Figure 5-2. The exact messages may vary depending upon operating system.。
Figure 5-3
： USB-Serial Windows™ Installation message
If you do not have the driver, please download the driver installer from the following FTDI HP.