Usb Serial Port; Controller Area Network (Can) - Renesas RX100 Series User Manual

Renesas Starter Kit for RX140

5.7 USB Serial Port

A USB serial port is implemented in a Renesas low power microcontroller (RL78/G1C) and is connected to the
RX140 Serial Communications Interface (SCI) module. Multiple options are provided to allow the selection of
the connected SCI12 port. Connections between the USB to Serial converter and the microcontroller are listed
in Table 5-6 below.
Signal Name
SERIAL-TXD
SERIAL-RXD
SERIAL-CTS *2
SERIAL-RTS
*2
: This connection is a not available in the default RSK configuration - refer to section 6 for the required
*1
modifications.
: Flow control is a signal provided for expansion and is not currently supported. There is no schedule of
*2
function expansion at present.
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 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.
If you do not have the driver, please download the driver installer from the following URL.
https://www.renesas.com/document/rsk-usb-serial-driver?language=en

5.8 Controller Area Network (CAN)

A CAN transceiver IC is fitted to the RSK board, and connected to the CAN MCU peripheral. For further
details regarding the CAN protocol and supported modes of operation, please refer to the RX140 Group
User's Manual: Hardware. The connections for the CAN microcontroller signals are listed in Table 5-7 below.
CAN Signal
CAN-TX
JA5-CAN1TX *1
CAN-RX
JA5-CAN1RX
*1
: This connection is a not available in the default RSK configuration - refer to section 6 for the required
*1
modifications.
R20UT5026EG0100 Rev.1.00
Jan 17, 2022
Table 5-6: Serial Port Connections
SCI1 Transmit Signal.
SCI12 Transmit Signal.
External RS232 Transmit Signal.
SCI1 Receive Signal.
SCI12 Receive Signal.
External RS232 Receive Signal.
Clear To Send. *1
Request To Send.
Figure 5-2: USB-Serial Windows™ Installation message
Table 5-7: CAN Connections
CAN Data Transmission.
CAN Data Reception.
Function
*1
*1
*1
*1
Function
5. User Circuitry
MCU
Port Pin
P26 20
PE1 62
- -
P30 18
PE2 61
- -
P34 15
PE3 60
MCU
Port Pin
P14 26
P15 25
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