Renesas Starter Kit+, User Manual

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Renesas Starter Kit+ for RX72N 5. User Circuitry
R20UT4443EG0100 Rev. 1.00 Page 21 of 57
Nov 30, 19
5.7 USB Serial Port
A USB serial port is implemented in a Renesas low power microcontroller (RL78/G1C) and is connected to the
RX72N Serial Communications Interface (SCI) module. Multiple options are provided to allow the selection of
the connected SCI9 port. Connections between the USB to Serial converter and the microcontroller are listed
in
Table 5-7
below.
Table 5-7: Serial Port Connections
Signal Name Function
MCU
Port Pin
SERIAL-TXD
SCI1 Transmit Signal. *1 PF0 K5
SCI9 Transmit Signal. PL2 P12
External RS232 Transmit Signal. *1 - -
SERIAL-RXD
SCI1 Receive Signal. *1 PF2 J2
SCI9 Receive Signal. PL1 J10
External RS232 Receive Signal.
*1
- -
SERIAL-CTS *2 Clear To Send. P03 D3
SERIAL-RTS *2 Request To Send. P43 E4
*1
: This connection is a not available in the default RSK+ configuration - refer to §6 for the required
modifications.
*2
: Flow control is a signal provided for expansion and is not currently supported. There is no schedule of
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.
Figure 5
-
2: USB-Serial Windows™ Installation message
If you do not have the driver, please download the driver installer from the following URL.
https://www.renesas.com/en-eu/software/D6000699.html
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 RX72N Group
User’s Manual: Hardware. The connections for the CAN microcontroller signals are listed in Table 5-8 below.
Table 5-8: CAN Connections
CAN Signal Function
MCU
Port Pin
CAN1TX
CAN Data Transmission. P32 H5
JA5-CAN1TX *1
CAN1RX
CAN Data Reception.
P33 H4
JA5-CAN1RX
*1
*1
: This connection is a not available in the default RSK+ configuration - refer to §6 for the required
modifications.