Renesas RX71M, Руководство пользователя, Страница: 20 / 72

RSK+RX71M 5. User Circuitry
R20UT3217EG0100 Rev. 1.00 Page 20 of 71
Jan 23, 2015
5.7 USB Serial Port
A USB serial port implemented in another Renesas low power microcontroller (RL78/G1C) is fitted on the
RX71M Serial Communications Interface (SCI) module. Multiple options are provided to allow the selection of
the connected SCI7 port. Connections between the USB to Serial converter and the microcontroller are listed
in
Table 5-6 below.
Signal Name Function
MCU
Port Pin
TXD1*
1
SCI1 Transmit Signal. PF0 35
RXD1*
1
SCI1 Receive Signal PF2 31
TXD2*
1
SCI2 Transmit Signal. P50 72
RXD2*
1
SCI2 Receive Signal P52 70
A-TXD7 SCI7 Transmit Signal. P90 163
A-RXD7 SCI7 Receive Signal P92 160
RS232TX*
1
External SCI Transmit Signal. - -
RS232RX*
1
External SCI Receive Signal. - -
RXCTS*
2
Clear To Send P41 171
RXRTS*
2
Request to Send PJ5 11
Table 5-6: Serial Port Connections
*
1
. This connection is a not available in the default RSK+ configuration - refer to §6 for the required
modifications.
*
2
. CTS & RTS control is not supported on this RSK+.
When the RSK+ 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 5-2: USB-Serial Windows Installation message
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 RX71M Group
User’s Manual: Hardware.
The connections for the CAN microcontroller signals are listed in
Table 5-7 below.
CAN Signal Function
MCU
Port Pin
CTX0 CAN Data Transmission. P32 29
CRX0 CAN Data Reception. P33 28
Table 5-7: CAN Connections