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Section 20 Controller Area Network
R01UH0134EJ0400 Rev. 4.00 Page 1079 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
20.7 CAN Bus Interface
A bus transceiver IC is necessary to connect this LSI to a CAN bus. A Renesas HA13721
transceiver IC and its compatible products are recommended. As the CRx and CTx pins use 3 V,
an external level shifter is necessary. Figure 20.27 shows a sample connection diagram.
CTx
Note: NC: No Connection
CRx
CAN bus
120
Ω
120
Ω
5V
HA13721
MODE
Level shifter
Rxd
Txd
NC
CANH
Vcc
CANL
GND
This LSI
Figure 20.27 High-Speed CAN Interface Using HA13721