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Hardware Design Specification
ASD-B-16-0247 Rev1.3
Page 39 of 105
September 8, 2017
RTK00V2XRC7746SFS
3.14
CAN and Flexray Interface
3.14.1
Specifications
On the Tethys board, there are three CAN bus, one is connected to the R-Car W2H, and another two are connected to the MCU.
The high speed CAN driver TJA1050 manufactured by NXP is used for the two CAN bus.
On the Tethys board, there are one Flexray bus connected to the MCU. The high speed Flexray driver TJA1082 manufactured
by NXP is used for the Flexray bus.
Table 18 CAN and Flexray Interface Specifications
Controller
R-Car W2H and RH850F1H/F1L
,
if mounting RH850F1L, not Flexray function
Control Interface
CN6:
HTST-105-04-S-D-RA from Samtec
CAN Transceiver Interface
TJA1050 from NXP
Flexray Transceiver Interface
TJA1082 from NXP
3.14.2
Block Diagram
CAN transceiver
TJA1050
NXP
U19
R-car W2H
CPU
U1
CAN transceiver
TJA1050
NXP
U21
RH850F1H/F1L
MCU
U32
CAN transceiver
TJA1050
NXP
U23
CN6
10 pin 2.54 pitch
connector
HTST-105-04-S-D-RA
Flexray transceiver
TJA1082
NXP
U47
Figure 16 Block Diagram of the CAN and Flexray Interface