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Chapter 3
3.3 FlexRay
Note
Note
3.3.1
Table 3-8
3.3.2
Table 3-9
R20UT0883ED0100 Rev. 1.00
User Manual
FlexRay transmission does not need any jumper settings. All signals are hard-
wired. Power is permanently supplied to the FR drivers by VCC5 and VCC3.3/5V
and VCC15.
Bus Driver control signals (i.e. EN, STBN etc.) are also directly connected to the
V850E2/Px4 port pins. For further information, please take a look into the
schematics.
The two FlexRay channel names FRA and FRB are written as FR0 and FR1 in
the schematics.
Bus termination
According to the FlexRay Electrical Physical Layer Specification document the
bus must be terminated or not depending on the bus topology.
The board gives you the possibility to terminate the bus or not. So it can be used
with several bus topologies.
To terminate the bus set the depending jumper according to Table 3-8. To leave
the bus open no jumper setting must be done.
FlexRay bus termination
Signal
CHA_BP
FRA
CHA_BM
CHB_BP
FRB
CHB_BM
FlexRay connections
The signal layout of the female FlexRay D-Sub connectors can be seen in Table
3-9.
FlexRay D-Sub connectors
Female D-SUB,
9pin
1
6
2
7
4
8
3
9
5
Connector
Pin #
J4
1 – 2
J5
1 – 2
J10
1 – 2
J11
1 – 2
Function
n/c
n/c
CH0_A or CH1_A
CH0_B or CH1_B
n/c
n/c
n/c
n/c
n/c
Communication
16
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