FlexRay Communication Controller (FLEXRAY)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
30-145
Preliminary
NOTE
The bit rate of 8 Mbit/s is not defined by the
System Protocol Specification, Version 2.1 Rev A.
30.7
Application Information
30.7.1
Initialization Sequence
This section describes the required steps to initialize the FlexRay block. The first subsection describes the
steps required after a system reset, the second section describes the steps required after preceding
shutdown of the FlexRay block.
30.7.1.1
Module Initialization
This section describes the module related initialization steps after a system reset.
1. Configure FlexRay block.
a) configure the control bits in the
Module Configuration Register (MCR)
b) configure the system memory base address in
System Memory Base Address High Register
(SYMBADHR) and System Memory Base Address Low Register (SYMBADLR)
2. Enable the FlexRay block.
a) write 1 to the module enable bit MEN in the
Module Configuration Register (MCR)
The FlexRay block now enters the Normal Mode. The application can commence with the protocol
initialization described in
Section 30.7.1.2, “Protocol Initialization
Table 30-113. FlexRay Channel Bit Rate Control
FlexRay Channel
Bit Rate
[Mbit/s]
MCR.BITRATE
pd
Micr
oti
c
k
[ns]
gd
Samp
leClo
c
kP
erio
d
[ns]
pSampl
esP
e
rMi
c
ro
ti
c
k
cSa
m
pl
es
P
e
rB
it
cStr
obeOffset
10.0
000
25.0
12.5
2
8
5
8.0
011
25.0
12.5
2
10
6
5.0
001
25.0
25.0
1
8
5
2.5
010
50.0
50.0
1
8
5