mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 185

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

If the device is configured as a single channel device by setting MCR.SCD to ‘1’, only the internal channel
A and the FlexRay Port A is used. Depending on the setting of MCR.CHA and MCR.CHB, the internal
channel A behaves either as a FlexRay Channel A or FlexRay Channel B. The bit MCR.CHA must be set,
if the FlexRay Port A is connected to a FlexRay Channel A. The bit MCR.CHB must be set if the FlexRay
Port A is connected to a FlexRay Channel B. The two FlexRay channels differ only in the initial value for
the frame CRC cCrcInit. For a single channel device, the application can access and configure only the
registers related to internal channel A.
Freescale Semiconductor
FlexRay Module
FlexRay Module
CHI
CHI
reg(A)
reg(B)
reg(A)
reg(B)
cfg(A)
cfg(B)
cfg(A)
cfg(B)
Figure 3-131. Single Channel Device Mode (Channel A)
Figure 3-132. Single Channel Device Mode (Channel B)
PE
PE
cCrcInit[A]
cCrcInit[B]
cCrcInit[B]
channel A
channel B
channel A
channel B
cCrcInit[A]
MFR4300 Data Sheet, Rev. 3
RXD_BG1
TXD_BG1
TXEN1#
RXD_BG2
TXD_BG2
TXEN2#
RXD_BG1
TXD_BG1
TXEN1#
RXD_BG2
TXD_BG2
TXEN2#
Init Value for Frame CRC is
FlexRay Bus Driver
FlexRay Bus Driver
Channel A
Channel A
cCrcInit[B]
FlexRay Module (FLEXRAYV2)
FlexRay Channel
FlexRay Channel
A
B
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