FlexRay Communication Controller (FLEXRAY)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
30-127
Preliminary
A received valid frame in the dynamic segment with the payload preamble indicator bit PPI set to 1 and
with the message ID MID (the first two bytes of the payload) will pass the RX FIFO Message ID
Acceptance Filter if
is fulfilled.
Eqn. 30-15
The RX FIFO Message ID Acceptance Filter can be configured to accept all frames by setting
•
RFMIDAFMR.MIDAFMSK:= 0x000
is always fulfilled and all frames will pass.
30.6.10 Channel Device Modes
This section describes the two FlexRay channel device modes that are supported by the FlexRay block.
30.6.10.1 Dual Channel Device Mode
In the dual channel device mode, both FlexRay ports are connected to physical FlexRay bus lines. The
FlexRay port consisting of FR_A_RX, FR_A_TX, and FR_A_TX_EN is connected to the physical bus
channel A and the FlexRay port consisting of FR_B_RX, FR_B_TX, and FR_A_TX_EN is connected to
the physical bus channel B. The dual channel system is shown in
Figure 30-132. Dual Channel Device Mode
30.6.10.2 Single Channel Device Mode
The single channel device mode supports devices that have only one FlexRay port available. This FlexRay
port consists of the signals FR_A_RX, FR_A_TX, and FR_A_TX_EN and can be connected to either the
physical bus channel A (shown in
) or the physical bus channel B (shown in
MID
RFMIDAFMR MIDAFMSK
[
]
∧
RFMIDAFMR MIDAFVAL
[
]
RFMIDAFMR MIDAFMSK
[
]
∧
=
CHI
PE
cfg(A)
reg(A)
cCrcInit[A]
cCrcInit[B]
cfg(B)
reg(B)
channel 0
channel 1
FlexRay Channel
A
FlexRay Bus Driver
Channel A
FR_A_RX
FR_A_TX
FR_A_TX_
FlexRay Channel
B
FlexRay Bus Driver
Channel B
FR_B_RX
FR_B_TX
FR_B_TX_
FLEXRAY