mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 182

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

FlexRay Module (FLEXRAYV2)
A received frame passes the FIFO filtering if it has passed all three type of filter.
3.4.9.5.1
The frame ID value-mask rejection filter is a value-mask filter and is defined by the fields in the
FIFO Frame ID Rejection Filter Value Register (RFFIDRFVR)
Filter Mask Register
value-mask filter value passes the filter, i.e. is not rejected.
Consequently, a received valid frame with the frame ID FID passes the RX FIFO Frame ID Value-Mask
Rejection Filter if
182
FID & RFFIDRFMR.FIDRFMSK != RFFIDRFVR.FIDRFVAL & RFFIDRFMR.FIDRFMSK
RX FIFO Frame ID Value-Mask Rejection Filter
store into message buffer (vRF)
Equation 3-10
append to FIFO (vRF)
(RFFIDRFMR). Each received frame with a frame ID FID that does not match the
Figure 3-129. Received Frame FIFO Filter Path
is fulfilled.
MFR4300 Data Sheet, Rev. 3
yes
no
no
no
message ID (vRF!Header!PPIndicator=’1’)
null frame (vRF!Header!NFIndicator=’0’)
Frame ID Value-Mask rejection filter
frame received in dynamic segment
Frame ID Range acceptance filter
individual message buffer found
Frame ID Range rejection filter
Message ID acceptance filter
set fifo overflow interrupt flag
valid frame received (vRF)
and the
ignore frame
FIFO full
no
no
passed
passed
passed
yes
yes
passed
yes
Receive FIFO Frame ID Rejection
Freescale Semiconductor
else
else
else
else
yes
Eqn. 3-10
Receive