NXP Semiconductors MPC5644A, Reference Manual, Page: 1506 / 1735

FlexRay Communication Controller (FlexRay)
MPC5644A Microcontroller Reference Manual, Rev. 6
1506 Freescale Semiconductor
33.5.2.56 Receive FIFO Start Index Register (FR_RFSIR)
This register defines the message buffer header index of the first message buffer of the selected FIFO.
33.5.2.57 Receive FIFO Depth and Size Register (RFDSR)
This register defines the structure of the selected FIFO, that is, the number of entries and the size of each
entry.
Table 33-64. FR_RFWMSR field description
Field Description
WM
A
WM
B
Watermark — This field defines the watermark value for the selected FIFO. This value is used to
control the generation of the almost full interrupt flags.
SEL Select — This control bit selects the receiver FIFO for subsequent programming.
0 Receiver FIFO for channel A selected
1 Receiver FIFO for channel B selected
Base + 0x0088 Write: POC:config
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 0 0 0 0 0
SIDX
A
/SIDX
B
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 33-57. Receive FIFO Start Index Register (FR_RFSIR)
Table 33-65. FR_RFSIR field description
Field Description
SIDX
A
SIDX
B
Start Index — This field defines the number of the message buffer header field of the first message
buffer of the selected FIFO. The CC uses the value of the SIDX field to determine the physical location
of the receiver FIFO’s first message buffer header field.
Base + 0x008A Write: POC:config
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
FIFO_DEPTH
A
/FIFO_DEPTH
B
0
ENTRY_SIZE
A
/ENTRY_SIZE
B
W
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 33-58. Receive FIFO Depth and Size Register (RFDSR)
Table 33-66. RFDSR field description
Field Description
FIFO_DEPTH
A
FIFO_DEPTH
B
FIFO Depth — This field defines the depth of the selected FIFO, that is, the number of entries.
Note : If the FIFO_DEPTH is configured to 0, FR_RFFIDRFMR[FIDRFMSK] must be configured
to 0 too, to ensure that no frames are received into the FIFO.
ENTRY_SIZE
A
ENTRY_SIZE
B
Entry Size — This field defines the size of the frame data sections for the selected FIFO in 2 byte
entities.