PXS20RM Datasheet, PDF (779/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexRay Communication Controller
Field
RDIDX
Table 26-68. FR_RFBRIR Field Descriptions
Description
Read Index — This field provides the message buffer header index of the next available FIFO
message buffer that the application can read.
NOTE
If the FIFO is empty, the RDIDX field points to an physical message buffer
with invalid content.
26.5.2.60 Receive FIFO Fill Level and POP Count Register (FR_RFFLPCR)
Base + 0x00EE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
FLB
FLA
W
PCB
PCA
Rese
t
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 26-61. Receive FIFO Fill Level and POP Count Register (FR_RFFLPCR)
This register provides the current fill level of the two receiver FIFOs and is used to pop a number of entries
from the FIFOs.
Table 26-69. FR_RFFLPCR Field Descriptions
Field
FLB
FLA
PCB
PCA
Description
Fill Level FIFO B — This field provides the current number of entries in the FIFO B.
Fill Level FIFO A— This field provides the current number of entries in the FIFO A.
Pop Count FIFO B — This field defines the number of entries to be removed from FIFO B.
Pop Count FIFO A— This field defines the number of entries to be removed from FIFO A.
NOTE
If the pop count value PCA/PCB is greater than the current FIFO fill level
FLB/FLA, than the FIFO is empty after the update. No notification is given
that not the required number of entries was removed.
Freescale Semiconductor
PXS20 Microcontroller Reference Manual, Rev. 1
26-67