PXN20RM Datasheet, PDF (731/1376 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

FlexRay Communication Controller (FlexRAY)
RESET_STATE
HDis
HE
IE
IS
CCITx
HD
IS
IE
CCSaCCITx
SU
Idle
DSS
SA
DSS
CCSa
STS
MA
SSS
STS
CCNf
IS
IE
CCSu
SSS
CCTx
TX
CCMa
IS
IE
CCNfCCITx
CCMaCCITx
Figure 26-133. Double Transmit Message Buffer State Diagram (Transmit Side)
A description of the states of the transmit side of a double transmit message buffer is given in
Table 26-108.
Table 26-108. Double Transmit Message Buffer State Description (Transmit Side)
State
common states
HDis
MBCCSRn
EDS LCKS
0
0
CCITx
1
0
transmit side specific states
Idle
1
0
CCSa
1
0
CCSaCCITx
1
0
CCNf
1
0
CCNfCCITx
1
0
CCMa
1
0
CCMaCCITx
1
0
Access Region
Appl. Module
Description
CFG
–
–
–
–
–
–
–
–
– Disabled - Message Buffer under configuration.
Excluded from message buffer search.
TX Internal Message Transfer - Message Buffer Data transferred from
commit side to transmit side.
SR Idle - Message Buffer Transmit Side is idle.
Transmit Side is included in message buffer search.
– Slot Assigned - Message buffer assigned to next static slot.
Ready for Null Frame transmission.
TX Slot Assigned and Internal Message Transfer - Message buffer
assigned to next static slot and Message Buffer Data transferred
from commit side to transmit side.
TX Null Frame Transmission
Header is used for null frame transmission.
TX Null Frame Transmission and Internal Message Transfer - Header is
used for null frame transmission and Message Buffer Data
transferred from commit side to transmit side.
– Message Available - Message buffer is assigned to next slot and
cycle counter filter matches.
– Message Available and Internal Message Transfer - Message buffer
is assigned to next slot and cycle counter filter matches and
Message Buffer Data transferred from commit side to transmit side.
Freescale Semiconductor
PXN20 Microcontroller Reference Manual, Rev. 1
26-117