FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 26-101
Figure 26-120. Single Transmit Message Buffer States
Table 26-96. Single Transmit Message Buffer State Description
State
MBCCSRn Access Region
Description
EDS LCKS Appl. Module
Idle 1 0 – CM,
SR
Idle
- Message Buffer is idle.
Included in message buffer search.
HDis 0 0 CFG – Disabled - Message Buffer under configuration.
Excluded from message buffer search.
HDisLck 0 1 CFG – Disabled and Locked - Message Buffer under configuration.
Excluded from message buffer search.
HLck 1 1 MSG SR L
ocked - Applications access to data, control, and status.
Included in message buffer search.
CCSa 10––S
lot Assigned - Message buffer assigned to next static slot.
Ready for Null Frame transmission.
HLckCCSa 1 1 MSG – Locked and Slot Assigned - Applications access to data, control, and
status.Message buffer assigned to next static slot
CCNf 1 0 – NF N
ull Frame Transmission
Header is used for null frame transmission.
HLckCCNf 1 1 MSG NF Locked and Null Frame Transmission - Applications access to data,
control, and status. Header is used for null frame transmission.
CCMa 1 0 – CM Message Available - Message buffer is assigned to next slot and
cycle counter filter matches.
HLckCCMa 1 1 MSG – L
ocked and Message Available - Applications access to data,
control, and status. Message buffer is assigned to next slot and cycle
counter filter matches.
CCTx 10–TXMessage T
ransmission - Message buffer data transmit. Payload data
from buffer transmitted
HDis
RESET_STATE
HD
HE
Idle
SA
DSS
SU
CCSu
CCSa CCTx
TX
HLck
HLckCCSa CCNf
HL
HU
CCMa
HL
HU
HLckCCNf
HLckCCMa
SSS
STS
HE
HL
STS
HU
HL
DSS
MA
SSS
HDisLck
HD
HU
HL
HU
STS
MA
SSS
SA
DSS
STS
DSS
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