NXP Semiconductors PXN2020 - Page 731

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