PXR40RM Datasheet, PDF (691/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

FlexRay Communication Controller (FLEXRAY)
RESET_STATE
HDis
HL
HU
HE
HU
HDisLck
HD
Idle
HL BS
SNS
SLS
CCBs
SU
CCSu
SSS
CCRx
HE
HD
HLck
HL
HU
HL
HU
SNS
SLS
HLckCCBs
HLckCCRx
BS
SSS
Figure 22-128. Receive Message Buffer States
State
Idle
HDis
HDisLck
HLck
CCBs
HLckCCBs
CCRx
HLckCCRx
CCSu
Table 22-101. Receive Message Buffer States and Access
MBCCSRn
EDS
1
LCKS
0
0
0
0
1
1
1
1
0
1
1
1
0
1
1
1
0
Access from
Appl. Module
Description
–
CFG
CFG
MSG
–
MSG
–
MSG
–
SR Idle - Message Buffer is idle.
Included in message buffer search.
– Disabled - Message Buffer under configuration.
Excluded from message buffer search.
– Disabled and Locked - Message Buffer under configuration.
Excluded from message buffer search.
– Locked - Applications access to data, control, and status.
Included in message buffer search.
– Buffer Subscribed - Message buffer subscribed for reception. Filter
matches next (slot, cycle, channel) tuple.
– Locked and Buffer Subscribed - Applications access to data,
control, and status. Message buffer subscribed for reception.
– Message Receive - Message data received into related shadow
buffer.
– Locked and Message Receive - Applications access to data,
control, and status. Message data received into related shadow
buffer.
RX Status Update - Message buffer status update. Update of status
flags, the slot status field, and the header index.
22.6.6.3.1 Message Buffer Transitions
Application Transitions
The application transitions that can be triggered by the application using the commands described in
Table 22-102. The application issues the commands by writing to the Message Buffer Configuration,
Control, Status Registers (MBCCSRn). Only one command can be issued with one write access. Each
command is executed immediately. If the command is ignored, it must be issued again.
Message Buffer Enable and Disable
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
22-107