mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 173

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Transition Priorities
The application can trigger only one transition at a time. There is no need to specify priorities among them.
As shown in the first part of
transitions. The priorities among the FlexRay module transitions and the related states are given in the
second part of
start transition IS has tho lowest priority.
Freescale Semiconductor
common transitions
transmit side specific transitions
Transition
CCMa
State
DSS
SSS
STS
Idle
Idle
MA
SA
SU
TX
IS
IE
Table
MBCCSR[2n+1].CMT = 1
symbol window start or
symbol window start or
see
CycleCounter match
dynamic slot start or
TX > DSS
TX > STS
“Internal Message
MA > SA
Priority
IS > HD
IS > HL
status updated
slot match and
slot match and
static slot start
Table 3-106. Double Transmit Message Buffer Transition Priorities
Table 3-105. Double Transmit Message Buffer Module Transitions
3-106. These priorities apply only to the transmit side. The internal message transmit
Section 3.4.6.4.5,
slot start and
slot start or
Condition
static slot
NIT start
NIT start
Transfer
Table
Internal Message Transfer Start > Message Buffer Disable
Internal Message Transfer Start > Message Buffer Lock
Message Available > Slot Assigned
Transmission Slot Start > Static Slot Start
Transmission Slot Start > Dynamic Slot Start
3-106, the module transitions have a higher priority than the application
Internal Message Transfer Start - Start transfer of message data from commit
side to transmit side.
Internal Message Transfer End - Stop transfer of message data from commit
side to transmit side.
Note: The internal message transfer is stopped before the slot or segment start.
Slot Assigned - Message buffer is assigned to next static slot.
Message Available - Message buffer is assigned to next slot and cycle counter
filter matches.
Transmission Slot Start - Slot Start and commit bit CMT is set.
In case of a dynamic slot, pLatestTx is not exceeded.
Status Updated - Slot Status field and message buffer status flags updated.
Interrupt flag set.
Static Slot Start - Start of static slot.
Dynamic Slot or Segment Start. - Start of dynamic slot or symbol window or
NIT.
Slot or Segment Start - Start of static slot or dynamic slot or symbol window or
NIT.
MFR4300 Data Sheet, Rev. 3
module vs. application
module internal
Description
Description
FlexRay Module (FLEXRAYV2)
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