NXP Semiconductors MPC5644A, Reference Manual, Page: 1475 / 1735

FlexRay Communication Controller (FlexRay)
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 1475
MSB_EF Message Buffer Search Error Flag — This flag is set if the message buffer search engine is still
running while the next search cycle must be started due to the FlexRay protocol timing. In this case,
not all message buffers are considered while searching.
0 No such event
1 Search engine active while search start appears
MBU_EF Message Buffer Utilization Error Flag — This flag is asserted if the application writes to a message
buffer control field that is beyond the number of utilized message buffers programmed in the
Message
Buffer Segment Size and Utilization Register (FR_MBSSUTR) .
If the application writes to a FR_MBCCSRn register with n > LAST_MB_UTIL, the CC ignores the write
attempt and asserts the message buffer utilization error flag MBU_EF in the
CHI Error Flag Register
(FR_CHIERFR) .
0 No such event
1 Non-utilized message buffer enabled
LCK_EF Lock Error Flag — This flag is set if the application tries to lock a message buffer that is already locked
by the CC due to internal operations. In that case, the CC does not grant the lock to the application.
The application must issue the lock request again.
0 No such error
1 Lock error detected
DBL_EF Double Transmit Message Buffer Lock Error Flag — This flag is set if the application tries to lock
the transmit side of a double transmit message buffer. In this case, the CC does not grant the lock to
the transmit side of a double transmit message buffer.
0 No such event
1 Double transmit buffer lock error occurred
SBCF_EF System Bus Communication Failure Error Flag — This flag is set if a system bus access was not
finished within the required amount of time (see Section 33.6.19.1.2, System bus access timeout ”).
0 No such event
1 System bus access not finished in time
FID_EF Frame ID Error Flag — This flag is set if the frame ID stored in the message buffer header area differs
from the frame ID stored in the message buffer control register.
0 No such error occurred
1 Frame ID error occurred
DPL_EF Dynamic Payload Length Error Flag — This flag is set if the payload length written into the message
buffer header field of a single or double transmit message buffer assigned to the dynamic segment is
greater than the maximum payload length for the dynamic segment as it is configured in the
corresponding protocol configuration register field max_payload_length_dynamic in the
Protocol
Configuration Register 24 (FR_PCR24) .
0 No such error occurred
1 Dynamic payload length error occurred
SPL_EF Static Payload Length Error Flag — This flag is set if the payload length written into the message
buffer header field of a single or double transmit message buffer assigned to the static segment is
different from the payload length for the static segment as it is configured in the corresponding protocol
configuration register field payload_length_static in the
Protocol Configuration Register 19
(FR_PCR19) .
0 No such error occurred
1 Static payload length error occurred
Table 33-22. FR_CHIERFR field description (continued)
Field Description