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TC1784
FlexRay™ Protocol Controller (E-Ray)
User´s Manual
20-253
V1.1, 2011-05
E-Ray, V3.13
8. ECC error in data transfer from Transient Buffer RAM A, B
⇒
Message RAM
(ECC error when reading Transient Buffer RAM A, B)
a)
.
bit is set
b)
bit is set to indicate that
.
points to a faulty Message
Buffer
c)
indicates the number of the faulty Message Buffer
9. ECC error during data transfer from Message RAM
⇒
Output Buffer RAM
a)
bit is set
b)
bit is set to indicate that
.
points to a faulty Message
Buffer
c)
indicates the number of the faulty Message Buffer
10. ECC error during Host reading Output Buffer RAM
a) •
11. ECC error during data read of Transient Buffer RAM A, B
If an ECC error occurs while the Message Handler reads a Frame with Network
Management information (PPI = 1) from the Transient Buffer RAM A, B the
corresponding Network Management vector registers NMV1 to NMV3 are not updated
from that Frame.
20.6.13
Host Handling of Errors
An ECC error caused by transient bit flips can be fixed by:
20.6.13.1 Self-Healing
ECC errors located in
•
Input Buffer RAM 1,2
•
Output Buffer RAM 1,2
•
Data Section of Message RAM
•
Transient Buffer RAM A
•
Transient Buffer RAM B
are overwritten with the next write access to the disturbed bit(s) caused by Host access
or by FlexRay communication.
20.6.13.2 CLEAR_RAMS Command
When called in DEFAULT_CONFIG or CONFIG state POC command CLEAR_RAMS
initializes all module-internal RAMs to zero.
20.6.13.3 Temporary Unlocking of Header Section
An ECC error in the header section of a locked message buffer can be fixed by a transfer
from the Input Buffer to the locked buffer Header Section. For this transfer, the write-
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