FlexRay Module Registers
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SPNU563A–March 2018
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FlexRay Module
Table 26-163. Message Buffer Status Register (MBS) Field Descriptions (continued)
Bit Field Value Description
15 MTB Frame transmitted on channel B. Indicates that this node has transmitted a data frame in the
configured slot on channel B.
0 No data frame is transmitted on channel B.
1 Data frame is transmitted on channel B.
14 MTA Frame transmitted on channel A. Indicates that this node has transmitted a data frame in the
configured slot on channel A.
0 No data frame is transmitted on channel A.
1 Data frame is transmitted on channel A.
13 Reserved 0 Reads return 0. Writes have no effect.
12 MLST Message lost. The flag is set in case the Host did not read the message before the message buffer
was updated from a received data frame. Not affected by reception of null frames except for
message buffers belonging to the receive FIFO. The flag is reset by a host write to the message
buffer via IBF or when a new message is stored into the message buffer after the message buffers
ND flag was reset by reading out the message buffer via OBF.
0 No message is lost.
1 Unprocessed message was overwritten.
11 ESB Empty slot channel B. In an empty slot there is no activity on the bus. The condition is checked in
static and dynamic slots.
0 Bus activity is detected in the configured slot on channel B.
1 No bus activity is detected in the configured slot on channel B.
10 ESA Empty slot channel A. In an empty slot there is no activity on the bus. The condition is checked in
static and dynamic slots.
0 Bus activity is detected in the configured slot on channel A.
1 No bus activity is detected in the configured slot on channel A.
9 TCIB Transmission conflict indication channel B. A transmission conflict indication is set if a transmission
conflict has occurred on channel B.
0 No transmission conflict occurred on channel B.
1 Transmission conflict occurred on channel B.
8 TCIA Transmission conflict indication channel A. A transmission conflict indication is set if a transmission
conflict has occurred on channel A.
0 No transmission conflict occurred on channel A.
1 Transmission conflict occurred on channel A.
7 SVOB Slot boundary violation observed on channel B. A slot boundary violation (channel active at the start
or at the end of the assigned slot) was observed on channel B.
0 No slot boundary violation is observed on channel B.
1 Slot boundary violation is observed on channel B.
6 SVOA Slot boundary violation observed on channel A. A slot boundary violation (channel active at the start
or at the end of the assigned slot) was observed on channel A.
0 No slot boundary violation is observed on channel A.
1 Slot boundary violation is observed on channel A.
5 CEOB Content error observed on channel B. A content error was observed in the configured slot on
channel B.
0 No content error is observed on channel B.
1 Content error is observed on channel B.
4 CEOA Content error observed on channel A. A content error was observed in the configured slot on
channel A.
0 No content error is observed on channel A.
1 Content error is observed on channel A.
3 SEOB Syntax error observed on channel B. A syntax error was observed in the assigned slot on channel
B.
0 No syntax error is observed on channel B.
1 Syntax error is observed on channel B.
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