EP80579 Datasheet, PDF (1575/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
39.4.3.2
Remote Frame
In the CAN protocol, it is also possible for a destination node to request data from a
source. This can be done by transmitting a Remote Frame with an identifier that
matches the identifier of the required Data Frame. This request results in a response
from the source with the matching identifier, including the Data Frame. If a node were
to transmit a Data Frame at the same time as a node were to send a Remote Frame
with the same identifier, the Data Frame would win arbitration due to the dominant RTR
bit.
Figure 39-4. Standard CAN Remote Frame
Standard Remote Frame
Recessive level
Bus Idle _{1 11 1 1 1 4}
Dominant level
Start of Frame
Arbitration Field
Identifier
RTR Bit (R)
IDE Bit (D)
Control Field _{Reserved (D)}
DLC
15 1 1 1 7
3 ^{Bus Idle}
CRC Field
CRC Sequence
CRC Delimiter
Acknowledge Field
ACK Slot
ACK Delimiter
End of Frame
Intermission
The format of an Extended Remote Frame is shown in Figure 39-5.
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
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