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(2)
Remote frame
A remote frame is composed of six fields.
Remote frame
R
D
<1>
<2>
<3>
Figure 19-4
Remote frame
Note
1.
The data field is not transferred even if the control field's data length code
is not "0000B".
2.
D: Dominant = 0
R: Recessive = 1
(3)
Description of fields
<1> Start of frame (SOF)
The start of frame field is located at the start of a data frame or remote frame.
(Interframe space or bus idle)
R
D
Figure 19-5
Start of frame (SOF)
Note
D: Dominant = 0
R: Recessive = 1
• If dominant level is detected in the bus idle state, the start of frame is
recognized.
• If recessive level is detected at the sample point of the start of frame, the
preceding dominant level is judged as noise and the bus idle state is entered
again.
Preliminary User's Manual U17566EE1V2UM00
<5>
<6> <7>
<8>
Interframe space
End of frame (EOF)
ACK field
CRC field
Control field
Arbitration field
Start of frame (SOF)
Start of frame
(Arbitration field)
1 bit
Chapter 19
645
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