NEC UPD703116 User Manual page 527

<2> Remote frame
A remote frame is transmitted when the receiving node issues a transmit request.
A remote frame is similar to a data frame, except that the "data field" is deleted and the RTR bit of the
"arbitration field" is recessive.
R
D
<1> <2>
Remark The data field is not transferred even if the control field's data length code is not "0000B".
(2) Description of fields
<1> Start of frame (SOF)
The start of frame field is a 1-bit dominant (D) field that is located at the start of a data frame or remote
frame.
(Interframe space or bus idle)
• The start of frame field starts when the bus line level changes.
• When "dominant (D)" is detected at the sample point, reception continues.
• When "recessive (R)" is detected at the sample point, bus idle mode is set.
CHAPTER 11 FCAN CONTROLLER
Figure 11-9. Remote Frame
Remote frame
<3> <5> <6> <7>
Figure 11-10. Start of Frame (SOF)
Start of frame
R
D
1 bit
User's Manual U14492EJ5V0UD
<8>
Interframe space
End of frame (EOF)
ACK field
CRC field
Control field
Arbitration field
Start of frame (SOF)
(Arbitration field)
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