CHAPTER 11 FCAN CONTROLLER
532
User’s Manual U14492EJ3V0UD
<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.
Figure 11-8. Remote Frame
R
D
Interframe space
End of frame (EOF)
ACK field
CRC field
Control field
Arbitration field
Start of frame (SOF)
Remote frame
<1>
<2>
<3>
<5>
<6>
<7>
<8>
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.
Figure 11-9. Start of Frame (SOF)
R
D
1 bit
Start of frame
(Interframe space or bus idle)
(Arbitration field)
• 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.
Содержание V850E/IA1 mPD703116
Страница 2: ...2 User s Manual U14492EJ3V0UD MEMO...