645
CAN Controller (CAN)
Chapter 19
Preliminary User’s Manual U17566EE1V2UM00
(2)
Remote frame
A remote frame is composed of six fields.
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.
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.
R
D
Interfr
a
me
s
p
a
ce
End of fr
a
me (EOF)
ACK field
CRC field
Control field
Ar
b
itr
a
tion field
S
t
a
rt of fr
a
me (
S
OF)
Remote fr
a
me
<1>
<2>
<
3
>
<5>
<6>
<7>
<
8
>
R
D
1
b
it
S
t
a
rt of fr
a
me
(Interfr
a
me
s
p
a
ce or
bus
idle)
(Ar
b
itr
a
tion field)
electronic components distributor