NEC V850ES/F 3-L Series User Manual page 537

CAN Controller (CAN)
Figure 18-11
Note
Figure 18-12
Note
Figure 18-13
(f) ACK field
The ACK field is used to acknowledge normal reception.
(CRC field)
R
D
ACK field
D: Dominant = 0
R: Recessive = 1
• If no CRC error is detected, the receiving node sets the ACK slot to the
dominant level.
• The transmitting node outputs two recessive-level bits.
(g) End of frame (EOF)
The end of frame field indicates the end of data frame/remote frame.
(ACK field)
R
D
End of frame (EOF)
D: Dominant = 0
R: Recessive = 1
(h) Interframe space
The interframe space is inserted after a data frame, remote frame, error frame,
or overload frame to separate one frame from the next.
• The bus state differs depending on the error status.
– Error active node
The interframe space consists of a 3-bit intermission field and a bus idle
field.
(Frame)
R
D
Interframe space (error active node)
User's Manual U18743EE1V2UM00
ACK field
ACK slot ACK delimiter
(1 bit)
End of frame (Interframe space or overload frame)
(7 bits)
Interframe space
Intermission
(0 to ∞ bits)
(3 bits)
Chapter 18
(End of frame)
(1 bit)
(Frame)
Bus idle
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