Frame Types; Data Frame And Remote Frame; Table 16-2: Frame Types - NEC V850E/RS1 User Manual

16.2.2 Frame types

The following four types of frames are used in the CAN protocol.
Data frame
Remote frame
Error frame
Overload frame
(1) Bus value
The bus values are divided into dominant and recessive.
• Dominant level is indicated by logical 0.
• Recessive level is indicated by logical 1.
• When a dominant level and a recessive level are transmitted simultaneously, the bus value

16.2.3 Data frame and remote frame

(1) Data frame
A data frame is composed of seven fields.
Remark:
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Frame Type
Frame used to transmit data
Frame used to request a data frame
Frame used to report error detection
Frame used to delay the next data frame or remote frame
becomes dominant level.
R
D
<1> <2> <3>
D: Dominant = 0
R: Recessive = 1
User's Manual U16702EE3V2UD00
Chapter 16 FCAN Controller

Table 16-2: Frame Types

Description
Figure 16-3: Data Frame
Data frame
<4> <5> <6> <7> <8>
Interframe space
End of frame (EOF)
ACK field
CRC field
Data field
Control field
Arbitration field
Start of frame (SOF)
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