BAT32G1x9 user manual | Chapter 22 CAN control
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Rev.1.02
22.2.2
Frame type
The four frame types in the following table are used in the CAN protocol.
Table22-2. Frame Type
The frame type
description
Data frames
The frame used to transmit the data
Remote frames
Go to the signal that requests the data frame
Error frame
A signal used to report an error
Overload frames
Lets you set a delay to wait for the next data frame or remote frame
(3) Bus value
Bus values are divided into explicit and implicit
- The dominant value is logically 0
- The implicit value is logical 1
- When a bus is both dominant and implicit, the state of the bus is displayed as dominant
22.2.3
Data frames and remote frames
(4) Data frames
A data frame consists of 7 different bit fields
Figure 22-3. Data frames
Data frames
R
D
Inter-frame space
End of Frame (EOF
).
Acknolwdge
field
CRC field
Data farm
Control the
field
Arbitration Venue
Frame Start (SOF
).
Note:
D: Dominant
=0
R: Recessive = 1
<1>
<2>
<3>
<4>
<5>
<6><7>
<8>