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AN07-00180-3E
1. Data frame
Transfer format for data transmit. It consists of seven fields.
Field name
Start of frame (SOF)
Arbitration field
Control field
Data field
CRC field
ACK field
End of frame (EOF)
Description
1- bit field containing “0” that indicates the start of a data
frame
Field that determines the priority of the data. This field is
also called the ID field and there are two types of format;
standard format and extended format. The standard format is
12 bits and extended format is 32 bits.
6-bit field that indicates the length of the data field.
0-byte to 8-byte field that stores real data.
16-bit field that serves to allow a check of the transmitted
frame validity.
2-bit field that is used to notify of successful reception.
7- bit field containing “1” that indicates the end of the data
frame.
2.
Remote frame
Usually, in CAN, a form of transmit of communication information to a node is generally used,
but it is also allowed to request a specific node to transmit specific data. For this purpose, the
remote frame is available.
The remote frame has almost the same configuration with the data frame; it consists of six fields
except the data field. The control field of the remote frame indicates the length of the data field
for the requested data.
3. Error frame
Transfer format immediately sent on error detection on a node. The error frame consists of two
fields.
Field name
Error flag
Error delimiter
Description
6-bit to 12-bit field that indicates the error type.
8- bit field containing “1” that indicates the end of the error
frame.
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