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Chapter 18
AFCAN Controller
User’s Manual U16580EE3V1UD00
•
Operation in error status
18.2.4 Error
frame
An error frame is output by a node that has detected an error.
Figure 18-15:
Error frame
Note:
D: Dominant = 0
R: Recessive = 1
Table 18-6:
Operation in error status
Error Status
Operation
Error active
A node in this status can transmit immediately after a 3-bit
intermission.
Error passive
A node in this status can transmit 8 bits after the intermission.
Table 18-7:
Definition of error frame fields
No.
Name
Bit count
Definition
<1>
Error flag 1
6
Error active node:
Outputs 6 dominant-level bits consecutively.
Error passive node: Outputs 6 recessive-level bits consecutively.
If another node outputs a dominant level while one node is outputting
a passive error flag, the passive error flag is not cleared until the
same level is detected 6 bits in a row.
<2>
Error flag 2
0 to 6
Nodes receiving error flag 1 detect bit stuff errors and issues this
error flag.
<3>
Error delimiter
8
Outputs 8 recessive-level bits consecutively.
If a dominant level is detected at the 8th bit, an overload frame is
transmitted from the next bit.
<4>
Error bit
–
The bit at which the error was detected.
The error flag is output from the bit next to the error bit.
In the case of a CRC error, this bit is output following the ACK
delimiter.
<5>
Interframe
space/overload frame
–
An interframe space or overload frame starts from here.
<1>
R
D
<2>
<3>
6 bits
0 to 6 bits
8 bits
(<4>)
(<5>)
Interframe space or overload frame
Error delimiter
Error flag 2
Error flag 1
Error bit
Error frame
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Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
Страница 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
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Страница 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
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Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Страница 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Страница 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
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