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Chapter 18
AFCAN Controller
User’s Manual U16580EE3V1UD00
Note:
The value of the transmission error counter (TEC) is invalid when the BOFF bit is set to 1. If an
error that increments the value of the transmission error counter by +8 while the counter value is
in a range of 248 to 255, the counter is not incremented and the bus-off state is assumed.
Table 18-13:
Types of error states
Type
Operation
Value of Error
Counter
Indication of
CnINFO Register
Operation Specific to Error State
Error active
Transmission
0 to 95
TECS1, TECS0 = 00
Outputs an active error flag (6 consecutive
dominant-level bits) on detection of the error.
Reception
0 to 95
RECS1, RECS0 = 00
Transmission
96 to 127
TECS1, TECS0 = 01
Reception
96 to 127
RECS1, RECS0 = 01
Error passive
Transmission
128 to 255
TECS1, TECS0 = 11
Outputs a passive error flag (6 consecutive
recessive-level bits) on detection of the error.
Transmits 8 recessive-level bits, in between
transmissions, following an intermission
(suspend transmission).
Reception
128 or more
RECS1, RECS0 = 11
Bus-off
Transmission
256 or more
(not
indicated)
Note
BOFF = 1,
TECS1, TECS0 = 11
Communication is not possible.
Messages are not stored when receiving frames,
however, the following operations of <1>, <2>,
and <3> are done.
<1> TSOUT toggles.
<2> REC is incremented/decremented.
<3> VALID bit is set.
If the CAN module is entered to the initialization
mode and then transition request to any
operation mode is made, and when 11
consecutive recessive-level bits are detected
128 times, the error counter is reset to 0 and
the error active state can be restored.
Содержание MuPD70F3187
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Страница 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
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 ...
Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Страница 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
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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