Table 16-13: Types Of Error States - NEC V850E/RS1 User Manual

Type
Error
active
Error
passive
Bus-off
Note: The value of the transmit error counter (TEC) does not carry any meaning if BOFF has been
Remark:
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Table 16-13: Types of Error States

Value of Error
Operation
Counter
Transmission 0 to 95
Reception 0 to 95
Transmission 96 to 127
Reception 96 to 127
Transmission 128 to 255
Reception 128 or more
256 or more
(not indi-
Transmission
Note
cated)
set. 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 occurs, the counter is not incremented and the bus-off state is
assumed.
n = 0, 1
Chapter 16 FCAN Controller
Indication of CnINFO
Register
TECS1, TECS0 = 00
RECS1, RECS0 = 00
• Outputs an active error flag (6 consecutive
dominant-level bits) on detection of the error.
TECS1, TECS0 = 01
RECS1, RECS0 = 01
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
RECS1, RECS0 = 11
transmissions, following an intermission
(suspend transmission).
• Communication is not possible.
<1> TSOUT toggles.
<2> REC is incremented/decremented.
<3> VALID bit is set.
BOFF = 1,
• If the initialization mode is set and then 11
TECS1, TECS0 = 11
recessive-level bits are generated 128 times
in a row in an operation mode other than the
initialization mode, the error counter is reset
to 0 and the error active state can be
restored.
User's Manual U16702EE3V2UD00
Operation Specific to Error State