Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 20 CAN CONTROLLER
R01UH0042EJ0500 Rev.5.00 Page 909 of 1513
Aug 12, 2011
Table 20-13. Types of Error States
Type Operation
Value of Error
Counter
Indication of C0INFO
Register
Operation Specific to Error State
Transmission 0 to 95 TECS1, TECS0 = 00
Reception 0 to 95 RECS1, RECS0 = 00
Transmission 96 to 127 TECS1, TECS0 = 01
Error active
Reception 96 to 127 RECS1, RECS0 = 01
• Outputs an active error flag (6 consecutive dominant-
level bits) on detection of the error.
Transmission 128 to 255 TECS1, TECS0 = 11Error passive
Reception 128 or more RECS1, RECS0 = 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).
Bus-off Transmission
256 or more
(not indicated)
Note
BOFF = 1,
TECS1, TECS0 = 11
• Communication is not possible.
However, when the frame is received, no messages
are stored and the following operations are
performed.
<1> TSOUT toggles.
<2> REC is incremented/decremented.
<3> VALID bit is set.
• If the initialization mode is set, after request to transit
to an operation mode other than the initialization
mode, 11 consecutive recessive-level bits are
generated 128 times, and then the error counter is
reset to 0 and the error active state can be restored.
Note The value of the transmit error counter (TEC) does not carry any meaning if BOFF has been 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.