upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 542

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

Note: The value of the transmit error counter (TEC) does not carry any meaning if BOFF has been
Remark:
542
Error
active
Error
passive
Bus-off
Type
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.
Transmission
Reception
Transmission
Reception
Transmission
Reception
Transmission
Operation
n = 0, 1
Value of Error
0 to 95
0 to 95
96 to 127
96 to 127
128 to 255
128 or more
256 or more
(not indi-
cated)
Counter
Note
Table 16-13: Types of Error States
Chapter 16 FCAN Controller
User’s Manual U16702EE3V2UD00
TECS1, TECS0 = 00
RECS1, RECS0 = 00
TECS1, TECS0 = 01
RECS1, RECS0 = 01
TECS1, TECS0 = 11
RECS1, RECS0 = 11
BOFF = 1,
TECS1, TECS0 = 11
Indication of CnINFO
Register
• Outputs an active error flag (6 consecutive
• Outputs a passive error flag (6 consecutive
• Transmits 8 recessive-level bits, in between
• Communication is not possible.
• If the initialization mode is set and then 11
dominant-level bits) on detection of the error.
recessive-level bits) on detection of the error.
transmissions, following an intermission
(suspend transmission).
<1> TSOUT toggles.
<2> REC is incremented/decremented.
<3> VALID bit is set.
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.
Operation Specific to Error State