upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 657

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

CAN Controller (CAN)
Type
Error active
Error passive
Bus-off
Table 19-13
Operation
Transmission
Reception
Transmission
Reception
Transmission
Reception
Transmission
Note
Types of error states
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.
Preliminary User’s Manual U17566EE1V2UM00
Value of Error
Counter
0 to 95
0 to 95
96 to 127
128 to 255
128 or more
256 or more
(not
indicated)
96 to 127
Note
Indication of
CnINFO Register
TECS1, TECS0 = 00
RECS1, RECS0 = 00
TECS1, TECS0 = 01
RECS1, RECS0 = 01
TECS1, TECS0 = 11
RECS1, RECS0 = 11
BOFF = 1,
TECS1, TECS0 = 11
Outputs an active error flag (6 consecutive
Outputs a passive error flag (6 consecutive
Operation Specific to Error State
dominant-level bits) on detection of the error.
recessive-level bits) on detection of the error.
Transmits 8 recessive-level bits, in between
transmissions, following an intermission
(suspend transmission).
Communication is not possible.
<1> TSOUT toggles.
<2> REC is incremented/decremented.
<3> VALID bit is set.
If the initialization mode is set and then 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.
Chapter 19
657