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9.10.3 Bus
Off
Interrupt
Class: 3 (0x3)
Instance: 1 (0x1)
Attribute: 3 (0x3)
Bus Off Interrupt (BOI) determines the action if the Bus Off state is
encountered. The following values are supported (default value = 0)
Value Action
0
CAN chip is not reset. Manual reset of the device is
required.
1
Device attempts to reset itself. After 10 attempts, an error
is raised, and a manual reset is required.
9.10.4 Bus
Off
Counter
Class: 3 (0x3)
Instance: 1 (0x1)
Attribute: 4 (0x4)
The Bus Off counter counts the number of times the CAN chip went to
the “bus off” state. The counter has values of 0 to 255 decimal. The
“bus off” counter is reset to zero whenever set regardless of the data
value written. The Bus–off Counter is initialised to zero at power–up or
device initialisation.
The transmission of a Set_Attribute_Single request to the Bus–off
Counter is all that’s required to reset the counter.
9.10.5 Allocation
Byte
Class: 3 (0x3)
Instance: 1 (0x1)
Attribute: 5 (0x5)
b7 b6 b5
b4
b3
B2 b1 b0
Ack
Suppress
Polled
Explicit
Message
Any bit set to 1 indicates that a request is being made to allocate that
particular connection.