msm9225 Oki Semiconductor, msm9225 Datasheet - Page 58

• Manufacturer Part Number: msm9225
• Description: Can Controller Area Network Controller
• Manufacturer: Oki Semiconductor

* REC: Receive Error Counter
(c) Bit error occurring during intermission
Note) When an error has occured, error control is performed by the error counter at that time.
¡ Semiconductor
Receive node has detected an error
(excluding bit errors within the active error flag or
overload flag)
Receive node detects "dominant" after error flag output
of error frame
Transmit node transmits error flag
[when error counter = 0]
(1) Error passive state and Ack error detected, but
"dominant" not detected in passive error flag output
(2) Stuff error occurred during arbitration field
Bit error detected in output of active error flag, overload flag
(error active transmit node)
Bit error detected in output of active error flag, overload flag
(error active receive node)
Each node detects 14 consecutive "recessive" bits from the
beginning of the active error flag or overload flag, and 8
consecutive "dominant" bits detected thereafter
Each node detects 8 consecutive "dominant" bits after the
passive error flag
Transmit node completes transmission without errors
Receive node completes reception without errors
Overload frame is generated.
After an error flag is output, the indicated values are added to the error counter.
State
(±0 when error counter = 0)
Transmit error counter
No change
No change
No change
No change
+8
+8
+8
–1
Receive error counter
(1) –1
(2) ±0 (REC = 0)
(3) Set to 127
(1 £ REC £ 127)
No change
No change
No change
+1
+8
+8
+8
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