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CHAPTER 18 IEBus CONTROLLER (V850/SC2)
User’s Manual U15109EJ3V0UD
547
Table 18-10. Communication Error Cause Processing List (2/2)
Overrun Error
Underrun Error
Local node
status
During reception
During transmission
Occurrence
condition
DR read is not executed by next data
reception timing
DR write is not executed by next data
transmission timing
Occurrence
condition
Occurrence
location
Other than
data field
Data field
Other than
data field
Data field
Hardware
processing
−
•
Reception stopped
•
INTIE2 generated
•
To start bit wait status
Remarks 1.
Communication
between other
nodes does not
stop.
2.
Data reception is
not possible until
the overrun status
is cancelled.
−
•
Transmission stopped
•
INTIE2 generated
•
To start bit wait status
During
broadcast
communication
Software
processing
−
•
Execute DR read to cancel
overrun status
•
Error processing (resend
request, etc.)
−
•
Error processing (resend
request, etc.)
Hardware
processing
−
•
INTIE2 not generated
•
NACK returned
•
Data reset from other node
Remark
Data reception is not
possible until the
overrun status is
cancelled.
−
•
Transmission stopped
•
INTIE2 generated
•
To start bit wait status
During individual
communication
Software
processing
−
•
Execute DR read to cancel
overrun status
•
Error processing (resend
request, etc.)
−
•
Error processing (resend
request, etc.)
Parity Error
Local node
status
During reception
During transmission
Occurrence
condition
Receive data and receive parity don’t match
−
Occurrence
condition
Occurrence
location
Other than data field
Data field
Other than
data field
Data field
Hardware
processing
•
Reception stopped
•
INTIE2 generated
•
To start bit wait status
Remark
Communication between other nodes does not stop.
−
−
During
broadcast
communication
Software
processing
•
Error processing (resend request, etc.)
−
−
Hardware
processing
•
Reception stopped
•
INTIE2 generated
•
To start bit wait status
•
Reception not stopped
•
INTIE2 not generated
•
NACK returned
•
Receive data sent from other
nodes
−
−
During individual
communication
Software
processing
•
Error processing (resend
request, etc.)
−
−
−