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OCR Type A230
Timing chart for errors
No parallel output handshake, no error occurs
D1 to D8
ERROR
Parallel output handshake, no error
occurs
D1 to D8
OK
ERROR
OVF
Parallel output handshake, overflow occurs
D1 to D8
OK
ERROR
OVF
ERR
OK
OVF
OK
18.2
Error Signal Output Conditions (Parallel)
No parallel output handshake, error
occurs
D1 to D8
ERROR
Parallel output handshake, error occurs
D1 to D8
OK
ERROR
OVF
When an error occurs during numerical calculations
and judgement output, handshaking starts and the
error signal turns on at the same time.
When there is an error in the numerical calculations,
OVF (overflow signal) turns on only when the register
in which the error occurred is output.
Error Output
OK
ERR
18 − 7
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