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Table I-2. Signal interrelations
On-Line
]SLCTlN
IERROR
1
BUSY
)
ACKNLG
1
DATA
ENTRY
1
OFF
ON
ON
HIGH/LOW
LOW
HIGH HIGH
LOW
HIGH
HIGH
Not
generated
Disabled
LOW/HIGH Generated
after
data
entry
Enabled
Same
Same
Enabled
(normal
entry)
<-When
SLCT IN is at high level, data entry is enabled, but the input
data will be disregarded until SLCT IN is at low level.
Note: ERROR status is assumed to rest only in off-line state, and
the ERROR status does not always mean SLCT IN.
I-4