Omron 8025G Maintenance Manual page 118

THEORY OF OPERATION SECTION
A
Table 4-10. Input and output states of command decoder (XD2).
XE4 INPUT
XE4 OUTPUT
FUNCTION
D C B
A
MA7
MA6 MAS
MAO
Pin
State
0
0 0 0
-
Used to read status without
0
0 0
1
-
altering condition of interface
0
0
1
0 10
8
Master reset
0 0
1 1 11 9
Trigger BREAK one-shot (XD6)
0 1 0 0
-
0 1 0 1
Not used
i
-
I
/
0 1
1 0
-
0 1
1
1
-
1
0 0 0
3
2 Set data terminal ready flip-flop
(XES-10) to on
I'
0 0
1
4
3
Set request to send flip-flop
(XES-lS)
to
on
1
0
1
0 1 0 Set receiver flip-flop (XES-13
to on
1 0 1 1 2 1 Set transmitter flip-flop
(XES-12)
to
on
1
1
0 0 7 6 Reset data terminal ready
flip-flop
to
off
1 1 0 1 9 7
Reset request to send flip-flop
to off
1 1 1
0 5 4 Reset receiver flip-flop to off
1
1
1 1 6 5 Reset transmitter flip-flop to off
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