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PX-
(3-3)
Other
circuits
(1)
The
L/
H
status
of the
acknowledge
signal
(LACK)
(changed according
to
remote
control
signals
from LD-700)
is
read
by
the
CPU
via
bit
7 of th
e
LCON
register.
(See
Fig.
13-24.)
(2)
SELECTO
is
a control
output
passed to
LD-
7
00
units.
Wired remote
control
is
valid
when
SELECTO
is
L,
and
i
nfra-red
remote
control
is
valid
when
SELECT
O
is
H.
(3)
That
is,
SELECTO
is
changed
to
L
to enable
LREMO.
(See
Fig.
13-25.)
(4)
If
there
is
no
SELECTI
input,
S
ELECTO
is
changed
to
L
to enable
LREMO
when
SEL-
CONT
i
s
+5V,
but
is
changed
to
H
to disable
LREM
O
when
S
ELCONT
is
0V.
(5)
The
SELECTI
input
is
applied to
the
stereo
mini-jack
R
terminal (the
L
terminal being
for
EXTREMI
inputs).
EXTfiEMI
(6)
If
the
SD-26
control
output
is
connected
by
mini-plug
to
the
stereo mini-jack
as
shown
in
Fig.
13-25,
SELECTI
makes
contact with the
plug
GND
and
is
consequently changed
to L.
(7)
Therefore,
when
SELCONT
is
ch anged
to
L,
SELECTO
can
be changed
to
L
and
EXTREMO
can be
enabled.
Gate
array
Fig.
13-24
Acknowledge
read
circuit
I-
Hs
-
*
Fig.
13-25
Select
circuit
Fig.
13-26
System
control
circuit
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