Sony STR-S5L - IC Terminal Functions

FUNCTIONS OF IC3O3
TERMINALS
I
S{urve
I
Input
DOWN
MANU
I
-
MEMO
Input
When UP search
is indicated,
holds at
low
for more than
5
msec.
when
low level
is maintained
during
uP
search,
search
continues
even when s{urve
voltage
is
applied
to S-Curve
terminâI.
Auto search
station
selection
input
terminal.
Starts
DOWN search
at
low, stops
when S-Curve
voltage is applied
to S{urve
terminal
and
after
AFC operation.
When
DOWN search
is
indicated,
holds at low
for more than 5
msec'
when low level
is maintained
during
DowN search,
search
continues
even
when
s-curve
I
-
Manual station
selection
state
is cancelled
when any
one of
the UF,DôWN
or
channel
input terminals
goes
low.
-
Preset memory
input
terminal.
-
Enables memory
while it
is
holding at
low.
-
The
external
comparator
output signal
which
forms the
A/D convertel
during
manual
mode
is applied.
-
At
high, counts
up 10
bits
data and
ladder output
voltage rises.
At low. counts
down
10
bits data
and
ladder
output
voltage
decreases.
Output
terminal
which
controls
radio
sensitivity
during auto search.
At
low only
during search;
usually
at
high.
;T*-
Pin No. Pin
Name
Input/Output
Function
I
CRr
Input/Output
Generates
LSI system
basic clock
signal
by connecting
to
CR time
constant
circuit and
forming oscillator
circuit.
(oscillation
period:
0.8
msec)
2
CRz
Input/Output
Forms
timer
circuit
by connecting
with
CR time
constant
circuit.
Determines
pulse
width,
etc. of
MUTE output signal
during band
switching.
(operation
time:
0.5
sec)
J
BUC
Input
Back-up
control
terminal; is
in
back-up state
at
low level
TEST
Input
TEST
terminal
of LSI
internal
circuit.
In
TEST state
at
high level.
f
FM
Input
FM band input
terminal.
At low, achieves
FM reception
state
and maintains
it even if
it later
goes
high.
(Holds
at low
for more than 5
msec.)
6
MW
Input
MW band
input terminal.
At
low, achieves
MW reception state
and
maintains
it even if it
later
goes
high
(Holds
at
low for more
than 5
msec.)
7
LW
Input
LW
band input
terminal.
At low,
achieves LW
reception
state and
maintains
it even if it
later
goes
high.
(Holds
at low
for more
than 5
msec.)
8
F/A
OUT
Outpu
Outputs
control signal
which indicates
band
reception state.
FM band . ....
high
AM band
low
(MW/LW)
lo
M/L OUT
Output
Outputs
control signal
which indicates
band reception
state.
MWband.....high
LW band .
.... low
Not used in this
model.
l0
CV OUT
Output
Output
of analog
signal
transfer
gate;
outputs
varactor impressed
voltage.
Input
qi
analog signal
transfer
gate;
inputs
ladder
output
voltage.
11
CV
IN
lnput
t2
Manu Tune
Input
Input of analog
signal
transfer
gate;
inputs
l:"19,'
Inputs S-Curve
voltage
of
F-M, AM.
tuning
voltage
generated
by
vari4ble
-
Input of LSI
comparator;
inputs
control signal
for AFC operation'
.Auto
search
station
selection
input terminal'
Starts
UP search
at
low, stops
when S-Curve
voltage is applied
to S-curve terminal
after
AFC
operation.
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