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JVC RX-807VTN

JVC RX-807VTN
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M
C7218
(C102):
PLL
Synthesizer
1.
The
main
function
descriptions
(1)
It
makes
the
local
oscillation
frequency
by
the
control
data
from
1C102.
(2)
Decode
the
control
signal
and
transmit
the
signal
for
receiving
conditions.
(3)
For
the
best
tuning,
count
the
internal-frequency
and
transmit
the
data
to
1C102.
2.
Terminal
Layout
3.
Block
Diagram
1
2
3
4
5
6
7
8
9
ted
Universal
Counter
Racy
ees
a
ea
|
4.
Pin
Functions
Xin,
Xout
Connect
to
the
crystal
oscillator
(7.2MHz).
Fix
the
chip
enable
to
“H”
when
inputting
(DI)
and
outputting
(DO)
the
serial
data.
Receive
the
control
data
from
the
controller
(IC421).
This
clock
is
used
to
synchronize
data
when
transmitting
the
data
of
DI
and
DO.
Transmit
the
data
from
LC7218
to
the
controller
which
is
synchronized
with
CK.
m
ia)
ce)
~<
an
A
Tuned
in
Receive
the
tuned
signal
from
IC104
(LA1266A).
Connect
to
GND.
H
:
Monaural
signal
Universal
counter
input
for
AM-IF
from
1C104
(LA1266A).
Universal
counter
input
for
FM-IF
from
IC104(LA1266A).
Outputthe
“IF-signal
request”
to
IC104
when
the
pin-7
(tuned
in)
goes
to
“H”.
Input
the
local
oscillator
signal
of
AM.
Input
the
local
oscillator
signal
of
FM.
Power
supply
terminal
PLL
charge
pump
output:
When
the
local
oscillator
signal
frequency
is
higher
than
the
reference
frequency,
high
level
signals
will
output.
When
it is
lower
than
the
reference
frequency,
low
level
signals
will
output.
When
it
is
same
as
reference
frequency
signals,
it
will
be
floating.
RX-807VTN
(No.
20333)
1-27

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