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RX-504VBK/RX-504VLBK
RX-505VTN/RX-SO5VLTN
M
C7218 (1C102) : PLL Synthesizer
1. The main function descriptions
(1) It makes the local oscillation frequency by the control data from 1C421.
(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 1C421.
2. Terminal
Layout
3. Block Diagram
Pata
Sas SS Sara ae sae SS Seta RST
ane
res se
1
6 SYC
S a e e d
Cee
ae
1
|
Reference
Phase Detector
r
I
X out
XIN 1 fF
| >°
a
Diver
Charge Pump
PH
PDI
Vss
X OUT 24[g
PD2
PD2
|
FMin 19
| ><
Vpo
{
|
I
FM-in
1
I
ame
:
rum
Lets
in
AM in 18
.
!
IF
1
i]
ae
}—
|
Universal
we
cee
=e |
Counter
voD
D3
oe
!
s
23 VSS
AMF
ca 4
DO 5
me
t
be
Lw
iw
me eee oe FS)
rg —
fo —
a
ee
4
3
10
11
12°13
«14 «17
7
8
OUTO
1
2
3°94
5
6 INO
IN1
4. Pin Function Description
Pin No.| Symbol
Functions and Operations
Crystal oscillator (7.2MHz).
| 2
|
ce
{I
[Fix the chip enable to "H" when inputting (D!) and outputting (DO) the serial data.
Receive the control data from the controller (C421).
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 CL.
Not used.
Receive
the tuned signal from IC104 (LA1266A).
Not used.
Non connection
Lt
Lt
0 |
=
Lt
Erect
i]
| Qsc__ | -- [ON mode with "H" and OFF mode with "L". (Non connection)
LO |
| 0 |
LO |
0 |
Lt
|i
It is "H" on FM-monaural, "L" on FM-Stereo.
It is "L" on FM mode.
It is "L" on MW
mode.
| 0 |
a
[Fein | 1 [input the local oscillator signal of FM.
SSCS
20
[Von |= [Power supplyterminal. SS
SSSCSCSCSCSCSCSCSCSCSCSC~C~—S
PLL charge pump output: When the local oscillator signal frequency is higher than
21
jr
fos
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.
[22|_pb2__[ = | Non connection
[23 | __vss [= [Power supp.
SSSSOSCSCSSCCCSCSCSSS
1-26 (No.20220)
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