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RX-G7ORBK
BW 1¢C7218 (iC121) : PLL Synthesizer
1. The main function descriptions
(1)
It makes the local oscillation frequency by the control data from IC201.
(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 1C201.
2. Terminal Layout
3. Block Diagram
SYC
1
&
xin U1]
Driver
Pps
X OUT
PD2
fs
]
TUNED
a
|
AMIF
STOP IN
—|
POWER
asc
41
wed
Universal
OUTO
1
2
3.4
5
6
INO
IN1
in Functions
| 1.24 |
| 4 |
is Sa
| 6 |
a
5
Symbol
1,24
|Xin,Xout
|I/O]
Crystal oscillator (7.2MHz).
E
oO
oO -
Fix the chip enable to "H" when inputting (DI) and outputting (DO) the serial data.
Receive the control data from the controller (IC201).
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 1C102 (LA1836).
Connected to GND
|
Not used.
$s
TUNE
STOP IN
POWE
Qsc
MON
~< im)
7
w
Not used.
11
It is "H" on FM-monaural,
"L" on FM-Stereo.
mM [Oo Re"\"ontMmode
SSSCSCSCSCSCSCSCSCSY
vw [0] itwU onMWmode
SSCS
LW
| 0 | It is "L" on LW mode.
[universal counter input for AWA from 1C1OB (ATR. ———SSCSCS~S~S
FT universal counter input for FMF from iCwoa(Lar@a6.
SSCS
Fo | output the "Irsignal request" 10 1C102_ when the pin-7 (ured in) goesto Wd
ts
Pt
= °
15
16
AM-IF
FM-IF
— —=]Jo]—
~ Plwln
18
AM OSC
FM OS
Input the local oscillator signal of AM.
Input the local oscillator signal of FM.
This is a terminal of power supply.
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.
Not used.
Connected to GND
(No. 20489)
2-5
on
N Oo
Vop
PD1
22
PD2
23
Vss
par
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