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DR-E34BK
DR-E34LBK
IC102 : LC7218 (PLL Synthesizer)
1. The main function descriptions
(1) It makes the local oscillation frequency by the control data from IC401.
(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 IC401.
2. Terminal Layout
3. Block Diagram
6 SYC
Phase Detector
'
!
'
t
Ls
Charge Pump
Vss
XOUT
24[9
ry22 PD2
t
PD2
1
t
Fy
eat
\
16 HCTR
FMin 1919
'
Vpp
1
1
1
1
FM-in
{
1
t
i
AN-In
Pls Lctr
AMin
18
'
OUTS
H
1
}
t
HCTR
1
!
1
:
1
LCTR
Universal
1
|
Counter
4420 voo
-_ b :|
Cc a wu
oR
wawnr
f]
fi
se 23 VSS
1
OUTO
1
2
3
4
5
6 INO
INT
4. Pin Function Description
Crystal oscillator (7.2MHz).
2
{| cece 1 [Fix the chip enable to "H" when inputting (DI) and outputting (DO) the serial data.
| 3
|
odo
{| DI
{1
[Receive the control data from the controller (IC401).
4
| ct
tt
[This clock is used to synchronize data when transmitting the data of DI and DO.
| 5
| 00
{| 00 [0
[Transmit the data from LC7218 to the controller which is synchronized with CL.
SS
cS
NF (727
ca
| 7 | INO | Tuned in | 1 [Receive the tuned signal from IC10a(LA1266A).
—SSSC~—~—"~*~*~*~*~*~*~*~S~SCS
Eee iW
semi iNote
[3 [eure | power _[ 0 [Now used.
Q5¢__|
0 [ON mode with "Hand OFF mode with =b=
[i [ure | MONG ['O |e 7A" on FMCmonaural, "L* on FMSter@o.
2
[ours_[ Fo fits 7H" on FM mode, ——
[3 [outa] ww [0 fie is 7 on AM
mode
peas a
CONG ay a
Ae NO
ne ee
a
[15 [tere | AMF [1 [Universal counter Input for AMO Wom (C104 (la z66A
p16 | CTR [FMF {1 [Universal counter input for FM-IF from ICI04(LA1266A).
| 17
| OUT6 | IF REQ | O [Outputthe "IF-signal request" to IC104 when the pin-7 (tuned in) go to "H".
18 | Awin—|Aitin [1 [input the focal oscifator signal of
AM.
[19 |Fimin | Fain 1 [input the local osclator signal of
Fu,
| 20 |
Von
|
Vpp | — | This is a terminal of power supply.
PLL charge pump output: When
the local oscillator signal frequency is higher than
fs fom | me fo}
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.
fe oie anor] poae tO Nobusi
ee
p23 | vss of vss | — [Power supply,
1-22
(No. 20162)
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