TX-7430
Pin No .
Symb
ol
Te rmina l
Dc scripiion
22
SO
Sta tion det e
etor
signal input
Input termi nal for de tee ting
whethcr
or not a brondcast signal is bcing
reeeiv ed d uri ng uu
io-
tu ning.
Stopped
by t he high level.
2:\, 24 EOI, E02
Err
or o u rp u rs
Char
ge pum p ou tp ur of thc phas e detecror with
cons
i i ru res th e PL L. High
level is o utpu t whc n
t he dividcd oscillation frcqu c ucy is highcr rhan
ih
c
refc ren cc frcqu cn cy. In th e op pos iie case , low le vel is output. Floa ting
occ urcs whcn thc frcq ucucies match . T he o
utp
ur is npp licd 10 the varia ble
ca paci
tor
diode in rhe fro nt
end
thr
ou gh rhc low pass filler Q
I04
a nd Q
I05
.
T he
ou
lp
u t fro m bot h tcrm iuals is sa me , but o nly E0 2 is usc tl.
25 CE Chip
enab
le Deviee selcction signal inp ut t
ermin
al .
High lcvcl
l. ow le vel ... Mem ory pre sc rv.u ion
... No rma l op era no n
26
FM FM local ose illato r
slgnal
input
Input termin al
[or FM loeal osc ill.uor
is divided by I/l o o r
1/17 by prcscalcr
Q7()1.
--- ---
27
AM
A M loeal osc illa ro r
signa l
inp
ut
Termin
al
for inp ut o f ihe
A M local oscill.uor signal.
2R PSC Pu lse swallow
com ro l ou tpu t
Thi s t
ermin
al
outpu
ts a signal t luu swirchcs t he pre sc.iler division r.uio of
Q70 1
to 1/10 o r 1/17 whe n rhc pu lse swa llow meihod is used [or d ivision.
(FM only)
29
G NO
Grou
nd
---
-
30 S
HIFT
Pre set rcve rsc
indieatio n ou tp ur
Te rmina l fo r ind ienn on ou tp ul whei her
MI - M8: Low lcvcl M9 - M 10: High
MI - MS o r
M9 - MI Il the prese t key.
level
31
32
LW
MW
Ba nd switching
signal o urputs
Terminal
s for signal o utpul switehing of cach band . High level is outp ul frorn
terminal of FM (pi n
11
0.
33) .md low lcve l is out put lro rn o rher t e rm inals
(pin no . 3 1
& 32) duriug r M rece prio n
33
34
35
30
37
r-M
A
B
C
0
Prese t sra rion
indica rion OUlpU
IS
Te
rmi na ls for
MI M2
A
I
()
n
()
I
C
() ()
0
() ()
..
-
-
ßCO
code o utpur of pre sc t stutio n indic.
uor.
M3 M4 M5 MIl M7 MS
I
()
I 0 I
()
I
()
0 I I 0
()
I
I I I
()
()
()
() ()
()
I
3R INT
Not
uscd.
39
MEMO
RY Merno ry down
inpu t
Terminal
for
down signal
inp ut o f p re set
Acriv e low.
mc m
ory.
-
,.j()
4 \
42
ME M
OR
Y
UP
AUTO
I
MANUAL
MUTE
Mem ory up
inpu
t
A u
to/Ma
nu al
indi
cation
outp
ur
Mur ing o ut
pu l
-
T
ermin
al for
up signa l inpu t
of pre sc t mem ory.
Ac iive low.
Te
rmina l Ior irul ica tion
output
whe t her or auto i he tuni ng mod e.
T his t
erm
inal becom es hig h dm ing ,1
11
10 morle a nd low (hlring munu nl mo de ,
O utput t
ermin
al which
mute
s rhe shoc k noisc oeeurring whcn rhe PLL is
released; nctivc high . T in: muti ug signal is outpur as show n below .
UP/OOWN
of manu ul/au to moc le , presel Illelllory is reeall ed , b.uid swirching
ancl
preset
scan.
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