Sharp SC-7700CDH - Function Table of IC

SC-7700CDH
FUNCTION
TABLE
OF
IC
RH-IX131 1AFZZ
Output
utput : :
Outpu Here is produced the segment sig
nal to be li :
Guiput
applied
to
LCD
panel
Output
Output F ,
P Here is produced the common sig-
it pli lL
Output nai to be applied to LCD pane
_ Power supply of 5V + 10%.
Input
FM
local
oscillation
signal
is
here
applied. When AM pin is selected,
this
pin
automatically
goes
into
Pult Down mode.
Input.
|
AM
local
oscillation
signal
is
here
applied.
When
FM
pin
is
selected,
this
pin
automatically
goes
into
Pull-Down mode.
_ Ground pin
Output
|
PLL
error
signal
is
here
produced.
Output
|
The
signals
available
at
pins
EO1
and
EO2
have
the
same
waveform.
Input
Chip
enable
signal
At
High
level:
Normal
operation
At
Low
level
Back-up
operation
(to
protect memory contents)
Stop of PLL function Prohibition of
LCD display output.
No connection
4.5 MHz crystal oscillator is here
connected.
Output)
|
Here
is
produced
the
signal
to
en-
able
switching
of
reception
bands.
Output
LS1
LSO
Band
High
High
FM
Monaural
High
Low
FM
Stereo
Low
High
MW
Low
Low
LW
Output
|
Here
is
produced
the
muting
signal
to
cut
possible
noises
caused
when
PLL
loop
is
unlocked.
Output
|
Return
signal
from
the
key
matrix
is
here
applied.
input
Input
Return
signal
from
the
key
matrix
is
here applied.
input
Input
Output
Output | | Here ts produced the signal which
makes a signa! source for the key
Output | | matrix.
Output
Output
Output
|
Here
is
produced
the
digit
signal,
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
41. YING TION —-——-—-- - ---f
Here is produced the digit signal.
IF frequency(10,7 MHz) of FM band
is here applied.
In auto scan search mode, the pre-
sence of a broadcast station is de-
tected
by
counting
of
IF
frequency.
Power supply of 5V + 10%
IF frequency (450 kHz) of AM band
is here appiied.
In auto scan search mode, the pre-
sence
of
a
broadcast
station
is
de-
tected
by
counting
of
!F
frequency.
To
be
connected
to
ground
pin
of
LCD panel.
Here is produced the segment sig-
nal to be applied to. LCD panel.