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IC DESCRIPTION
iC, LC7230 — 8239
é
see
A 4,5MHz crystal oscillator is connected to these pins.
80
xX
OUT
3
eda
Test terminal connected by GND.
793
TESTI
35~32
KIO~KI3
4
KI4
I
Key inputs.
3
KI5
|
5
REMOCON
a
Remote control serial data input.
Power on/off control input.
Controls
POW CONT at pin 12.
POW
SW
Power is turned on and off every time "H" is input.
(0) is not used (H, U, C)
Output switched by the mode switch.
"L" in the FM AUTO mode and when AM "0" is displayed.
Power on/off control output.
The output is switched between "H" and "L" every time pin 6 (POW SW) goes "H".
Outputs a muting signal when a key is operated.
Active "L".
Control signal outputs for the electronic volume IC, TC-9154AP.
When power is turned on, the volume is restored to the position where it was
set immediately before power was turned off.
Function switching outputs.
* Only for the E, K, Z specifications
FM
MONO
a add
Las)
fe) a
a re) zZ 4
fe)
DATA
STROBE
FUNCTIONA
AUX
FUNCTION
B
FUNCTION
C
When power
is turned
on,
the last function
immediately
before
power
was
turned
off is restored.
Outputs data to display
the function
and volume.
The LEDs indicating the function and volume are driven by shift register IC702,
TC74HC164AP,
T . ~T3
2
Key scan outputs.
1
31,73 (ee ae
Power supply pins.
Outputs a clock signal to the IC, TC74HC164AP
(shift register) which drives
the function and volume LEDs.
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