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C BLOCK DIAGRAM
IC240 HD404728A (4 Bit Micro Processor)
A* :initial
B* :Active Mode
C* :Back Up
—
3
5
6
7
8
9
-ii-
T —
12
—
13
—
14
—
15
—
16
—
17
18
-
19
-ii
T —
22
—
23
24
—
25
—
29
—
Pin
name
Description
High: ,Low:
A*
B*
c*
No
Pin name
Description
High: ,Low:
A*
B*
c'
SEG.0UT5
FL
segment
output
(SEG.0UT5)
30 STEREO IND
FM.STEREO resieved display input
L
SEG.0UT4
FL segment
output
(SEG.0UT4)
STEREO TIME+L
level
SEG.0UT3
FL segment
output
(SEG.0UT3)
31
TU MUTE
TU Muting
output
Muting
H
H
Hi-
SEG.0UT2
FL segment
output
(SEG.0UT2)
ON/OFF+H/L
Imp
SEG.OUT1
FL segment
output
(SEG.OUT1)
32
Vcc
+ Power source
)IGIT OUT1
FL Digit
output
(DIG.OUT1)
33
SCK
Clock
signal
output
for data
)IGIT 0UT2
FL Digit output
(DIG.0UT2)
output to PLL IC
34
$1
)IGIT 0UT3
FL Digit output
(DIG.0UT3)
35
so
)IGIT 0UT4
FL Digit output
(DIG.0UT4)
Data output to the PLL IC
)IGIT 0UT5
FL Digit output
(DIG.0UT5)
36
CE
Chip enable signal output to the
PLL lC
)IGIT 0UT6
FL Digit output
(DIG.0UT6)
CD FADE
CD Control output
Norm: L,
FUNCT4
FUNCTION SW signal output
L
H
L
37
CONTIOSE
CD FADE IN-FADE OUT: H,
TUNER; ,Hi PULSE
PW OFF CHECK Key" l": Clock
L
H
L
FUNCTION SW signal output
CHECK
FUNCT3
L
H
L
output
for adjustment
AUX; ,Hi PULSE
38
KEY OUT1
Key Matrix output signal 1
FUNCT2
FUNCTION SW signal output
L
H
L
39
KEY 0UT2
Key Matrix
output signal 2
VCR;,Hi PULSE
40
KEY 0UT3
Key Matrix output signal 3
FUNCT1
FUNCTION SW signal output
L
H
L
41
KEY 0UT4
Key Matrix output signal 4
DAT; ,Hi PULSE
42
KEY OUTS
Key Matrix output signal 5
20dB MUTE
-20dB Muting
output,
ON/OFF+UH
L
H
L
43
KEY IN1
Key Matrix
input signal 1
KEY IN2
Key Matrix
input signal 1
~ MUTE
coMuteing
output, ONIOFF-MJH
L
L
imp
45
KEY IN3
Key Matrix
input signal 1
POWER SW
POWER SW key input, Nrm.+H
L
46
KEY IN4
Key Matrix
input signal 1
Vdisp
power source for display
47
RESET
(RESET)
VOLUP
Vol Up signal output, Norm .+L
L
H
L
48
0SC2
(X'tal connect)
VOLDOWN
Vol Down signal output Norm.+L
L
H
L
49
Oscl
(X'tal connect)
VOL indicator
LED output,
50
GND
GND
VOLIND
Norm .+H, VOL mode+flushing
H
H
L
51
CL1
1
CD CONT
CD Control output, Timer;CD
11111!
52
L
H
L
~a
CL2
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I
I
&art+H
Norm
-L
level
TFCT
TAPE Control output, Timer and
POWER REIAY Control output
TAPE CONT
TAPE PLAY+L, TAPE REC+H,
'i-
UH
Hi-
54
POWER RY
Relay OFF:L Relay ON:H
L
H
'i-
imp
imp
imp
Norm .-+Hi Impedance
55
SEG.OUT15
FL segment
output(SEG.OUT15)
FM compulison
monoral
output,
FM MONO
Stereo Auto.+L,
Compulsion
56
SEG.0UT14
FL segment
output (SEG.0UT14)
L
H
L
Mono.+H
57
SEG.0UT13
FL segment
output(SEG.OUT13)
TUNED5D
TUNED/SD
signal input
L
58
SEG.0UT12
FL segment
output(SEG.OUT12)
L
59
SEG.OUT11
FL segment
output(SEG.OUT11)
IR
Remote controller
recieved signal
60
SEG.OUTIO
FL segment
output (SEG.OUT1 O)
Inhibit AC PW detected, AC
61
SEG.0UT9
FL segment
output (SEG.0UT9)
INH
ON+, AC OFF-+L
L
62
SEG.0UT8
FL segment
output (SEG.0UT8)
63
SEG.0UT7
FL segment
output (SEG.0UT7)
,..
,...,... ...
,., .
.
..
:.,'., ..
",..:. ,,.
. . ...
...' :. .,.
.
! 64 I SEG.0UT6
! FL seament
output (SEG.0UT6)
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