— 12 —
— 13 —
— 14 —
4-4. IC PIN FUNCTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
I/O
O
O
O
O
–
O
O
O
O
O
I
–
I
I
I
O
O
I
O
–
–
O
I
I
–
–
I
O
–
–
–
–
–
O
O
O
–
O
O
O
O
O
O
O
–
O
O
O
O
O
Description
Serial data output terminal (Not used: open)
Chip selection output to EEPROM (Not used: open)
Band switching output “H”: TV (4 to 12 channels), “L”: FM/TV (1 to 3 channels)/AM (Not used: open)
Audio mute signal output
Not used (Ground)
Power ON/OFF control output
Key strobe signal output. *1
Key strobe signal output. *1
Key strobe signal output. *1
Key strobe signal output. *1
Key return signal input. *1
Not used (Ground)
Key return signal input. *1
Key return signal input. *1
Key return signal input. *1
Meter drive signal output (Not used: ground)
TV mode control signal output (Not used: ground)
Low power voltage detection input (Not used: ground)
Band switching signal output “H”: AM, “L”: FM/TV (1 to 3 channels)
Ground (Ground)
Ground (Ground)
PLL error signal output to PLL low-pass filter (Q401, 402)
VCO input from FM/TV (1 to 3 channels)/AM local oscillator
VCO input from TV (4 to 12 channels) local oscillator (Not used: open)
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Power supply input (3 V)
Power supply input (3 V)
System clock output (75 kHz)
System clock input (75 kHz)
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Common signal output to LCD
Common signal output to LCD
Common signal output to LCD
Not used (Ground)
Common signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Not used (Ground)
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Pin Name
DATA OUT
EEPROM CS
TV 4-12CH
MUTE
NC
POWER
KS0
KS1
KS2
KS3
KR0
NC
KR1
KR2
KR3
POC0
POC1
V DET2
BAND
GND
GND
EO
VCOL
VCOH
REG0
VDD
VDD
X OUT
X IN
REG 1
REG LCD0
CAP LCD0
CAP2 LCD1
REG LCD1
COM0
COM1
COM2
NC
COM3
LCD0
LCD1
LCD2
LCD3
LCD4
NC
LCD5
LCD6
LCD7
LCD8
LCD9
• IC506 µPD17073GB-921-9EU (System Control, LCD Drive)
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
I/O
O
O
O
–
O
O
I
I
–
O
O
–
–
I
Description
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Not used (Open)
Segment signal output to LCD
Segment signal output to LCD
Low power voltage detection input. “L”: 1.9 V or less (Entering the clock mode)
Hold switch (S401) input detection terminal “L”: hold
Not used (Open)
Beep sound signal output
Noise filter circuit control signal output
Not used (Open)
Detection input (High level)
2 band/3 band detection input
Pin Name
LCD10
LCD11
LCD12
NC
LCD13
LCD14
VDET1
HOLD
NC
BEEP
NOISE CUT
LCD STB
CLK
DATA IN
• IC BLOCK DIAGRAMS
IC503 S-80819ANNP
IC505 S-80821ANNP
3
1
2
NC
OUT
VDD
VREF
+
–
4
Vss
IC201 CXA1111N
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
FM.IF
DISCRI
TUNING
METER
RIPPLE
FILTER
AM.IF
DET.AGC
BAND SIGNAL
OUTPUT CIRCUIT
REGULATOR
FM.FE
AM.FE
BAND
AM IF
FM IF
TUNE
EARTH
IF
AFCW
AFCJ
DET
FILTER
VCC
MUTE
MIX OUT
EARTH
FM IN
NC
AM RF
FM RF
REG
FM OSC
AFC
AM OSC
DISCRI
EARTH
IC401 CXA1522N
IC301 LA3335M
FF 0º
1
2
3
4
5
6
7
8
9
10
FF 1/2
FF 90º
V.C.O
VCO STOP
SYNC
DET
STEREO
SWITCH
PHASE
COMPALATE
LAMP
TRIGGER
DECODER
IN
FILTER
VCC
VCO
NC
GND
STLED
M/ST
L
R
VOL
REG
IN2
NC
NC
NF2
GND2
P-GND2
OUT
RIPPLE
IN1
REG
VOL
NF1
GND1
P-GND1
OUT1
PRE+POWER 1
PRE+POWER 2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
KR0
(
!¡
pin)
KR1
(
!£
pin)
KR2
(
!¢
pin)
KR3
(
!∞
pin)
KS0(
7
pin)
S502
1
S503
4
S504
2
S505
3
KS1(
8
pin)
S506
POWER
S507
NOISE CUT
–––––
S508
SETTING
KS2(
9
pin)
S509-1
ENT/BAND
S509-2
(JOG SW–)
–––––
S509-3
(JOG SW+)
KS3(
0
pin)
S510
5
–––––
S511
6
S512
7
*1
Key Matrix
