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