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Ic Pin Function Description - Sony ICF-SW7600GR Service Manual

Fm stereo/sw/mw/lw pll synthesized receiver.
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ICF-SW7600GR
• IC BLOCK DIAGRAMS
IC201 CXA1376AS
IC202 LA3335M
8
6
10
9
7
SYNC
LAMP
DECODER
DET
TRIGGER
STEREO
SWITCH
FF 90º
FF 1/2
FF 0º
PHASE
V.C.O
VCO STOP
COMPALATE
1
2
3
4
5
IC203 CXA1522P
16
15
14
13
12
11
10
PRE+POWER 1
REG
VOL
PRE+POWER 2
1
2
3
4
5
6
7
Downloaded from
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IC204 LA5003M
8
7
6
5
TRIGGER
REFERENCE
CIRCUIT
REGULATOR
ERROR
AMP
3
1
2
9
8
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4-8. IC PIN FUNCTION DESCRIPTION

µPD17073GB-564-1A7 (DIGITAL TUNING SYSTEM CONTROL)
• IC302
Pin No.
Pin Name
I/O
1
LIGHT
O
Light control signal output
2
MUTING
O
Muting signal output
3
KS6
O
Key source signal output
4
KS5
O
Key source signal output
5
KS4
O
Key source signal output
6
KS3
O
Key source signal output
7
KS2
O
Key source signal output
8
KS1
O
Key source signal output
9
KS0
O
Key source signal output
10
KR3
I
Key return signal input
11
KR2
I
Key return signal input
12
KR1
I
Key return signal input
13
KR0
I
Key return signal input
14
HOLD
I
Key input protect switch signal input
15
POWER
O
Radio power control signal output
16
AM/FM
O
AM/FM select signal output
17
BAR/ROD
O
Bar/Rod antenna select signal output
18
GND
Ground
19
EO
O
Error signal output
20
VCOL
I
AM VCO (local oscillation) frequency input
21
VCOH
I
FM VCO (local oscillation) frequency input
22
REG PLL
O
Output of PLL voltage regulator
23
VDD
Power supply (+3V)
24
XOUT
O
Pin for connecting crystal resonator for system clock
25
XIN
I
Pin for connecting crystal resonator for system clock
26
REG OSC
O
Output of voltage regulator for oscillation circuit
4
27
REG LCD0
O
LCD drive voltage output
28
CAP LCD0
Pin for capacitor connection for LCD drive voltage
29
CAP LCD1
Pin for capacitor connection for LCD drive voltage
30
REG LCD1
O
LCD drive voltage output
31 - 34
COM0 - 3
O
LCD common signal output
35 - 49
LCD0 - 14
O
LCD segment signal output
50
CE
I
Chip select enable input
51
VDET
I
Low voltage detect signal input
52
BEEP
O
BEEP signal output
53
SD
I
Signal detector signal input
54
METER
I
Reception level signal input
55
SCK
O
Serial clock output for EEPROM
56
SI/SO
I/O
Serial data input or output for EEPROM
16
16
Description

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