Read Sony ICF-CD830 / ICF-CD830L Service Manual online
15
ICF-CD830/CD830L
2-11.
IC PIN FUNCTION DESCRIPTION
• IC401
µPD789477GC-A08-8BT (SYSTEM CONTROL/LCD DRIVER)
Pin No.
1, 2
3 to 5
6 to 9
10 to 25
26, 27
28, 29
30 to 35
36, 37
38
39
40 to 46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66 to 68
69
70
71
72
73
74
75
76
77
78
79
80
I/O
–
–
O
O
I
–
I
–
–
–
I
–
I
I
I
I
O
O
O
O
I
–
O
O
O
O
O
O
O
I
–
O
I
O
–
–
I
O
I
–
O
O
O
Pin Name
NC
VLC2-0
COM0-3
SEG0-15
VERSION1-0
NC
KEY5-0
NC
AVDD
GND
KEY6-12
AVSS
DRF
AC IN
WRQ
FESQ
BUZZER
CE(C LAT)
DI(C DATA)
CL(C CLK)
DO(DATA IN)
NC
RES(XRST)
RST
CD ON
BEEP MUT
AMUT
POWER ON
RADIO ON
CD OPEN
NC
IC
XT1
XT2
VDD0
VSS0
X1
X2
RESET
NC
CD LED
RADIO LED
BUZZER LED
Description
Not used
LCD drive power supply
LCD drive common signal output
LCD drive segment signal output
Initialization input(destination settting)
Not used (connected to ground)
Key return signal input
Not used (pull-down)
Analog power supply
Ground
Key return signal input
Analog ground
CD DRF sinal input
Power failure detect signal input(L=power failure)
CD command data input
CD frame SYNC input
Buzzer signal output
CD latch signal output
CD data signal output
CD clock signal output
CD data signal input
Not used (pull-down)
CD reset signal output (to DSP IC)
CD reset signal output (to BTL IC)
CD power control signal output (L=ON)
Beep sound muting control signal output (H=ON)
Audio circuit muting control signal output (L=ON)
Standby control signal output for the power amplifier (H=ON)
Power control signal output for the radio circuit (L=ON)
CD lid open detect signal input (L=close,H=open)
Not used (pull-down)
Not used (connected to ground)
Sub system clock input (32.768kHz)
Sub system clock output
System power supply
Ground
Main system clock input (4.19MHz)
Main system clock output
System reset signal input
Not used
CD LED control signal output
RADIO LED control signal output
BUZZER LED control signal output
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