Read Sony ICF-C630 (serv.man2) Service Manual online
15
ICF-C630
5-6. IC PIN DESCRIPTION
• IC105 µPD789488GC-A23-8BT (SYSTEM CONTROL, LCD DRIVER)
Pin No.
Pin Name
I/O
Pin Description
1
CAPH
—
Connect to capacitor (H)
2
CAPL
—
Connect to capacitor (L)
3 to 5
VLC2 to VLC0
O
LCD drive bias voltage output 2 to 0
6 to 9
COM0 to COM3
O
LCD drive common data output 0 to 3
10 to 34
S0 to S24
O
LCD drive segment data output 0 to 24
35 to 37
P85 to P87
O
Not used. (Open)
38
AVDD
—
Power supply pin (+3.3 V)
39
INIT
I
Destination setting pin (Fixed at L)
40
P66
I
Destination setting pin (Fixed at L)
41 to 46
P65 to P60
I
Not used. (Fixed at L)
47
AVSS
—
Ground
48
VDET1
I
Down voltage detection (+2.3 V)
49
VDET2
I
Down voltage detection (+2.1 V)
50
VDET3
I
Down voltage detection (+1.9 V)
51
BUZZER
O
Buzzer output
52
P30
O
Not used. (Open)
53 to 55
P25 to P23
O
Key source output 2 to 0
56 to 58
KS2 to KS0
O
Not used. (Open)
59, 60
P11, P10
O
Not used. (Open)
61 to 64
KR3 to KR0
I
Key return input 3 to 0
65
BAND
O
Band select output (L: FM, H: AM)
66
MUTING
O
Mute output
67
POWER
O
Power output
68
AC/DC
I
AC/DC mode input (L: AC, H: DC)
69
IC0
—
Not used. (Fixed at L)
70
XT1
I
Sub clock input (32.768 kHz)
71
XT2
O
Sub clock output (32.768 kHz)
72
VDD
—
Power supply pin (+2.5 V)
73
VSS
—
Ground
74
X1
I
Main clock input (4.19 MHz)
75
X2
O
Main clock output (4.19 MHz)
76
RESET
I
Reset input
77
P53
O
Not used. (Open)
78 to 80
LIGHT1 to LIGHT3
O
LCD backlight dimmer control output 1 to 3
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