Ic Pin Description - Sony ICF-C630 Service Manual

5-6. IC PIN DESCRIPTION

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