Sony ICF-SC1PC, Service Manual, Page: 15 / 35

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Pin No. Pin name I/O Description
1 COMP-W I WFM S-curve voltage input (A/D input).
2 BATT I Low battery voltage detection input (A/D input).
3 – 7 KS0 – 4 O Key matrix output.
8 AVDD – Power supply for A/D converter.
9 AVREF – Power supply for A/D reference.
10 AC-DET I External power supply detect terminal.
11 LED O LED drive. “H” : Lighting
12 VSS – Ground.
13 TEST I Test mode terminal. “H” : Test mode
14 LCD I “H” : Normal. (LCD display ON = H during PC operaion)
15 BEEP O Beep signal output.
16 SCAN O Scan signal output. “H” : Scan run
17 DUB – Not used (Open).
18 WFM O WFM mode select. “H” : WFM mode
19 D/A 0 O D/A output bit 0 for minute step.
20 D/A 1 O D/A output bit 1 for minute step.
21 STANDBY O Standby signal output. “H” : RS232C interface OFF
22 MUTE O Mute signal output. “H” : Mute ON
23 – 25 COM0 – 2 O LCD common output.
26 COM3 – Not used (Open).
27 BIAS – LCD bias terminal.
28 – 30 VLC0 – 2 – LCD bias terminal.
31 VSS – Ground.
32 – 62 S0 – 30 O LCD segment output.
63 – Not used (Open).
64 AM O AM mode output. “H” : AM mode
65 NFM O NFM mode output. “H” : NFM mode
66 IF 1 O IF selection output.
67 RF O RF selection output.
68 MAIN O Main power supply ON/OFF control.
69 FILTER O Serial latch output for filter selection.
70 PLL O Serial latch output for PLL selection.
71 ROM O Clock output for EEPROM.
72 DO I Serial data input from EEPROM.
73 DI O Serial data output to EEPROM.
74 CLK O Serial clock output.
75 RXD I RXD input from RS232C interface.
76 TXD O TXD output to RS232C interface.
77 CTS O CTS output to RS232C interface.
78 IC (GND) – Ground.
79 XM2 Main clock oscillator (4.194304MHz).
80 XM1 Main clock oscillator (4.194304MHz).
81 VDD – Power supply (+4.0V).
82 XS2 Sub clock oscillator (32.768kHz).
83 XS1 Sub clock oscillator (32.768kHz).
84 RESET I System reset terminal.
85 OFF-DET I Low power detection OFF input. “L” : OFF
SECTION 5
DIAGRAMS
5-1. EXPLANATION OF IC TERMINALS
IC604
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PD78064BGC (SYSTEM CONTROL)