Diagrams; Explanation Of Ic Terminals - Sony ICF-SC1 Service Manual

5-1. EXPLANATION OF IC TERMINALS

IC604 µ PD78064BGC (SYSTEM CONTROL)
Pin No. Pin name
1 COMP-W
2 BATT
3 – 7 KS0 – 4
8 AVDD
9 AVREF
10 AC-DET
11 LED
12 VSS
13 TEST
14 LCD
15 BEEP
16 SCAN
17 DUB
18 WFM
19 D/A 0
20 D/A 1
21 STANDBY
22 MUTE
23 – 25 COM0 – 2
26 COM3
27 BIAS
28 – 30 VLC0 – 2
31 VSS
32 – 62 S0 – 30
63
64 AM
65 NFM
66 IF 1
67 RF
68 MAIN
69 FILTER
70 PLL
71 ROM
72 DO
73 DI
74 CLK
75 RXD
76 TXD
77 CTS
78 IC (GND)
79 XM2
80 XM1
81 VDD
82 XS2
83 XS1
84 RESET
85 OFF-DET
SECTION 5

DIAGRAMS

I/O
I WFM S-curve voltage input (A/D input).
I Low battery voltage detection input (A/D input).
O Key matrix output.
– Power supply for A/D converter.
– Power supply for A/D reference.
I External power supply detect terminal.
O LED drive. "H" : Lighting
– Ground.
I Test mode terminal.
I "H" : Normal. (LCD display ON = H during PC operaion)
O Beep signal output.
O Scan signal output.
– Not used (Open).
O WFM mode select.
O D/A output bit 0 for minute step.
O D/A output bit 1 for minute step.
O Standby signal output.
O Mute signal output.
O LCD common output.
– Not used (Open).
– LCD bias terminal.
– LCD bias terminal.
– Ground.
O LCD segment output.
– Not used (Open).
O AM mode output. "H" : AM mode
O NFM mode output.
O IF selection output.
O RF selection output.
O Main power supply ON/OFF control.
O Serial latch output for filter selection.
O Serial latch output for PLL selection.
O Clock output for EEPROM.
I Serial data input from EEPROM.
O Serial data output to EEPROM.
O Serial clock output.
I RXD input from RS232C interface.
O TXD output to RS232C interface.
O CTS output to RS232C interface.
– Ground.
Main clock oscillator (4.194304MHz).
Main clock oscillator (4.194304MHz).
– Power supply (+4.0V).
Sub clock oscillator (32.768kHz).
Sub clock oscillator (32.768kHz).
I System reset terminal.
I Low power detection OFF input.
– 15 –
Description
"H" : Test mode
"H" : Scan run
"H" : WFM mode
"H" : RS232C interface OFF
"H" : Mute ON
"H" : NFM mode
"L" : OFF