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4-1. IC PIN DESCRIPTION

• IC801 µPD17705GC-526-3B9 (SYSTEM CONTROL)
Pin No.
Pin Name
1
SIRCS
2
IN-SW
3
D-SW
4
SELF-SW
5
L-SW
6
LM-EJ
7
LM-LOD
8
ANT-ON
9
MONO
10
SD
11
BAND-SW
12
AREA1-SW
13
AREA2-SW
14, 15
RE1, 2
16
SEEK
17 – 20
NC
21
GND3
22 – 24
KEYIN3 – 1
25
ROT-IN
26
S-METER
27
TEST-SW
28
AM-IFC
29
FM-IFC
30
VDD2
31
VCOH-FM
32
VCOL-AM
33
GND2
34
NC
35
EO1-PDOUT
36
TESTO
37
AM-ON(TU-ON)
38
FM-ON(FM/AM)
39
LCL/DX
40
BEEP
41
ACC-IN
42
SCOR
43
MUTE
44
AMP-MUTE
45
TEL-MUTE
46
NC
47
VOL-CE
48
VOL-CLK
49
VOL-DATA
50
EMPHO
51
PW-ON
52
MD-ON
53
CD-ON
54
ILL-ON
55, 56
MOD1, 2
57
NC
58
LCD-CE
SECTION 4

DIAGRAMS

I/O
I
SIRCS input (A/D)
I
CD mechanism position detection
I
CD mechanism position detection
I
CD mechanism position detection
I
LIMIT switch
O
Loading motor control (Eject direction)
O
Loading motor control (Loading direction)
O
Power control for amplifier.
O
Force MONO output (Not used.)
I
SD signal input
I
Band plan setting of general area.
I
Destination select 1
I
Destination select 2
I
Rotary encoder input 1, 2
O
SEEK output
Not used.
Ground
I
A/D key input 3 – 1
I
Rotary commander input
I
FM and MW/LW common signal meter A/D conversion input.
I
TEST mode select input
I
MW/LW center frequency input
I
FM center frequency input
Power supply (+5 V)
I
Local oscillation frequency input (FM)
I
Local oscillation frequency input (MW/LW)
Ground
Not used.
O
Error out output
Fixed at "L".
O
MW/LW power output (MW/LW select)
O
FM power output (FM select)
O
LOCAL/DX select ("H" : LOCAL, "L" : DX)
O
BEEP output
I
Accessory input
I
SUBQ data read request
O
System mute output
O
Power amplifier mute output
O
Telephone mute output
Not used.
O
Electric volume chip select
O
Electric volume serial clock
O
Electric volume serial data
O
De-emphasis control output
O
System power control
O
Loading motor power
O
Servo drive power
O
Illumination output
O
Bus boost control 1, 2
Not used.
O
LCD drive chip select output
– 19 –
Pin Description

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