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SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
• IC801 µPD17705GC-537-3B9 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
SIRCS
I
SIRCS input (A/D)
2
IN-SW
I
CD mechanism position detection
3
D-SW
I
CD mechanism position detection
4
SELF-SW
I
CD mechanism position detection
5
L-SW
I
LIMIT switch
6
LM-EJ
O
Loading motor control (Eject direction)
7
LM-LOD
O
Loading motor control (Loading direction)
8
AMP/ANT-ON
O
Power control for amplifier.
9
MONO
O
Force MONO output
10
SD
I
SD signal input
11
BAND-SW
I
Initialize switch input terminal
12
AREA1-SW
I
Initialize switch input terminal
13
AREA2-SW
I
Initialize switch input terminal
14, 15
RE1, 2
I
Rotary encoder input 1, 2
16
SEEK
O
SEEK output
17
CD-ON
I/O
Servo drive power
18
FM-ON
I/O
FM select output
19
TU-ON
I/O
AM select output
20
NC
—
Not used.
21
GND3
—
Ground
22
KEYIN3
I
Not used (Connect to ground)
23, 24
KEYIN2, 1
I
A/D key input 2, 1
25
ROT-IN
I
Rotary commander input
26
S-METER
I
FM and AM common signal meter A/D conversion input
27
TEST-SW
I
TEST mode select input
28
AM-IFC
I
AM center frequency input
29
FM-IFC
I
FM center frequency input
30
VDD2
—
Power supply (+5 V)
31
VCOH-FM
I
Local oscillation frequency input (FM)
32
VCOL-AM
I
Local oscillation frequency input (AM)
33
GND2
—
Ground
34
NC
—
Not used.
35
EO1-PDOUT
O
Error out output
36
TESTO
—
Connect to ground
37
AM-ON(TU-ON)
O
AM power output (AM select)
38
FM-ON(FM/AM)
O
FM power output (FM select)
39
LCL/DX
O
LOCAL/DX select (“H” : LOCAL, “L” : DX)
40
BEEP
O
BEEP output
41
ACC-IN
I
Accessory input
42
SCOR
I
SUBQ data read request
43
MUTE
O
System mute output
44
AMP-MUTE
O
Power amplifier mute output
45
TEL-MUTE
O
Telephone mute output
46
NC
—
Fixed at “H” in this set.
47
VOL-CE
O
Electric volume chip select
48
VOL-CLK
O
Electric volume serial clock
49
VOL-DATA
O
Electric volume serial data
50
EMPHO
O
De-emphasis control output
51
PW-ON
O
System power control
52
MD-ON
O
Loading motor power
53
CD-ON
O
Servo drive power
