Read Sony CDX-1300 / CDX-3800 / CDX-3900 Service Manual online
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3-1. IC PIN DESCRIPTION
• IC600 µPD78005GC-133-8BT (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
MCLK
O
Microcomputer command clock signal output (data latch on rising)
2
MDATA
O
Microcomputer command data signal output
3
MLD
O
Microcomputer command load signal output
4
AVSS
—
Analog ground
5
DSTSEL0
I
Destination select setting input (Connect to ground in this set.)
6
DSTSEL1
I
9k/10k select setting input (“L”: 9 kHz step, “H”: 10 kHz step)
7
AVREF1
I
Analog reference voltage input
8
SUBQ
I
Sub code Q data input
9
—
—
Not used.
10
SQCK
O
Clock output for sub code Q register.
11
LCDCE
O
LCD driver serial chip enable output
12
LCDSO
O
LCD driver serial data output
13
LCDCKO
O
LCD driver serial clock output
14
ILLON
O
Illumination power control output
15
UNICKI
I
SONY-BUS serial interface clock input
16
UNISI
I
SONY-BUS serial interface data input
17
UNISO
O
SONY-BUS serial interface data output
18
UNICKO
O
SONY-BUS serial interface clock output
19
SBCK
O
Clock output for error correction result read-in.
20
BUSON
O
BUS ON control output
21
SYS RST
O
System reset control output
22
RST
O
DSP reset signal output (“L” active)
23
FOUT
O
Loading motor control output (Forward direction)
24
ROUT
O
Loading motor control output (Reverse direction)
25
CD-ON
O
CD power control output
26
PW-ON
O
System power control output
27
LIMSW
I
LIMIT switch input (“L” active)
28
FLAG
I
Data input for error correction result read-in.
29
SENS
I
SENS signal input
30
FLOCK
I
Focus servo pulling signal input (“L” active)
31
TLOCK
I
Tracking servo pulling signal input (“L” active)
32
STATE
I
Status signal input
33
VSS1
—
Ground
34
VIB.
I/O
Vibration lens input/output
35
CDM-ON
O
CD machanism power control output
36
AMPMUT
O
Power amplifier mute control output
37
A-MUT
O
Audio mute control output
38
AD-ON
O
Power control output for A/D conversion.
39
PW-SEL
O
Not used in this set.
40
NOSESW
I
Front panel attachment detection input
41
TEST
I
Test mode direct setting input
42
TELMUT
O
Not used in this set.
43
ACCIN
I
Accessory power supply voltage detection input
44
VOLCE
O
Electric volume serial chip enable output
45
VOLSO
O
Electric volume serial data output
46
BEEP
O
Beep output
47
TUNON
O
Tuner ON output
48
FMON
O
FM ON output
49
PLLCE
O
PLL chip enable output
50
VOLCKO
O
Electric volume serial clock output
51
PLLSO
O
PLL data output
SECTION 3
DIAGRAMS
Pin No.
Pin Name
I/O
Pin Description
52
PLLCKO
O
PLL clock output
53
PLLSI
I
PLL data input
54
AMON
O
AM ON output
55
—
—
Not used in this set.
56
FMST
I/O
ST-IND indication input/Forced Monaural output
57
SW4
I
Switch 4 input (“L” active)
58
SW3
I
Switch 3 input (“L” active)
59
SW1
I
Switch 1 input (“L” active)
60
RESET
I
System reset input
61
SIRCS
I
Remote commander input
62
KEYACK
I
Key input acknowledge
63
BUIN
I
Backup power supply detection input
64
BLKCK
I
Sub code block clock signal input (interruption)
65
SW2
I
Switch 2 input (“L” active)
66
FCLK
I
Latch input for error correction result read-in. (interruption)
67
VSS0
—
Ground
68
VDD1
—
Power supply pin (+5 V)
69
X2
—
Main system clock output (5 MHz)
70
X1
—
Main system clock input (5 MHz)
71
VPP
—
Internal connection
72
XT2
—
Sub system clock output (32.768 kHz)
73
XT1
—
Sub system clock input (32.768 kHz)
74
VDD0
—
Power supply pin (+5 V)
75
AVREF0
—
Analog reference voltage input
76
KEYIN0
I
Key input 0
77
KEYIN1
I
Key input 1
78
S-METER
I
AM/FM S-meter voltage detection input
79
SD-IN
I
Signal detector input
80
LCDINH
O
LCD blank indication control output
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