Sony CDX-GT81UW / CDX-GT860U Service Manual ▷ View online
37
CDX-GT81UW/GT860U
• IC PIN DESCRIPTION
IC303 M30626FHPA11GP (SYSTEM CONTROL) (MAIN BOARD (3/4))
Pin No.
Pin Name
I/O
Pin Description
1
DST SEL0
I
Destination setting pin 0
2
FSW IN
I
D/D converter oscillator frequency count control signal input
3
UNI SO
O
SONY bus serial data signal output
4
UNI SI
I
SONY bus serial data signal input
5
UNI CKO
O
SONY bus serial clock signal output
6
BYTE
I
Connect to ground. (Fixed to “L”.)
7
CNVSS
I
Port for frash write H (Write switch) Normally operation: “L”
8
XCIN
I
Sub clock signal input (32.768 kHz)
9
XCOUT
O
Sub clock signal output (32.768 kHz)
10
RESET
I
Reset signal input
11
XOUT
O
Main clock signal output (6 MHz)
12
VSS
—
Ground pin
13
XIN
I
Main clock signal input (6 MHz)
14
VCC1
—
Power supply pin (+3.3 V)
15
NMI
I
Non-maskable interruption signal input Fixed to “H” for external pull-up resistor.
16
CDM ON
I
CD mechanism deck power supply control request signal input
17
DAVN
I
Not used in this set. (Open)
RDS (Radio data system) data block synchronized detect
18
TUNER ATT IN
I
Not used in this set. (Open) Tuner mute zero cross detect signal input
19
NS MASK
O
Not used in this set. (Open) Noise mask signal output
20
BEEP
O
Beep signal output
21
TUNER ATT
O
Tuner mute signal output
22
EESIO (TU)
I/O
Tuner EEPROM serial data signal input/output
23
EECKO (TU)
O
Tuner EEPROM serial clock signal output
24
NC
O
Not used in this set. (Open)
25
ATT
O
Mute signal output
26
NC
O
Not used in this set. (Open)
27
I2C CKO
O
I2C bus serial clock signal output
28
I2C SIO
I/O
I2C bus serial data signal input/output
29
TX
O
Flash write data signal output
30
RX
I
Flash write data signal input
31
NC
O
Not used in this set. (Open)
32
NC
O
Not used in this set. (Open)
33
CD TX
O
CD mechanism deck communication data signal output
34
CD RX
I
CD mechanism deck communication data signal input
35
E MUTE
O
Electronic volume mute signal output
36
E DATA
O
Spectrum analyzer serial data signal output
37
E CLK
O
Spectrum analyzer serial clock signal output
38
NC
O
Not used in this set. (Open)
39
HOLD
I
External data bus (HOLD) signal input
Fixed to “L” for external pull-down resistor.
40
AMP DIAG
I
Amplifier self-diagnostic test function signal input
41
AMP STB
O
Amplifier standby signal output
42, 43
NC
O
Not used in this set. (Open)
44
WRI/WR
I
External data bus (WRI/WR) signal input
Fixed to “H” for external pull-up resistor.
45
WAKE UP OUT
O
CD mechanism wake up signal output
38
CDX-GT81UW/GT860U
Pin No.
Pin Name
I/O
Pin Description
46
OPEN REQ
I
CD mechanism open request signal input
47
EJECT OK
O
CD mechanism eject control signal output
48
P MONITOR
O
P-SNSR process monitor signal output
49
CD ON
I
CD servo power supply on/off control signal input
50
Z DET
I
CD zero mute signal input
51
ILL IN
I
Illumination detect signal input
52
ACC IN
I
Accessory detect signal input
53
TEL ATT
I
Telephone mute detect signal input
54
TEST IN
I
Test mode detect signal input
55
RC IN1
I
Rotary commander shift key signal input
56
SYSRESET
O
System reset signal output
57
BUS ON
O
Bus on signal output
58
FSW OUT
O
D/D converter oscillator frequency change signal output
59
AAC SEL
I
AAC select signal input “H”: AAC off
60
VCC2
—
Power supply pin (+3.3 V)
61
NC
O
Not used in this set. (Open)
62
VSS
—
Ground pin
63
MOTOR ON
O
Front panel motor drive power supply switch signal output
64
MOT+
O
Front panel open/close control output (Motor open)
65
MOT–
O
Front panel open/close control output (Motor close)
66
CLOSE SW
I
Front panel close detect signal input
67
OPEN SW
I
Front panel open detect signal input
68
P SNSR
I
Drive mechanism gear rotary information signal input
69
USB ON
O
USB power supply oscillator on/off signal output
70
DST SEL1
I
Destination setting pin 1
71
DST SEL2
I
Destination setting pin 2
72
FL ON
O
Vacuum fluorescent displays power supply on/off signal output
73
BU IN
I
Backup power supply detect signal input
74
FLD ON
O
Vacuum fluorescent displays driver power supply on/off signal output
75
HS EN
O
USB high side switch control signal output
76
HS OC
I
USB high side switch overcurrent detection signal input
77
RE 1
I
Rotary encoder signal input 1
78
RE 0
I
Rotary encoder signal input 0
79
FP IDET
I
Front panel overcurrent detection signal input
80
TEMP TR
I
Temperature detect signal input
81
NC
O
Not used in this set. (Open)
82
QUALITY
I
Tuner noise detect signal input
83
VSM
I
S meter voltage signal input
84
KEY IN0
I
Key signal input 0
85
SP IN
I
Spectrum analyzer signal input from electronic volume
86
RC IN0
I
Rotary commander signal input 0
87
KEY ACK2
I
Rotary commander acknowledge signal input
88
KEY ACK0
I
Key acknowledge signal input
89
NC
O
Not used in this set. (Open)
90
DISP RESET
O
Reset signal output to display IC
91
NOSE SW
I
Front panel detect signal input
92
NC
O
Not used in this set. (Open)
93
DISP CE
O
Chip enable signal output for display IC
94
AVSS
—
Ground pin
95
DOOR IND
O
Sub panel LED power supply control signal output
39
CDX-GT81UW/GT860U
Pin No.
Pin Name
I/O
Pin Description
96
VREF
—
Reference voltage pin for A/D converter
97
AVCC
—
Power supply pin (+3.3 V)
98
DISP SI/RX
I
Communication signal input from display IC
99
DISP SO/TX
O
Communication signal output to display IC
100
DISP CKO
O
Communication clock signal output to display IC
40
CDX-GT81UW/GT860U
IC901 M30876FJBA01GP (DISPLAY CONTROL) (DISPLAY BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
SYS CE
I
Main chip enable signal input
2
NC
O
Not used in this set. (Open)
3
FL DAT3
O
Vacuum fluorescent displays serial data signal output 3
4
NC
O
Not used in this set. (Open)
5
FL CLK IN
I
Vacuum fluorescent displays serial clock signal input
6
BYTE
I
Connect to ground. (Fixed to “L”.)
7
CNVSS
I
Port for flash write H (write switch) Normally operation: “L”
8, 9
NC
O
Not used in this set. (Open)
10
RESET
I
Reset signal input
11
XOUT
O
Main clock signal output (6.75 MHz)
12
VSS
—
Ground pin
13
XIN
I
Main clock signal input (6.75 MHz)
14
VCC1
—
Power supply pin (+3.3 V)
15
NMI
I
Non-maskable interruption signal input
Fixed to “H” for external pull-up resistor.
16 to 18
NC
O
Not used in this set. (Open)
19
GCP TA4 IN
I
Vacuum fluorescent displays GCP TA4 signal input
20, 21
NC
O
Not used in this set. (Open)
22
BK TA3 OUT
O
Vacuum fluorescent displays BK TA3 signal output
23
NC
O
Not used in this set. (Open)
24
LAT TA2 OUT
O
Vacuum fluorescent displays latch TA2 signal output
25 to 27
NC
O
Not used in this set. (Open)
28
GCP TA0 OUT
O
Vacuum fluorescent displays GCP TA0 signal output
29
SYS SO
O
Main serial data signal output
30
SYS SI
I
Main serial data signal input
31
SYS CLK
I
Main serial clock signal input
32
NC
O
Not used in this set. (Open)
33
FL DAT1
O
Vacuum fluorescent displays serial data signal output 1
34
NC
O
Not used in this set. (Open)
35
FL CLK
I
Vacuum fluorescent displays serial clock signal input
36 to 38
NC
O
Not used in this set. (Open)
39
HOLD
I
External data bus (Hold) signal input
Fixed to “L” for external pull-down resistor.
40 to 43
NC
O
Not used in this set. (Open)
44
WRI/WR
I
External data bus (WRI/WR) signal input
Fixed to “H” for external pull-up resistor.
45 to 59
NC
O
Not used in this set. (Open)
60
VCC2
—
Power supply pin (+3.3 V)
61
NC
O
Not used in this set. (Open)
62
VSS
—
Ground pin
63 to 70
NC
O
Not used in this set. (Open)
71
PLUG IN
I
AUX plug detect signal input
72 to 84
NC
O
Not used in this set. (Open)
85
KEY 1
I
Key signal input 1
86
KEY 2
I
Key signal input 2
87, 88
NC
O
Not used in this set. (Open)
89
SIRCS
I
SIRCS data signal input
90
NC
O
Not used in this set. (Open)
91
ILL BLUE
O
Illumination (blue) change control signal output
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