CDX-GT72W/GT720/GT770
39
• IC Pin Function Description
MAIN BOARD IC303 M3062LFGPA10GP (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
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
fl
ash 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
RDS (Radio data system) data block synchronized detect signal input
Not used in this set. (Open)
18
TUNER ATT IN
I
Tuner mute zero cross detect signal input
19
NS MASK
O
Noise mask signal output Not used in this set. (Open)
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. (Open)
25
ATT
O
Mute signal output
26
NC
O
Not used. (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. (Open)
32
NC
O
Not used. (Open)
33
CD TX
O
CD
fl
ash write data signal output Not used in this set. (Open)
34
CD RX
I
CD
fl
ash write data signal input Not used in this set. (Open)
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. (Open)
39
HOLD
I
External data bus (HOLD) signal input Fixed to “L” for external pull-down resistor.
40
AMP DIAG
I
Ampli
fi
er self-diagnostic test function signal input
41
AMP STB
O
Ampli
fi
er standby signal output
42
NC
O
Not used. (Open)
43
NC
I
Not used.
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 Not used in this set. (Open)
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 “H”: ATT on
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
