Read Sony CDX-GT930UI / CDX-GT937UI / CDX-GT980UI Service Manual online
CDX-GT930UI/GT937UI/GT980UI
37
• IC Pin Function Description
MAIN BOARD IC303 R5F3640MDZ99FB (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
AEP, UK model: RDS (Radio data system) data block synchronized detect signal input
Except AEP, UK model: Not used in this set. (Pull down)
Except AEP, UK model: Not used in this set. (Pull down)
18
CLKOUT SEL1
I
Clock out select signal input 1
19
CLKOUT SEL2
I
Clock out select signal input 2
20
BEEP
O
Beep signal output
21
TUNER ATT
O
Tuner mute signal output
22
ZAPPIN
O
Beep signal output
23
EESIO (TU)
I/O
Tuner EEPROM serial data signal input/output (Not used in this set.)
24
EECKO (TU)
O
Tuner EEPROM serial clock signal output (Not used in this set.)
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
DISP SO/TX
O
Display serial data signal output/Flash write data signal output
30
DISP SI/RX
I
Display serial data signal input/Flash write data signal input
31
DISP CLK/CLK
O
Display serial clock signal output/Flash write clock signal output
32
BUSY
O
Flash write busy signal output Normally operation: “L”
33
CD TX
O
CD MC-bus data signal output
34
CD RX
I
CD MC-bus data signal input
35
E CLK
O
Spectrum analyzer serial clock signal output
36
E DATA
O
Spectrum analyzer serial data signal output
37
CLKOUT
O
Clock signal output
38
EXTATT XEN
O
CD mechanism mute control signal output “L”: valid CD mechanism mute.
39
HOLD
I
External data bus (HOLD) signal input Fixed to “L” for external pull-down resistor.
40
AMP DIAG
I
Amplifi er self-diagnostic test function signal input
41
AMP STB
O
Amplifi er standby signal output
42
NC
O
Not used. (Open)
43
VBUS IN
I
USB power supply request signal input “H”: USB power ON.
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
46
OPEN REQ
I
CD mechanism open request signal input
47
EJECT OK
O
CD mechanism eject control signal output
48
NC
O
Not used. (Open)
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
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