Read Sony CDX-GT25 / CDX-GT29 / CDX-GT29EE Service Manual online
CDX-GT25/GT29/GT29EE
24
• IC Pin Function Description
MAIN BOARD IC501 R5F3640DDA16FA (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
LCD SO
O
Liquid crystal display panel serial data signal output
2
LCD CKO
O
Liquid crystal display panel serial clock signal output
3
NOSE SW
I
Front Panel detach/attach detect signal input “L”: With panel
4
SIRCS
I
Remote control signal input Not used.
5
UNISO
O
SONY BUS serial data signal output
6
UNISI
I
SONY BUS serial data signal input
7
UNISCK
O
SONY BUS serial clock signal output
8
BYTE
I
Connect to ground.
9
CNVSS
I
Flash write signal input Normally operation: “L”, Flash write: “H”
10
XIN
I
Low speed operation clock signal input (32.768kHz)
11
XOUT
O
Low speed operation clock signal output (32.768kHz)
12
RESET
I
Reset signal input
13
OSCOUT
O
High speed operation clock signal output (11.06MHz)
14
VSS
—
Ground pin
15
OSCIN
I
High speed operation clock signal input (11.06MHz)
16
VCC1
—
Power supply pin (+3.3V)
17
NMI
I
External pull up pin (fi xed at “H”.)
18
NCO
O
Not used. (Open)
19
BUIN
I
Back up power supply detection signal input
20
CDM ON
I
CD mechanism deck power supply control request signal input
21
Z MUTE
I
Mute signal input
22 to 27
NCO
O
Not used. (Open)
28
BEEP
O
Beep signal output to power amplifi er
29
I2C SCK
O
I2C serial clock signal output
30
I2C SIO
I/O
I2C serial data signal input/output
31
FW TXD
O
Flash write interface serial data signal output Not used. (Connect to VCC.)
32
FW RXD
I
Flash write interface serial data signal input Not used. (Connect to VCC.)
33
FW CLK
I
Flash write interface serial clock signal input Not used. (Open)
34
FW BUSY
O
Flash write interface serial busy signal output Not used. (Open)
35 to 40
NCO
O
Not used. (Open)
41
EPM
O
EPM signal output (Connect to ground.)
42
RC IN1
I
Rotary commander shift key signal input
43
SYSRST
O
System reset signal output
44
BUSON
O
BUS ON signal output
45
NCO
O
Not used. (Open)
46
CE
O
CE signal output
47 to 51
NCO
O
Not used. (Open)
52
CD ON
I
CD mechanism servo power supply control request signal input
53
TESTIN
I
Test mode detection signal input
54
TELATT
I
Telephone attenuate detection signal input Not used.
55
ACC IN
I
Accessory power supply detection signal input
56
ATT
O
Audio mute control signal output
57
DIAG
I
Power amplifi er status signal input
58
AMPSTB
O
Standby signal output to power regulator IC
59 to 61
NCO
O
Not used. (Open)
62
VCC2
—
Power supply pin (+3.3V)
63
NCO
O
Not used. (Open)
64
VSS
—
Ground pin
65
ILLUMI SEL
I
Illumination voltage setting signal input for panel
66
NCO
O
Not used. (Open)
67
DIM SEL
I
Dimmer function setting signal input “L”: No dimmer
68
B OUT SEL
I
Black out setting signal input “L”: No block out
69
AREASEL 3
I
Destination setting pin 3
70
AREASEL 2
I
Destination setting pin 2
71
AREASEL 1
I
Destination setting pin 1
72
AREASEL 0
I
Destination setting pin 0
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