Read Sony CDX-GT23W / CDX-GT24 / CDX-GT24EE / CXS-GT2413E / CXS-GT2469E Service Manual online
CDX-GT23W/GT24/GT24EE
28
• IC Pin Function Description
MAIN BOARD IC501 R5F3640DDA08FA (SYSTEM CONTROL)
MAIN BOARD IC501 R5F3640DDA08FA (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
Panel detection signal input
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
DAVN
I
RDS data block cycle detection signal input (Not used: GT23W)
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
32
FW RXD
I
Flash write interface serial data signal input
33
FW CLK
I
Flash write interface serial clock signal input
34
FW BUSY
O
Flash write interface serial busy signal output
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 (fi xed at “H”.)
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 Not used.
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
Condition signal input from power amplifi er IC
58
AMPSTB
O
Standby signal output to power regulator IC
59
VOLATT
O
Electrical volume attenuate control signal output
60
DEMO DISP SEL
I
Demonstration mode display setting signal input “H”: SUPPOR display, “L”: No display
61
R/S SW SEL
I
REAR SUB selection setting terminal “H”: switched, “L”: No switched
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 “H”: 10.4V, “L”: 9V
66
DEMO SEL
I
DEMO select signal input “H”: DEMO on
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
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