Read Sony CDX-GT290EB / CXS-2969F / CXS-29FQ Service Manual online
CDX-GT290EB
24
• IC Pin Function Description
MAIN BOARD (3/3) IC501 R5F3640DDA21FA (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
LCD_SO
O
Liquid crystal display panel serial data signal output
2
LCD_CLK
O
Liquid crystal display panel serial clock signal output
3
NOSE_SW
I
Front panel detach/attach detect signal input (L: with front panel, H: without front panel)
4
SIRCS
I
SIRCS signal input
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
External data bus width select signal input (Connect to VSS in this set)
9
CNVSS
I
Flash writer IF (CNVSS) signal input (L: normally operation, H: fl ash write)
10
XIN
I
Low speed operation clock signal input (32.768 kHz)
11
XOUT
O
Low speed operation clock signal output (32.768 kHz)
12
RESET
I
System reset signal input
13
OSCOUT
O
High speed operation clock signal output (11.06 MHz)
14
VSS
―
Ground
15
OSCIN
I
High speed operation clock signal input (11.06 MHz)
16
VCC1
―
Power supply pin (+3.3 V)
17
NMI
I
Non-maskable interrupt signal input (Fixed at H in this set)
18
EQ_SEL
I
Equalizer type setting signal input (Fixed at H in this set)
19
BUIN
I
Backup power supply detect signal input
20
CDM_ON
I
CD mechanism deck power supply control request signal input
21
Z-MUTE
I
Z mute signal input
22 to 27
NCO
O
Not used. (Open)
28
BEEP
O
Beep signal output for the power amplifi er IC
29
I2C_SCK
O
IIC communication serial clock signal output
30
I2C_SIO
I/O
IIC communication serial data signal input/output
31
FW_TXD
O
Flash writer IF (serial data) signal output
32
FW_RXD
I
Flash writer IF (serial data) signal input
33
FW_CLK
I
Flash writer IF (serial clock) signal input
34
FW_BUSY
O
Flash writer IF (busy) signal output
35 to 40
NCO
O
Not used. (Open)
41
EPM
O
EPM signal output (Connect to VSS in this set)
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 (Connect to CNVSS in this set)
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 detect signal input (Fixed at H in this set)
54
TELATT
I
Telephone attenuator detect signal input (Fixed at L in this set)
55
ACC_IN
I
Accessory power supply detect signal input
56
ATT
O
Audio mute control signal output
57
DIAG
I
Condition signal input from power amp IC
58
AMPSTB
O
Standby signal output for power regulator IC
59
NCO
O
Not used. (Open)
60
NCO
O
Not used. (Open)
61
NCO
O
Not used. (Open)
62
VCC2
―
Power supply pin (+3.3 V)
63
COL SEL/NCO
O
Not used. (Open)
64
VSS
―
Ground
65
ILLUMI SEL
I
Key illumination voltage setting signal input (L: 9 V)
66
NCO
O
Not used. (Open)
67
DIM SEL
I
Dimmer function setting signal input (L: with dimmer function)
68
B-OUT SEL
I
Black out function setting signal input (H: with black out function)
69
AREASEL3
I
Destination setting pin 3 (Fixed at L in this set)
70
AREASEL2
I
Destination setting pin 2 (L: FM (50K)/AM (9K), H: FM (200K)/AM (10K))
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