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Sony CDX-GT49UM Service Manual page 27

Fm/am compact disc player
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• IC Pin Function Description
MAIN BOARD (2/3) IC401 MB90F882PF-G-111E1 (SYSTEM CONTROL)
Pin No.
Pin Name
1
CYRIL_SEL
2
B-OUT_SEL
3
COL SW_SEL
4
ILLUMI_SEL
5, 6
NCO
7
NOSE_SW
8 to 10
NCO
11
RE_IN0
12
RE_IN1
13
X_OUT
14
X_IN
15
VCC
16
VSS
17
C
18
UNISI
19
UNISO
20
UNISCK
21
USB_ON
22
I2C_SIO
23
I2C_SCK
24
USB_OVER
25
BUS_ON
26
SYS_RST
27
CD_ON
28
CDM_ON
29
ACC_IN
30
TEL_ATT
31
ATT
32
AVCC
33
AVRH
34
RC_IN1
35
AVSS
36
QUALITY
37
VSM
38
SA_IN
39
KEY_IN1
40
KEY_IN0
41
RC_IN0
42, 43
NCO
44
VSS
45
KEY_ACK0
46
KEY_ACK1
47
EXTATT_XEN
48
LCD_CE
49
LCD_SO
50
LCD_SCK
51
MOD2
52
MOD1
53
MOD0
54
RESET
55
AREA_SEL2
56
AREA_SEL1
57
AREA_SEL0
58
WAKE_UP
59
MC_RX
60
MC_TX
CDX-GT49UM/GT490U/GT490US/GT494U
I/O
I
Cyril select signal input (L: No cyril select)
I
Black out setting select signal input (H: Black out)
I
Key illumination initial color setting select signal input (H: Blue)
I
Key illumination voltage setting select signal input (H: 10.4 V)
O
Not used. (Open)
I
Front panel detach/attach detect signal input (L: with front panel, H: without front panel)
O
Not used. (Open)
I
Rotary encoder signal input 0
I
Rotary encoder signal input 1
O
Low speed operation clock signal output (32.768 kHz)
I
Low speed operation clock signal input (32.768 kHz)
Power supply pin (+3.3 V)
Š
Ground
Š
Regulator reference capacitor connecting pin
Š
I
SONY-BUS data input (Fixed at L in this set)
O
Not used. (Open)
O
Not used. (Open)
O
USB over current detect IC control signal output
I/O
IIC serial data input/output
O
IIC serial clock signal output
I
USB over current detect signal input
O
BUS ON signal output (Fixed at L in this set)
O
System reset signal output
I
CD mechanism servo power supply control request signal input
I
CD mechanism deck power supply control request signal input
I
Accessory power supply detect signal input
I
Telephone attenuator detect signal input (Fixed at L in this set)
O
Audio mute control signal output
A/D converter power supply pin (+3.3 V)
Š
A/D converter external reference power supply pin (+3.3 V)
Š
I
Rotary commander shift key signal input 1
Ground for A/D converter
Š
I
Not used. (Open)
I
S meter voltage detect signal input
I
Spectrum analyzer DC input
I
Key signal input 1
I
Key signal input 0
I
Rotary commander shift key signal input 0
O
Not used. (Open)
Ground
Š
I
Key acknowledge detect signal input (Rotary commander)
I
Key acknowledge detect signal input (Front panel)
L is sent when electronic volume IC has the status of CD/USB (H is sent when it has the status
O
of other source)
O
LCD driver chip enable signal output
O
LCD driver serial data output
O
LCD driver serial clock signal output
I
Micon operation mode setting signal input (active: L)
I
Micon operation mode setting signal input (Fixed at H in this set)
I
Micon operation mode setting signal input (active: H)
I
Reset signal input
I
Destination setting pin 2
I
Destination setting pin 1 (Fixed at L in this set)
I
Destination setting pin 0 (Fixed at L in this set)
O
CD mechanism deck micon wake up signal output
I
MC-BUS communication and CD mechanism deck micon communication RX input
O
MC-BUS communication and CD mechanism deck micon communication TX output
Description
27

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This manual is also suitable for:

Cdx-gt490uCdx-gt490usCdx-gt494u