CDX-GT33U
28
• IC Pin Function Description
MAIN BOARD (3/3) IC401 MB90F882PF-G-102E1 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
NCO
O
Not used. (Open)
2
B-OUT_SEL
I
Black out setting signal input (L: no black out (AEP, UK, IT, RU model), H: Black out (E, MX
model))
3 to 6
NCO
O
Not used. (Open)
7
NOSE_SW
I
Front panel detach detect signal input
8 to 10
NCO
O
Not used. (Open)
11
RE_IN0
I
Rotary encoder signal input 0
12
RE_IN1
I
Rotary encoder signal input 1
13
X_OUT
O
Low speed operation clock signal output (32.768 kHz)
14
X_IN
I
Low speed operation clock signal input (32.768 kHz)
15
VCC
—
Power supply pin (+3.3 V)
16
VSS
—
Ground
17
C
—
Regulator reference capacitor connecting pin
18
UNISI
I
SONY-BUS data input (Fixed at L in this set)
19
UNISO
O
SONY-BUS data output (Not used in this set)
20
UNISCK
O
SONY-BUS clock signal output (Not used in this set)
21
USB_ON
O
USB over current detect IC control signal output
22
I2C_SIO
I/O
I2C serial data input/output
23
I2C_SCK
O
I2C serial clock signal output
24
USB_OVER
I
USB over current detect signal input
25
BUS_ON
O
BUS ON signal output (Fixed at H in this set)
26
SYS_RST
O
System reset signal output
27
CD_ON
I
CD mechanism servo power supply control request signal input
28
CDM_ON
I
CD mechanism deck power supply control request signal input
29
ACC_IN
I
Accessory power supply detect signal input
30
TEL_ATT
I
Telephone attenuator detect signal input (L: E, MX model, H: AEP, UK, IT, RU model)
31
ATT
O
Audio mute control signal output
32
AVCC
—
A/D converter power supply pin (+3.3 V)
33
AVRH
—
A/D converter external reference power supply pin (+3.3 V)
34
RC_IN1
I
Rotary commander shift key signal input 1
35
AVSS
—
Ground for A/D converter
36
NCO
O
Not used. (Open)
37
VSM
I
S meter voltage detect signal input
38
SA_IN
I
Spectrum analyzer DC input
39
KEY_IN1
I
Key signal input 1
40
KEY_IN0
I
Key signal input 0
41
RC_IN0
I
Rotary commander shift key signal input 0
42, 43
NCO
O
Not used. (Open)
44
VSS
—
Ground
45
KEY_ACK0
I
Key acknowledge detect signal input (Rotary commander)
46
KEY_ACK1
I
Key acknowledge detect signal input (Front panel)
47
EXTATT_XEN
O
L is sent when electronic volume IC has the status of CD/USB (H is sent when it has the
status of other source)
48
LCD_CE
O
LCD driver chip enable signal output
49
LCD_SO
O
LCD driver serial data output
50
LCD_SCK
O
LCD driver serial clock signal output
51
MOD2
I
Micon operation mode setting signal input (active: L)
52
MOD1
I
Micon operation mode setting signal input (Fixed at H in this set)
53
MOD0
I
Micon operation mode setting signal input (active: H)
54
RESET
I
Reset signal input
55
AREA_SEL2
I
Destination setting pin 2 (L: AEP, UK, IT, RU model, H: E, MX model)
56
AREA_SEL1
I
Destination setting pin 1 (Fixed at L in this set)
57
AREA_SEL0
I
Destination setting pin 0 (L: E, MX model, H: AEP, UK, IT, RU model)
58
WAKE_UP
O
CD mechanism deck micon wake up signal output
