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38
CDX-GT50W/GT500/GT500EE/GT550
IC711 MB90487APF-G-162E1 (SYSTEM CONTROL) (MAIN BOARD (3/3))
Pin No.
Pin Name
I/O
Pin Description
1
AREASEL2
I
Destination setting pin
2
AREASEL1
I
Destination setting pin
3
AREASEL0
I
Destination setting pin
4
NCO
O
Not used. (Open)
5
NOSE SW
I
Front panel open/close detect signal input L: Panel on, H: Panel off
6
NCO
O
Not used. (Open)
7
BEEP
O
Beep signal output
8
DIAG
I
Power AMP status signal input
9
VOL ATT
O
Electronic volume attenuate control signal output
10
FSW IN
I
D/D converter oscillater frequency count signal input
11
VSS
—
Ground pin
12
TUATT
O
Tuner mute control signal output
13
NSMASK
O
Noise mask signal output (AEP, UK model only)
14
ILLUMI SEL
I
Illumination voltage setting signal input
15
SEL1
O
Not used in this set. (Open)
16
NCO
O
Not used. (Open)
17
AUXIN
O
AUX select signal output L: AUX, H: BUS IN
18
DISP RSET
O
Display reset signal output
19
FL ON
O
D/D converter control signal output H: On
20
DISP ON
O
Display control signal output H: On
21
ATT
O
Audio mute control signal output
22
SYSRST
O
System control reset signal output
23
VCC5
—
Power supply pin (+3.3 V)
24
EEP SIO
I/O
EEPROM bus serial data input/output
25
EEP CKO
O
EEPROM bus serial clock output
26
AMPSTB
O
Power AMP satandby signal output
27
DISP RX
I/O
Display IC communication signal input/output
28
DISP TX
O
Display IC communication signal output
29
MAST IF
O
Display IC communication start signal output
30
RDS ON
O
RDS ON signal output (AEP, UK model only)
31
RE IN0
I
Rotary encoder signal input 0
32
RE IN1
I
Rotary encoder signal input 1
33
I2C SCK
O
I2C bus serial clock signal output
34
I2C SIO
I/O
I2C bus serial data signal input/output
35
DAVDD
—
A/D converter power supply pin (+3.3 V)
36
AVRH
—
A/D converter external reference power supply pin (+3.3 V)
37
DAVSS
—
Ground pin
38
QUALITY
I
Noise detect signal input (AEP, UK model only)
39
VSM
I
S-meter voltage detect signal input
40
KEYIN1
I
Key signal input 1
41
KEYIN0
I
Key signal input 0
42
VSS
—
Ground pin
43
RC IN0
I
Rotary commander key signal input
44
SA IN
I
Spectrum analyzer signal input
45
SA CKO
O
Spectrum analyzer clock signal output
46 to 48
NCO
O
Not used. (open)
49
MD0
I
Operation mode setting pin (Connect to VDD.)
50
MD1
I
Operation mode setting pin (Connect to VDD.)
51
MD2
I
Operation mode setting pin (Connect to VSS.)
