C-V751
4
CIRCUIT DESCRIPTION
Pin No.
Pin Name
I/O Description
ACTIVE
H
L
1
AMUTE
O
Audio muting control.
Mute:ON
Mute:OFF
2
POWER
O
Power ON/OFF relay control.
Power:ON
Power:OFF
3
POWER
O
Power amplifier relay control.
Power:ON
Power:OFF
4
F RLY
O
Front speaker relay control.
Relay:ON
Relay:OFF
5
C RLY
O
Relay control of center,surround and SW woofer.
Relay:ON
Relay:OFF
6
S RLY
O
Rear speaker relay control.
Mute:ON
Mute:OFF
7
+3dB
O
+3dB attenuation control for super woofer.
ATT:ON
ATT:OFF
8
20dB
O
+20dB attenuation control for volume control.
20dB gain
9
PROTECTION
I
Detection terminal of protection signal.
PRT:ON
10
S DATA
I/O Serial communication data signal.
11
S BUSY
I/O Serial communication busy signal.
12
T MUTE
O
Muting control of audio signal for tuner.
Mute:ON
Mute:OFF
13
PLL CLK
O
Clock output of PLL IC for tuner.
14
PLL DATA
O
Data output of PLL IC for tuner.
15
PLL CE
O
Chip enable of PLL IC for tuner.
16
PLL DO
I
Data input from PLL IC.
17
SD
I
Syntony signal input of tuner.
18
STEREO
I
Stereo signal input.
19~22
T SW1~4
I
Discrimination of the tuner destination.
23
M OPEN
O
Control terminal of motor driver.(Motor CW
î
Door open)
24
M CLOSE
O
Control terminal of motor driver.(Motor CCW
î
Door close)
25
OPEN SW
I
Detection port of door open/close switch.
Open
26
CLOSE SW
I
Detection port of door open/close switch.
Close
27
DIG. H
O
Port for digital input.
28
RWR
I
Reading of interactive remote control data.
H:End of reading data.
29
ENB
I
Permission of transmission .
Permission
30
REQ
O
Request of transmission.
No Request
31~38
R DATA1~8
O
Data output to remote control microprocessor.
39
CE
I
Chip enable.
40
RST
I
Reset signal input.
41
VSS
-
Ground.
42
XTAL
-
16MHz main oscillator.
43
EXTAL
I
16MHz main oscillator.
44
SEL STB2
O
Unused.
45
SEL STB1
O
Strobe output to selector IC.
46
SELCLK
O
Clock output to selector IC.
47
SEL DT
O
Data output to selector IC.
48~50
VIDEO1~3
O
Control port for video selector.
51
DSP RST2
O
Reset signal output to DSP.
52
AVSS
-
Ground.
53
AVREF
-
Connected to VCC.
54
AVDD
-
Power 5.0V).
55
VOL CLK
O
Clock output to electric volume(IC28).
56
VOL DATA
O
Data output to electric volume(IC28).
57
VOL LATCH
O
Latch output to electric volume(IC28).
58
CODEC RST
O
Reset port to A/D,D/A converter.
59
-
-
Unused.
60
RDS SLEVEL
I
Signal level input from RDS decoder.
61
DOOR KEY
I
Detection port of door key(S16) .
62
POW KEY
I
Detection port of power key(S3).
63
OESL
O
Switching the output enable.
64
AUDIO
I
Detection port of audio.
4. Microprocessor: CXP740010-107Q(X08,IC16)
4-1 Port description of microprocessor
Содержание C-V751
Страница 30: ...C V751 39 PARTS DESCRIPTIONS ...
