CDX-C5000RV - Sony Car Audio Service Manual (repair manual). Page 21

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21
• IC501 MB90574BPMT-G-266-BND (SYSTEM CONTROL) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
TUNON
O
Tuner power control output (+5 V)
2
Not used. (Open)
3
BUSON
O
SONY-BUS ON control output
4 – 6
Not used. (Open)
7
ILLON
O
Illumination power control output
8
VCC
Power supply pin (+5 V)
9
E2P SIO
I/O
E
2
P SONY-BUS serial data input/output
10
E2P CKO
I/O
E
2
P SONY-BUS serial clock input/output
11
SYSRST
O
SONY-BUS system reset output
12
DOORSW (WRITE OUT)
I
DOOR OPEN/CLOSE detection input (“L”: CLOSE, “H”: OPEN)
13
LCDSO (WRITE IN)
O
LCD serial data output
14
LCDCKO
O
LCD serial clock output
15
LCDCE
O
LCD chip enable output
16
BEEP
O
BEEP output
17
UNISI
I
SONY-BUS serial data input
18
UNISO
O
SONY-BUS serial data output
19
UNICKO
O
SONY-BUS serial clock output
20
UNICKI
I
SONY-BUS serial clock input
21
CD MD
I
CD/MD select input (“L”: CD, “H”: MD) (Fixed at “L” in this set)
22
FLASHW
I
Flash memory write mode detection input
23
Not used. (Open)
24
SIRCS
I
Remote commander (infrared ray reception) input
25 – 28
Not used. (Open)
29
DOORIND
O
DOOR indicator output
30
IFWIDTH
O
Not used in this set.
31
Not used. (Open)
32
NS MASK
O
Noise mask output
33
VSS
Ground
34
C
Condenser connection pin of power stabilization.
35
AD ON
O
Power control output for A/D converter.
36, 37
REIN0, 1
I
Rotary encoder 0, 1 input
38
DVCC
D/A converter Vref pin (+5 V)
39
DVSS
D/A converter ground pin
40, 41
Not used. (Open)
42
AVCC
Analog power supply pin (+5 V)
43
AVRH
A/D converter Vref+ pin (+5 V)
44
AVRL
A/D converter Vref– pin
45
AVSS
Analog ground
46, 47
KEYIN0, 1
I
Key 0, 1 input
48
RCIN0
I
Rotary commander key input
49
DSTSEL
I
Destination setting input (Fixed at “L” in this set)
50
QUALITY
I
Noise detection input
51
FMAGC
I
FM AGC detection input
52
MPTH
I
Multi path detection input
53
VSM
I
Signal meter detection input
54
VCC
Power supply pin (+5 V)
55
RAMBU
I
RAM reset detection input
56
TUNATT
O
TUNER mute control output
57
VOLATT
O
Electric volume mute output
58
ATT
O
LINE mute output
59
AMPON
O
Power amplifier standby control output
60
AMPATT
O
Power amplifier mute control output
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