Read Sony CDX-MP450X Service Manual online
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21
CDX-MP450X
Pin No.
Pin Name
I/O
Pin Description
58
ANT ON
O
Car antenna control output
59
EZ SEL
I
Rotary commander shift key input
60
POWER ON
O
System power on/off control and power amplifier control output
61 – 63
NC
—
Not used. (Open)
64
ST IN
I
FM stereo indicator input (L: FM STEREO ON, H: FM MONO ON)
65
LCD CK0
O
Clock data output for LCD driver IC.
66
LCD SO
O
Serial data output for LCD driver IC.
67
NC
—
Not used. (Open)
68
MSC
O
Serial clock output to slave microcomputer IC.
69
MSI
I
Serial input from slave microcomputer IC.
70
MSO
O
Serial output to slave microcomputer IC.
71
MSRQ
I
Serial request input from slave microcomputer IC.
72
MCS
O
Chip select output to slave microcomputer IC.
73
NC
—
Not used. (Open)
74
VREF
—
Reference power supply voltage pin
75
GND0
—
Ground
76
X OUT
O
Crystal oscillator output (4.5 MHz)
77
X IN
I
Crystal oscillator input (4.5 MHz)
78
BU IN
I
Back-up power supply input
79
VDD0
—
Power supply pin
80
RESET
I
Reset input
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