Read Sony CDX-GT540UI / CDX-GT54UIW Service Manual online
CDX-GT54UIW/GT540UI
26
Pin No.
Pin Name
I/O
Description
58
WAKE_UP
O
CD mechanism deck micon wake up signal output
59
MC_RX
I
MC-BUS communication and CD mechanism deck micon communication RX input
60
MC_TX
O
MC-BUS communication and CD mechanism deck micon communication TX output
61
CLK_IN
I
Flash programming serial clock signal input
62
Z_MUTE
I
Z mute signal input
63
NCO
O
Not used. (Open)
64
TEST
O
Not used. (Open)
65
VCC
―
Power supply pin (+3.3 V)
66
VSS
―
Ground
67
NCO
O
Not used. (Open)
68
AMP_STB
O
Standby signal output for power regulator IC
69
DIAG
I
Condition signal input from power amp IC
70
VBUS_ON
I
VBUS power supply control signal input (L: VBUS OFF, H: VBUS ON)
71
SA_OUT
O
Spectrum analyzer serial data output
72
SA_CLK
O
Spectrum analyzer serial clock signal output
73
NCO
O
Not used. (Open)
74
TU_ATT
O
Tuner mute control signal output (Not used in this set)
75
NSMASK
O
Not used. (Open)
76
RDS_ON
O
RDS IC power supply control signal output (Except US model)
77
FLASH_EN0
I
Flash writer programming wake up signal input (Fixed at L)
78
FLASH_EN1
I
Flash writer programming wake up signal input
79 to 81
NCO
O
Not used. (Open)
82
TU_ATTIN
O
Not used. (Open)
83
BU_CHECK
I
Back up power supply detect signal input
84
DAVN
I
RDS data block sync detect signal input (Except US model)
85 to 89
NCO
O
Not used. (Open)
90
VCC
―
Power supply pin (+3.3 V)
91
VSS
―
Ground
92
OSC_IN
I
High speed operation clock signal input (7.92 MHz)
93
OSC_OUT
O
High speed operation clock signal output (7.92 MHz)
94
NCO
O
Not used. (Open)
95
SIRCS
I
Remote control signal input
96
NCO
O
Not used. (Open)
97
BEEP
O
Beep signal output for power amplifi er IC
98
ZAPPIN
O
Zappin beep signal output
99
SYNC_OUT
O
DC/DC converter oscillation frequency control signal output
100
DD_ON
O
DC/DC converter power supply ON/OFF control signal output
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