Sony CDX-GT440U Service Manual page 28

CDX-GT440U/GT444U/GT447UE
Pin No. Pin Name
59 MC_RX
60 MC_TX
61 CLK_IN
62 Z_MUTE
63 NCO
64 TEST
65 VCC
66 VSS
67 NCO
68 AMP_STB
69 DIAG
70 VBUS_ON
71 SA_OUT
72 SA_CLK
73 NCO
74 TU_ATT
75 NSMASK
76 RDS_ON
77 FLASH_EN0
78 FLASH_EN1
79 to 81 NCO
82 TU_ATTIN
83 BU_CHECK
84 EQ TYPE_SEL
85 to 89 NCO
90 VCC
91 VSS
92 OSC_OUT
93 OSC_IN
94 NCO
95 SIRCS
96 NCO
97 BEEP
98 ZAPPIN
99 SYNC_OUT
100 DD_ON
28
I/O
I MC-BUS communication and CD mechanism deck micon communication RX input
O MC-BUS communication and CD mechanism deck micon communication TX output
I Flash programming serial clock signal input
I Z mute signal input
O Not used. (Open)
O Not used. (Open)
― Power supply pin (+3.3 V)
― Ground
O Not used. (Open)
O Standby signal output for power regulator IC
I Condition signal input from power amp IC
I VBUS power supply control signal input (L: VBUS OFF, H: VBUS ON)
O Spectrum analyzer serial data output
O Spectrum analyzer serial clock signal output
O Not used. (Open)
O Not used. (Open)
O Not used. (Open)
O Not used. (Open)
I Flash writer programming wake up signal input (Fixed at L)
I Flash writer programming wake up signal input
O Not used. (Open)
O Not used. (Open)
I Back up power supply detect signal input
I Equalizer type setting signal input (L: general model)
O Not used. (Open)
― Power supply pin (+3.3 V)
― Ground
O High speed operation clock signal output (7.92 MHz)
I High speed operation clock signal input (7.92 MHz)
O Not used. (Open)
I Remote control signal input
O Not used. (Open)
O Beep signal output for power amplifi er IC
O Zappin beep signal output
O DC-DC converter oscillation frequency control signal output
O DC-DC converter power supply ON/OFF control signal output
Description