Sony CDX-GT828U Service Manual page 35

Pin No. Pin Name
53 TEL_ATT
54 TEST_IN
55 RC_IN1
56 SYSRESET
57 BUS_ON
58 FSW OUT
59 B-OUTSEL
60 VCC2
61 NC
62 VSS
63 IPOD_DET
64 IPOD_CHARGE
65 VBUS_ON
66 CHG-CHK
67, 68 NC
69 USB_ON
70 DST_SEL1
71 DST_SEL2
72 FL_ON
73 BU_IN
74 FLD_ON
75 HS_EN
76 HS_OC
77 RE_1
78 RE_0
79 NOSE
80, 81 NC
82 QUALITY
83 VSM
84 KEY_IN0
85 SP_IN
86 RC_IN0
87 KEY_ACK2
88 KEY_ACK0
89 NC
90 DISP_RESET
91 DOOR
92 NC
93 DISP_CE
94 AVSS
95 DOOR_IND
96 VREF
97 AVCC
98 DISP SI/RX
99 DISP SO/TX
100 DISP CKO
I/O
I Telephone attenuator detection signal input
I Test mode detection signal input (Open)
I Rotary commander shift key signal input
O System reset signal output
O Bus ON signal output
O DC-DC converter oscillation frequency serection signal output
Black out mode with/without setting signal input (L: without black out mode (CDX-GT828U),
I
H: with black out mode (CDX-GT870US/GT878US))
―
Power supply pin (+3.3 V)
O Not used. (Open)
―
Ground
I Not used. (Open)
O Not used. (Open)
O VBUS control request signal input (L: VBUS OFF request, H: VBUS ON request)
I Not used. (Open)
O Not used. (Open)
USB power supply control signal output (L: USB power supply OFF, H: USB power supply
O
ON)
I Destination setting pin (Fixed at L)
I Destination setting pin (L: CDX-GT870US/GT878US, H: CDX-GT828U)
O FL power supply control signal output (L: FL power supply ON, H: FL power supply OFF)
I Back-up power supply detection signal input
O FL driver power supply ON/OFF signal output
O Highside switch control signal output (L: VBUS power shut-down, H: VBUS power supply)
I Highside switch over-current detection signal input
I Rotary encoder signal input 1
I Rotary encoder signal input 0
I Front panel detachable detection signal input (L: with front panel, H: without front panel)
O Not used. (Open)
I Tuner noise detection signal input
I S meter voltage detection signal input
I Key signal input
I Spectrum analyzer signal input
I Rotary commander key signal input
I Rotary commander key acknowledge detection signal input
I Key acknowledge detection signal input
O Not used. (Open)
O Display reset signal output
I Front panel open/close detection signal input (L: front panel close, H: front panel open)
O Not used. (Open)
O Display chip enable signal output
―
Analog ground
O DOOR indicator LED power supply control signal output
―
Reference voltage pin for A/D converter. (+3.3 V)
―
Analog power supply pin (+3.3 V)
I Display communication signal input
O Display communication signal output
O Display communication clock signal output
CDX-GT828U/GT870US/GT878US
Description
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