Sony HCD-C990 Service Manual - Page 91

Sony HCD-C990 - Compact Audio And Video System Manual

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HCD-C770/C990 Pin No. 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 Pin Name AVDD0 ASYO ASYI RFAC AVSS1 CLTV FILO FILI PCO AVDD1 BIAS VCTL V16M VPCO DVDD2 ASYE MD2 DOUT LRCK PCMD BCLK EMPH 69 XTSL 70 DVSS2 71 XTAI 72 XTAO 73 SOUT 74 SOCK 75 XOLT 76 SQSO 77 SQCK 78 SCSY 79 SBSO 80 EXCK I/O Description - Power supply terminal (+3.3V) (analog system) O EFM full-swing output terminal I Asymmetry comparator voltage input terminal I EFM signal input from the DVD/CD RF amplifier - Ground terminal (analog system) I Internal VCO control voltage input terminal O Filter output for master PLL I Filter input for master PLL O Charge pump output for master PLL - Power supply terminal (+3.3V) (analog system) I Asymmetry circuit constant current input terminal I VCO control voltage input terminal for the wideband EFM PLL Not used O VCO oscillation output terminal for the wideband EFM PLL Not used O Charge pump output terminal for the wideband EFM PLL Not used - Power supply terminal (+3.3V) (digital system) I Asymmetry circuit on/off control signal input terminal "L": off, "H": on Not used I Digital out on/off control signal input from the mechanism controller "L": digital out off, "H": digital out on O Digital audio signal output to the digital audio interface IC O L/R sampling clock signal (44.1 kHz) output to the DVD decoder O Serial data output to the DVD decoder O Bit clock signal (2.8224 MHz) output to the DVD decoder O "L" is output when playback disc is emphasis off "H" is output when playback disc is emphasis on Not used I Input terminal for the system clock frequency setting "L": 16.9344 MHz, "H": 33.8688MHz Fixed at "H" in this set - Ground terminal (digital system) I System clock input terminal (33.8688 MHz) O System clock output terminal (33.8688 MHz) Not used O Serial data output terminal Not used O Serial data reading clock signal output terminal Not used O Serial data latch pulse signal output terminal Not used O Subcode Q data output to the mechanism controller I Subcode Q data reading clock signal input from the mechanism controller I Input terminal for resynchronism of guard subcode sync (S0+S1) Not used O Subcode serial data output to the DVD decoder I Subcode serial data reading clock signal input to the DVD decoder 91

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91
HCD-C770/C990
Pin No.
Pin Name
I/O
Description
47
AVDD0
—
Power supply terminal (+3.3V) (analog system)
48
ASYO
O
EFM full-swing output terminal
49
ASYI
I
Asymmetry comparator voltage input terminal
50
RFAC
I
EFM signal input from the DVD/CD RF amplifier
51
AVSS1
—
Ground terminal (analog system)
52
CLTV
I
Internal VCO control voltage input terminal
53
FILO
O
Filter output for master PLL
54
FILI
I
Filter input for master PLL
55
PCO
O
Charge pump output for master PLL
56
AVDD1
—
Power supply terminal (+3.3V) (analog system)
57
BIAS
I
Asymmetry circuit constant current input terminal
58
VCTL
I
VCO control voltage input terminal for the wideband EFM PLL
Not used
59
V16M
O
VCO oscillation output terminal for the wideband EFM PLL
Not used
60
VPCO
O
Charge pump output terminal for the wideband EFM PLL
Not used
61
DVDD2
—
Power supply terminal (+3.3V) (digital system)
62
ASYE
I
Asymmetry circuit on/off control signal input terminal
“L”: off,
“H”: on
Not used
63
MD2
I
Digital out on/off control signal input from the mechanism controller
“L”: digital out off,
“H”: digital out on
64
DOUT
O
Digital audio signal output to the digital audio interface IC
65
LRCK
O
L/R sampling clock signal (44.1 kHz) output to the DVD decoder
66
PCMD
O
Serial data output to the DVD decoder
67
BCLK
O
Bit clock signal (2.8224 MHz) output to the DVD decoder
68
EMPH
O
“L” is output when playback disc is emphasis off
“H” is output when playback disc is emphasis on
Not used
69
XTSL
I
Input terminal for the system clock frequency setting
“L”: 16.9344 MHz,
“H”: 33.8688MHz
Fixed at “H” in this set
70
DVSS2
—
Ground terminal (digital system)
71
XTAI
I
System clock input terminal (33.8688 MHz)
72
XTAO
O
System clock output terminal (33.8688 MHz)
Not used
73
SOUT
O
Serial data output terminal
Not used
74
SOCK
O
Serial data reading clock signal output terminal
Not used
75
XOLT
O
Serial data latch pulse signal output terminal
Not used
76
SQSO
O
Subcode Q data output to the mechanism controller
77
SQCK
I
Subcode Q data reading clock signal input from the mechanism controller
78
SCSY
I
Input terminal for resynchronism of guard subcode sync (S0+S1)
Not used
79
SBSO
O
Subcode serial data output to the DVD decoder
80
EXCK
I
Subcode serial data reading clock signal input to the DVD decoder