Sony 757MX Service Manual - Page 40

Pin No., Pin Name, Description

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Page 40 highlights

CDX-757MX Pin No. 54 55, 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70, 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 to 89 90 91 92 93, 94 95 96 97 Pin Name AVCC MD0, MD1 OSC2 OSC1 RES NMI STBY VCC XTAL VSS EXTAL FEW MD2 FL BOOT FL W NC MGLK-SW DECINT NC EJECT SO SI SCLK EEDATA SDA SCL EECLK NC SQSO SQCK NC R/RW SEL BUSON BUCHK NC LOADF LOADR SINGLE 98 LOAD SW 99 SAVE SW 100 LIM SW I/O Description - Power supply terminal (+3.3V) (for A/D converter) I Setting terminal for the CPU operational mode "H": single chip mode (fixed at "H" in this set) O Sub system clock output terminal Not used I Sub system clock input terminal Not used (fixed at "L") I System reset signal input from the SONY bus interface and reset signal generator "L": reset For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H" O Not used (fixed at "H") O Standby mode control signal output terminal Not used (fixed at "H") - Power supply terminal (+3.3V) I Main system clock input terminal (12.288 MHz) - Ground terminal O Main system clock output terminal (12.288 MHz) I Flash memory data write enable signal input terminal I Setting terminal for the CPU operational mode "H": single chip mode (fixed at "H" in this set) I Flash memory data write control signal input terminal "L" active O Flash memory data write control signal output (connecting FEW (pin 66)) O Not used I Magazine in/out detect switch input terminal "L": magazine in I Interrupt signal input from the CD-ROM/MP3 decoder O Not used I Eject switch input terminal "L" active O Serial data output to the SONY bus interface I Serial data input from the SONY bus interface I Serial data transfer clock signal input from the SONY bus interface I/O Two-way data bus with the EEPROM I/O I2C interface data input/output with the CD-ROM/MP3 decoder O I2C interface data transfer clock signal output to the CD-ROM/MP3 decoder O Serial data transfer clock signal output to the EEPROM O Not used I Subcode Q data input from the DSP O Subcode Q data reading clock signal output to the DSP O Not used O CD-ROM/RW selection signal output "L": CD-RW, "H": CD-ROM I Bus on/off control signal input from the SONY bus interface "L": bus on I Battery detection signal input "H": low battery (Normally: "L") O Not used O Motor drive signal (load chucking direction) output to the chucking motor drive O Motor drive signal (save direction) output to the chucking motor drive I Setting terminal for the single disc/multiple discs mode "L": single disc mode, "H": multiple discs mode (fixed at "H" in this set) I Chucking end detect switch input terminal "L": When completion of the disc chucking operation I Save end detect switch input terminal "L": When completion of the disc save operation I Sled limit in detect switch input terminal "L": When the optical pick-up is inner position 40

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40
CDX-757MX
Pin No.
Pin Name
I/O
Description
54
AVCC
—
Power supply terminal (+3.3V) (for A/D converter)
55, 56
MD0, MD1
I
Setting terminal for the CPU operational mode
“H”: single chip mode (fixed at “H” in this set)
57
OSC2
O
Sub system clock output terminal
Not used
58
OSC1
I
Sub system clock input terminal
Not used (fixed at “L”)
59
RES
I
System reset signal input from the SONY bus interface and reset signal generator
“L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
60
NMI
O
Not used (fixed at “H”)
61
STBY
O
Standby mode control signal output terminal
Not used (fixed at “H”)
62
VCC
—
Power supply terminal (+3.3V)
63
XTAL
I
Main system clock input terminal (12.288 MHz)
64
VSS
—
Ground terminal
65
EXTAL
O
Main system clock output terminal (12.288 MHz)
66
FEW
I
Flash memory data write enable signal input terminal
67
MD2
I
Setting terminal for the CPU operational mode
“H”: single chip mode (fixed at “H” in this set)
68
FL BOOT
I
Flash memory data write control signal input terminal
“L” active
69
FL W
O
Flash memory data write control signal output (connecting FEW (pin 66))
70, 71
NC
O
Not used
72
MGLK-SW
I
Magazine in/out detect switch input terminal
“L”: magazine in
73
DECINT
I
Interrupt signal input from the CD-ROM/MP3 decoder
74
NC
O
Not used
75
EJECT
I
Eject switch input terminal
“L” active
76
SO
O
Serial data output to the SONY bus interface
77
SI
I
Serial data input from the SONY bus interface
78
SCLK
I
Serial data transfer clock signal input from the SONY bus interface
79
EEDATA
I/O
Two-way data bus with the EEPROM
80
SDA
I/O
I2C interface data input/output with the CD-ROM/MP3 decoder
81
SCL
O
I2C interface data transfer clock signal output to the CD-ROM/MP3 decoder
82
EECLK
O
Serial data transfer clock signal output to the EEPROM
83
NC
O
Not used
84
SQSO
I
Subcode Q data input from the DSP
85
SQCK
O
Subcode Q data reading clock signal output to the DSP
86 to 89
NC
O
Not used
90
R/RW SEL
O
CD-ROM/RW selection signal output
“L”: CD-RW, “H”: CD-ROM
91
BUSON
I
Bus on/off control signal input from the SONY bus interface
“L”: bus on
92
BUCHK
I
Battery detection signal input
“H”: low battery (Normally: “L”)
93, 94
NC
O
Not used
95
LOADF
O
Motor drive signal (load chucking direction) output to the chucking motor drive
96
LOADR
O
Motor drive signal (save direction) output to the chucking motor drive
97
SINGLE
I
Setting terminal for the single disc/multiple discs mode
“L”: single disc mode, “H”: multiple discs mode (fixed at “H” in this set)
98
LOAD SW
I
Chucking end detect switch input terminal
“L”: When completion of the disc chucking operation
99
SAVE SW
I
Save end detect switch input terminal
“L”: When completion of the disc save operation
100
LIM SW
I
Sled limit in detect switch input terminal
“L”: When the optical pick-up is inner position