Sony 757MX - Xplod CDX CD Service Manual page 40

CDX-757MX
Pin No. Pin Name
54 AVCC
55, 56 MD0, MD1
57 OSC2
58 OSC1
59 RES
60 NMI
61 STBY
62 VCC
63 XTAL
64 VSS
65 EXTAL
66 FEW
67 MD2
68 FL BOOT
69 FL W
70, 71 NC
72 MGLK-SW
73 DECINT
74 NC
75 EJECT
76 SO
77 SI
78 SCLK
79 EEDATA
80 SDA
81 SCL
82 EECLK
83 NC
84 SQSO
85 SQCK
86 to 89 NC
90 R/RW SEL
91 BUSON
92 BUCHK
93, 94 NC
95 LOADF
96 LOADR
97 SINGLE
98 LOAD SW
99 SAVE SW
100 LIM SW
40
I/O
— 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")
System reset signal input from the SONY bus interface and reset signal generator "L": reset
I
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
Setting terminal for the single disc/multiple discs mode
I
"L": single disc mode, "H": multiple discs mode (fixed at "H" in this set)
Chucking end detect switch input terminal
I
"L": When completion of the disc chucking operation
Save end detect switch input terminal
I
"L": When completion of the disc save operation
Sled limit in detect switch input terminal
I
"L": When the optical pick-up is inner position
Description