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Ic Pin Function Description - Sony CDX-434RF Service Manual

Compact disc changer system.
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7-12. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC201 CXP740056-004R (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
1 to 3
NC
Not used (open)
4
AMUTE
O
Audio line muting on/off control signal output terminal "H": muting on
5
CDXLT
O
Serial data latch pulse signal output to the CXD2598Q (IC101)
6
CDDATA
O
Serial data output to the CXD2598Q (IC101)
7
CDCLK
O
Serial data transfer clock signal output to the CXD2598Q (IC101)
8
CDON
O
D/A converter and servo section power supply on/off control signal output "H": power on
9
ELVON
O
Mechanism deck section power supply on/off control signal output "H": power on
10 to 35
NC
Not used (open)
The LCD in remote commander and FM transmitter section power supply on/off control signal
36
LCDON
O
output "H": power on
37
LCDCE
O
Chip enable signal output to the LCD driver in remote commander
System reset signal input from the reset switch (SW302) and reset signal generator (IC303)
38
RESET
I
"L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
39
GND
Ground terminal
40
XTAL
O
Main system clock output terminal (12 MHz)
41
EXTAL
I
Main system clock input terminal (12 MHz)
CD text on/off setting terminal "L" CD text on
42
TEXTSEL
I
434RF: fixed at "H" (open) 530RF/535RF: fixed at "L"
43
LCDINH
O
Inhibit signal output to the LCD driver in remote commander
44
LCDDATA
O
Serial data output to the LCD driver in remote commander
45
LCDCLK
O
Serial data transfer clock signal output to the LCD driver in remote commander
Custom file on/off setting terminal "L" custom file on
46
CFSEL
I
434RF: fixed at "H" (open) 530RF/535RF: fixed at "L"
Initialize signal input for the EEPROM (IC203) "H": format
47
EEINIT
I
434RF: not used (open) 530RF/535RF: fixed at "L"
48
EEDATA
I/O
Two-way data bus with the EEPROM (IC203) (530RF/535RF only) 434RF: not used (open)
Serial data transfer clock signal output to the EEPROM (IC203) (530RF/535RF only)
49
EECLK
O
434RF: not used (open)
50
VSS
Ground terminal (for A/D converter)
51
AVREF
I
Reference voltage (+5V) input terminal (for A/D converter)
52
VDD
Power supply terminal (+5V) (for A/D converter)
Setting terminal for the single disc/multiple discs mode
53
SINGLE
I
"L": single mode, "H": multiple discs mode Fixed at "H" in this set (open)
54
LDON
O
The laser automatic power control on/off signal output "H": automatic power control on
55
AGCHOLD
O
RF AGC hold on/off signal output "H": hold
56
RFAGC
I/O
RF AGC level control signal output "L (O) ": off, "I": 40%, "H (O) ": 60%
57
H.TEMP
I
High temperature sensor input terminal Not used (open)
58
KEYIN
I
Key input terminal (A/D input) from the remote commander
59
EHS
I
Elevator height position detect input from the RV202 (elevator height sensor) (A/D input)
Input of signal for the fine adjustment (elevator height (address) adjustment; RV201) of elevator
60
MCK
I
position (A/D input)
61
NC
Not used (open)
62
ACCIN
I
Accessory detect signal input terminal "L": accessory on
63
EJECT
I
Eject switch (SW301) input terminal "H" active
Function
34
Pin No.
Pin Name
I/O
64
MAGSW
I
Magazine in/out detect switch input Not used (open)
Chucking end detect switch (SW1) input terminal
65
LOAD1
I
"L": When completion of the disc chucking operation
Save end detect switch (SW2) input terminal
66
LOAD2
I
"L": When completion of the disc save operation
67 to 70
NC
Not used (open)
Motor drive signal (save direction) output to the chucking motor drive (IC201)
71
CH.F
O
"L" active *1
Motor drive signal (chucking direction) output to the chucking motor drive (IC201)
72
CH.R
O
"L" active *1
Motor drive signal (elevator down direction) output to the elevator motor drive (IC301)
73
ELVR
O
"L" active *2
Motor drive signal (elevator up direction) output to the elevator motor drive (IC301)
74
ELVF
O
"L" active *2
75
BUCHK
I
Battery detect signal input terminal "H": battery on
76
MGLK
I
Magazine detect switch (SW201) input "L": magazine is set
77
SQSO
O
Subcode Q/text serial data output to the CXD2598Q (IC101)
78
NC
Not used (open)
79
SQCK
O
Subcode Q/text serial data transfer clock signal output to the CXD2598Q (IC101)
Input of acknowledge signal for the key entry
80
KEYACK
I
Acknowledge signal is input to accept from the remote commander in the power off status
81
NC
Not used (open)
82
SCOR
I
Subcode sync (S0+S1) detection signal input from the CXD2598Q (IC101)
83
SIRCS
I
SIRCS signal input from the remote commander (530RF/535RF only)
84
TEX
I
Sub system clock input terminal Not used (open)
85
TX
O
Sub system clock output terminal Not used (open)
86
VSS
Ground terminal
87
VDD
Power supply terminal (+5V)
88
NC
Not used (open)
Sled limit in detect switch (SW3) input terminal
89
LIMSW
I
"L": When the optical pick-up is inner position
90
FOK
I
Focus OK signal input from the CXD2598Q (IC101) "H" is input when focus is on ("L": NG)
91
GFS
I
Guard frame sync signal input from the CXD2598Q (IC101) "L": NG, "H": OK
92
SCLK
O
Serial data transfer clock signal output to the CXD2598Q (IC101)
93
SENS
I
Internal status signal (sense signal) input from the CXD2598Q (IC101)
94
XRST
O
System reset signal output to the CXD2598Q (IC101) "L": reset
95
ADON
O
Power supply on/off control signal output for the A/D converter "L": power on
96
PLLCE
O
Chip enable signal output to the PLL IC (IC781)
97
PLLCLK
O
Serial data transfer clock signal output to the PLL IC (IC781)
98
PLLDATA
O
Serial data output to the PLL IC (IC781)
99, 100
NC
Not used (open)
34
Function

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