Ic Pin Function Description - Sony CDX-444RF Service Manual

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6-12. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC201 CXP740056-010R (SYSTEM CONTROLLER)
Pin No. Pin Name
1 to 3 NC
4 AMUTE
5 CDXLT
6 CDDATA
7 CDCLK
8 CDON
9 ELVON
10 to 35 NC
36 LCDON
37 LCDCE
38 RESET
39 GND
40 XTAL
41 EXTAL
42 TEXTSEL
43 LCDINH
TE
L 13942296513
44 LCDDATA
45 LCDCLK
46 CFSEL
47 EEINIT
48 EEDATA
49 EECLK
50 VSS
51 AVREF
52 VDD
53 SINGLE
54 LDON
55 AGCHOLD
56 RF AGC
57 H.TEMP
58 KEYIN
59 EHS
60 MCK
61 NC
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62 ACCIN
63 EJECT
64 MAGSW
.
65 LOAD1
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I/O
— Not used (open)
O Audio line muting on/off control signal output "H": muting on
O Serial data latch pulse signal output to the CXD2598Q (IC101)
O Serial data output to the CXD2598Q (IC101)
O Serial data transfer clock signal output to the CXD2598Q (IC101)
O D/A converter and servo section power supply on/off control signal output "H": power on
O Mechanism deck section power supply on/off control signal output "H": power on
— Not used (open)
The LCD in remote commander and FM transmitter section power supply on/off control signal
O
output "H": power on
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)
I "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
— Ground terminal
O Main system clock output terminal (12 MHz)
I Main system clock input terminal (12 MHz)
CD text mode setting terminal "L": CD text on, "H": does not display track name
I
Not used (open)
O Inhibit signal output to the LCD driver in remote commander
O Serial data output to the LCD driver in remote commander
O Serial data transfer clock signal output to the LCD driver in remote commander
I Custom file on/off setting terminal "L" custom file on Not used (open)
I Initialize signal input for the EEPROM "H": format Not used (open)
I/O Two way data bus with the EEPROM Not used(open)
O Sirial data transfer clock signal output to the EEPROM Not used (open)
— Ground terminal (for A/D converter)
I Reference voltage (+5V) input terminal (for A/D converter)
— Power supply terminal (+5V) (for A/D converter)
Setting terminal for the single disc/multiple discs mode
I
"L": single mode, "H": multiple discs mode Not used (open)
O The laser automatic power control on/off signal output "H": automatic power control on
O RF AGC hold on/off signal output "H": hold on
O RF AGC level control signal output "L ": off, center voltage : 40%, "H": 60%
I High temperature sensor input terminal Not used (open)
I Key input terminal (A/D input) from the remote commander
Elevator height position detection signal input from the RV202 (elevator height sensor)
I
(A/D input)
Input of signal for the fine adjustment (elevator height (address) adjustment; RV201) of elevator
I
position (A/D input)
— Not used (open)
I Accessory detection signal input "L": accessory on
I Eject switch (SW301) input terminal "H" active
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I Magazine in/out detection switch input terminal Not used (open)
i
Chucking end detect switch (SW1) input terminal
I
"L": When completion of the disc chucking operation
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