Ic Pin Function Description - Sony CDX-600 Service Manual

7-8. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC302 CXP84124-080Q (SYSTEM CONTROLLER)
Pin No. Pin Name
1 LIM.SW
2 BUSON
3 EJECT
4 LOAD1
5 LOAD2
6 A.MUTE
7 EMPH
8 CH.R
9 CH.F
10 —
11 ELV.R
12 ELV.ON
13 CD RST
14 CDON
15 to 23 —
24 AUTO ON/OFF
25 to 29 —
30 RESET
31 EXTAL
32 XTAL
33 VSS
34 TX
35 TEX
36 AVSS
37 AVREF
38 ATRIBT
39 MCK
40 EHS
41 to 47 —
48 SCK
49 SI
50 SO
51 SQCLK
52 SUBQ
53 —
54 —
55 MGLK
I/O
Sled limit in detect switch (SW1) input terminal
I
"L": When the optical pick-up is inner position
I Bus on/off control signal input from the SONY bus interface (IC204) "H": bus on
I Eject switch (SW303) input terminal "H" active
Save end detect switch (SW12) input terminal
I
"L": When completion of the disc chucking operation
Chucking end detect switch (SW11) input terminal
I
"L": When completion of the disc chucking operation
O Audio line muting on/off control signal output terminal "H": muting on
O Emphasis mode output to the D/A converter (IC401) "L": emphasis on
Motor drive signal (save direction) output to the chucking motor drive (IC52)
O
"H" active *1
Motor drive signal (load chucking direction) output to the chucking motor drive (IC52)
O
"H" active *1
O Not used (open)
Motor drive signal (elevator down direction) output to the elevator motor drive (IC301)
O
"L" active *2
O Mechanism deck section power supply on/off control signal output "H": power on
O System reset signal output to the CXA1992BR (IC11) and CXD2530Q (IC101) "L": reset
O D/A converter and servo section power supply on/off control signal output "H": power on
O Not used (open)
Setting terminal for the automatic adjustment
I
"L": automatic adjustment, "H": manual adjustment (fixed at "L" in this set)
O Not used (open)
System reset signal input from the reset signal generator (IC202) and SONY bus interface (IC204)
I "L": reset
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
I Main system clock input terminal (8 MHz)
O Main system clock output terminal (8 MHz)
— Ground terminal
O Sub system clock output terminal Not used (open)
I Sub system clock input terminal Not used (fixed at "L")
— Ground terminal (for A/D converter)
I Reference voltage (+5V) input terminal (for A/D converter)
I Selection input of the custom file, D-BASS, etc.
Input of signal for the fine adjustment (linear position sensor adjustment; RV301) of elevator
I
position (A/D input)
I Elevator height position detect input from the RV302 (elevator height sensor) (A/D input)
O Not used (open)
I Serial data transfer clock signal input from the SONY bus interface (IC204)
I Serial data input from the SONY bus interface (IC204)
O Serial data output to the SONY bus interface (IC204)
O Subcode Q data reading clock signal output to the CXD2530Q (IC101)
I Subcode Q data input from the CXD2530Q (IC101)
O Not used (open)
I Not used (fixed at "H")
Magazine eject operation completion detect switch (SW301) input terminal
I
"L": eject completed
Function
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