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7-14.
IC PIN FUNCTION DESCRIPTION
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MAIN BOARD IC201 CXP84332-208Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1 to 3
—
O
Not used (open)
4
CH.F
O
Motor drive signal (load chucking direction) output to the chucking motor drive (IC52)
“L” active *1
5
CH.R
O
Motor drive signal (save direction) output to the chucking motor drive (IC52)
“L” active *1
6
LOAD2
I
Chucking end detect switch (SW11) input terminal
“L”: When completion of the disc chucking operation
7
LOAD1
I
Save end detect switch (SW12) input terminal
“L”: When completion of the disc chucking operation
8
SENS2
I
Internal status signal (sense signal) input from the CXA1992BR (IC11)
9
LIM.SW
I
Sled limit in detect switch (SW1) input terminal
“L”: When the optical pick-up is inner position
10
EE.INIT
I
Initialize signal input for the EEPROM (IC202) “H”: format Fixed at “L” in this set
11
EE.CLK
O
Serial data transfer clock signal output to the EEPROM (IC202)
12
EE.DATA
I/O
Two-way data bus with the EEPROM (IC202)
13 to 19
—
O
Not used (open)
20
SINGLE
I
Setting terminal for the single disc/multiple discs mode
“L”: single mode, “H”: multiple discs mode (fixed at “H”)
21
XRST
O
System reset signal output to the CXA1992BR (IC11), CXD2530Q (IC101) and CXD2522Q
(IC401) “L”: reset
22
FOK
I
Focus OK signal input from the CXA1992BR (IC11) “L”: NG, “H”: OK
23
SENS
I
Internal status signal (sense signal) input from the CXD2530Q (IC101)
24
GFS
I
Guard frame sync signal input from the CXD2530Q (IC101) “L”: NG, “H”: OK
25
GRSRT
O
Reset signal output to the CXD2522Q (IC401) “L”: reset
26
XQOK
O
Subcode Q OK pulse signal output to the CXD2522Q (IC401) “L” active
27
SDTI
I
ESP status signal input from the CXD2522Q (IC401)
28
XSOE
O
ESP status read enable signal output to the CXD2522Q (IC401) “L” active
29
ESPXLT
O
ESP latch pulse signal output to the CXD2522Q (IC401) “L” active
30
RST
I
System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC304)
“L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
31
EXTAL
I
Main system clock input terminal (8 MHz)
32
XTAL
O
Main system clock output terminal (8 MHz)
33
VSS
—
Ground terminal
34
TX
O
Sub system clock output terminal Not used (open)
35
TEX
I
Sub system clock input terminal Not used (fixed at “L”)
36
AVSS
—
Ground terminal (for A/D converter)
37
AVREF
I
Reference voltage (+5V) input terminal (for A/D converter)
38
MCK
I
Input of signal for the fine adjustment (linear position sensor adjustment; RV201) of elevator
position (A/D input)
39
EHS
I
Elevator height position detect input from the RV202 (elevator height sensor) (A/D input)
40
H.TEMP
I
High temperature sensor input terminal Not used (fixed at “L”)
41
XRDE
O
D-RAM read enable signal output to the CXD2522Q (IC401) “L” active
42
XWRE
O
D-RAM write enable signal output to the CXD2522Q (IC401) “L” active
43
A.MUTE
O
Audio line muting on/off control signal output terminal “H”: muting on
44
EMP
O
Emphasis mode output to the D/A converter (IC601) “H”: emphasis on
45
ML
O
Fast speed dubbing control signal output to the D/A converter (IC601) “L”: fast speed
46
GRSCOR
I
Subcode sync (S0+S1) detection signal input from the CXD2522Q (IC401)
