Ic Pin Function Description - Sony CDX-737 Service Manual

7-13. IC PIN FUNCTION DESCRIPTION

• MAIN BOARD IC201 CXP84332-210Q (SYSTEM CONTROLLER)
Pin No. Pin Name
1 to 3 —
4 CH.F
5 CH.R
6 LOAD2
7 LOAD1
8 SENS2
9 LIM.SW
10 EE.INIT
11 EE.CLK
12 EE.DATA
13 to 19 —
20 SINGLE
21 XRST
22 FOK
23 SENS
24 GFS
25 GRSRT
26 XQOK
27 SDTI
28 XSOE
29 ESPXLT
30 RST
31 EXTAL
32 XTAL
33 VSS
34 TX
35 TEX
36 AVSS
37 AVREF
38 MCK
39 EHS
40 MODEL
41 XRDE
42 XWRE
43 A.MUTE
44 EMP
45 ML
46 GRSCOR
I/O
O Not used (open)
Motor drive signal (load chucking direction) output to the chucking motor drive (IC52)
O
"L" active *1
Motor drive signal (save direction) output to the chucking motor drive (IC52)
O
"L" active *1
Chucking end detect switch (SW11) input terminal
I
"L": When completion of the disc chucking operation
Save end detect switch (SW12) input terminal
I
"L": When completion of the disc chucking operation
I Internal status signal (sense signal) input from the CXA1992BR (IC11)
Sled limit in detect switch (SW1) input terminal
I
"L": When the optical pick-up is inner position
I Initialize signal input for the EEPROM (IC202) "H": format Fixed at "L" in this set
O Serial data transfer clock signal output to the EEPROM (IC202)
I/O Two-way data bus with the EEPROM (IC202)
O Not used (open)
Setting terminal for the single disc/multiple discs mode
I
"L": single mode, "H": multiple discs mode (fixed at "H")
System reset signal output to the CXA1992BR (IC11), CXD2530Q (IC101) and CXD2522Q
O
(IC401) "L": reset
I Focus OK signal input from the CXA1992BR (IC11) "L": NG, "H": OK
I Internal status signal (sense signal) input from the CXD2530Q (IC101)
I Guard frame sync signal input from the CXD2530Q (IC101) "L": NG, "H": OK
O Reset signal output to the CXD2522Q (IC401) "L": reset
O Subcode Q OK pulse signal output to the CXD2522Q (IC401) "L" active
I ESP status signal input from the CXD2522Q (IC401)
O ESP status read enable signal output to the CXD2522Q (IC401) "L" active
O ESP latch pulse signal output to the CXD2522Q (IC401) "L" active
System reset signal input from the SONY bus interface (IC302) and reset signal generator
I (IC304) "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)
Input of signal for the fine adjustment (linear position sensor adjustment; RV201) of elevator
I
position (A/D input)
I Elevator height position detect input from the RV202 (elevator height sensor) (A/D input)
I Setting terminal for the destination (fixed at "H" in this set)
O D-RAM read enable signal output to the CXD2522Q (IC401) "L" active
O D-RAM write enable signal output to the CXD2522Q (IC401) "L" active
O Audio line muting on/off control signal output terminal "H": muting on
O Emphasis mode output to the D/A converter (IC601) "H": emphasis on
O Fast speed dubbing control signal output to the D/A converter (IC601) "L": fast speed
I Subcode sync (S0+S1) detection signal input from the CXD2522Q (IC401)
Description
33