Sharp CD-BA150 Service Manual page 41

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IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (2/2)
Terminal Name Input/Output Setting in Reset
Pin No.
44
LVDD
45
LCHO
46
LVSS
47
RVSS
48
RCHO
49
RVDD
50
XVDD
51
XIN
52
XOUT
53
XVSS
54
ASLRCK
55
ASDACK
56
ASDFIN
57*
LRSY
58*
DATACK
59*
DATA
60*
16M
61*
SFSY
62*
SBSY
63*
PW
64
SBCK
65
CE
66
CL
67
DI
68
DO
69
INT
70
WRQ
71
RES
72
DRF
73
VDD5V
74
VSS
75
CONT6
76
CONT7
77*
V/ *P
78*
FSEQ
79
DEFECT
80*
EFMO
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Be sure to supply the same potential to each power terminal. (VVDD,ADAVDD,VDD,LVDD,RVDD,XVDD)
Terminal witch is controlled by the power terminal (VDD5V) for a microcomputer interface :
CE (65pin), CL (66pin), DI (67pin), DO (68pin), INT (69pin), WRQ (70pin), RES (71pin), DRF (72pin),
CONT6 (75pin), CONT7 (76pin)
Output
1/2VDD
D/A converter L channel output terminal.
R channel
OUTPUT
1/2VDD
D/A converter R channel output terminal.
For quartz
Input
Oscillation
Output
Oscillation
Input
Input
shock mode
Input
Output
L
Output
L
data output
Output
L
Output
Clock output
16.9344MHz output terminal.
Output
L
Output terminal of synchronous signal of subcode frame.
It drops when subcode stand by.
Output
L
Output terminal of synchronous signal of subcode block.
Output
L
Output terminal of subcodes P,A,R,S,T,U and W.
Input
Clock input terminal to read subcode. (When not used,connect to 0V)
Input
Input
microcomputer
Input
Output
L
Output
H
Output
H
Input
Reset input terminal of LC78640. When turning on power, set it at "L".
Output
L
Focus ON detection terminal.
Power terminal for microcomputer interface.
Ground terminal of digital system. Surely connected to 0V.
In/Output
Input mode
General purpose input/output terminal 6.
In/Output
Input mode
General purpose input/output terminal 7.
Output
H
Monitor output terminal for automatic switch of rough servo/phase control.
"H" for rough servo, and "L" for phase servo.
Output
L
Output terminal synchronous signal detection. "H" is output when synchronous signal
detected by EFM signal matches synchronous signal internally generated.
In/Output
Input mode
Defect terminal. After resetting, it is configured as an input terminal. It can be controlled
Output
Unfixed
EFM signal output terminal.
L channel
Power terminal for L channel.
Ground terminal for L channel. Surely connected to 0V.
Ground terminal for R channel. Surely connected to 0V.
Power terminal for R channel.
Power terminal for quartz oscillation.
oscillation
Ground terminal of 16.9344MHz quartz oscillation.
Ground terminal for quartz oscillation. Surely connected to 0V.
For anti
L/R clock input terminal. (When not used,connect to 0V)
Bit clock input terminal. (When not used,connect to 0V)
L/R channel data input terminal. (When not used,connect to 0V)
For digital
L/R clock output terminal.
Bit clock output terminal.
L/R channel data output terminal.
For
Chip enable signal input terminal.
Data transmission clock input terminal.
interface
Data input terminal.
Data output terminal.
Interruption signal output terminal.
Interruption signal output terminal.
from the outside. It also becomes a defect monitor terminal under command control
– 41 –
CD-BA150
Function
Controlled with serial data command
from microcomputer. When not used,
set it as the input terminal and
open it by connecting to 0V, or set it
as the output terminal and open it.

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