– 49 –
CD-BA1500H
IC2 VHiLC78641E-1: Servo/Signal Control (LC78641E) (2/2)
44
LVDD
–
–
L channel
Power terminal for L channel.
45
LCHO
Output
1/2VDD
D/A converter
L channel output terminal.
46
LVSS
–
–
Ground terminal for L channel. Surely connected to 0V.
47
RVSS
–
–
R channel
Ground terminal for R channel. Surely connected to 0V.
48
RCHO
OUTPUT
1/2VDD
D/A converter
R channel output terminal.
49
RVDD
–
–
Power terminal for R channel.
50
XVDD
–
–
For quartz
Power terminal for quartz oscillation.
51
XIN
Input
Oscillation
oscillation
Ground terminal of 16.9344MHz quartz oscillation.
52
XOUT
Output
Oscillation
53
XVSS
–
–
Ground terminal for quartz oscillation. Surely connected to 0V.
54
ASLRCK
Input
–
For anti
L/R clock input terminal. (When not used,connect to 0V)
55
ASDACK
Input
–
shock mode
Bit clock input terminal. (When not used,connect to 0V)
56
ASDFIN
Input
–
L/R channel data input terminal. (When not used,connect to 0V)
57*
LRSY
Output
L
For digital
L/R clock output terminal.
58*
DATACK
Output
L
data output
Bit clock output terminal.
59*
DATA
Output
L
L/R channel data output terminal.
60*
16M
Output
Clock output
16.9344MHz output terminal.
61*
SFSY
Output
L
Output terminal of synchronous signal of subcode frame.
It drops when subcode stand by.
62*
SBSY
Output
L
Output terminal of synchronous signal of subcode block.
63*
PW
Output
L
Output terminal of subcodes P,A,R,S,T,U and W.
64
SBCK
Input
–
Clock input terminal to read subcode. (When not used,connect to 0V)
65
CE
Input
–
For
Chip enable signal input terminal.
66
CL
Input
–
microcomputer
Data transmission clock input terminal.
67
DI
Input
–
interface
Data input terminal.
68
DO
Output
L
Data output terminal.
69
INT
Output
H
Interruption signal output terminal.
70
WRQ
Output
H
Interruption signal output terminal.
71
RES
Input
–
Reset input terminal of LC78640. When turning on power, set it at "L".
72
DRF
Output
L
Focus ON detection terminal.
73
VDD5V
–
–
Power terminal for microcomputer interface.
74
VSS
–
–
Ground terminal of digital system. Surely connected to 0V.
75
CONT6
In/Output
Input mode
General purpose input/output terminal 6.
Controlled with serial data command
from microcomputer. When not used,
76
CONT7
In/Output
Input mode
General purpose input/output terminal 7.
set it as the input terminal and
open it by connecting to 0V, or set it
as the output terminal and open it.
77*
V/ *P
Output
H
Monitor output terminal for automatic switch of rough servo/phase control.
"H" for rough servo, and "L" for phase servo.
78*
FSEQ
Output
L
Output terminal synchronous signal detection. "H" is output when synchronous signal
detected by EFM signal matches synchronous signal internally generated.
79*
DEFECT
In/Output
Input mode
Defect terminal. After resetting, it is configured as an input terminal. It can be controlled
from the outside. It also becomes a defect monitor terminal under command control
80*
EFMO
Output
Unfixed
EFM signal output terminal.
Pin No.
Function
Terminal Name Input/Output Setting in Reset
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)
