Sharp SD-EX220H Service Manual page 43

SD-EX220H
IC1 VHiLC78646E-1: CD Servo (LC78646E) (2/2)
Pin No. Terminal Name
50 FSX/16MIN
51 XVSS
52* C2F
53* EFLG
54 16MOUT
55 ASLRCK
56 ASDACK
57 ASDFIN
58 LRCK
59 BCK
60 DATA
61 CE
62 CL
63 DI
64 DO
65 *WRQ
66 *RES
67 DRF
68 VDD5
69 VSS
70 CONT3
71 CONT2
72 CONT1
73 PDO1
74 PDO2
75 VVSS
76 PCKIST
77 VVDD
78 FR
79 LDS
80 LDD
In this unit, the terminal with asterisk mark (*) is (open) terminal whitch 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 (VDD5 V) for a microcomputer interface :
CE (61 pin), CL (62 pin), DI (63 pin), DO (64 pin), WRQ (65 pin), RES (66 pin), DRF (67 pin)
Input/Output Setting in Reset
Input/Output Input
— —
Output H
Output L
Output Clock
Input —
Input —
Input —
Output L
Output L
Output L
Input —
Input —
Input —
Output (H)
Output H
Input —
Output L
Input —
— —
Input/Output Input
Input/Output Input
Input/Output Input
Output —
Output Input
— —
Input —
Input —
Input —
Input —
Output —
7.35 kHz Synchronization signal monitor port.
or Clock input port for Digital filter & D/A
Crystal GND for crystal oscillator. Must be connected to 0 V.
Oscillator
C2 FLAG monitor port.
C1, C2 error corrected monitor port.
16.9344 MHz output port.
Word clock input port.
(If this port does not use, must be connect to 0 V.)
Bit clock input port.
Anti-shock
(If this port does not use, must be connect to 0 V.)
Left/Right channel data input port.
(If this port does not use, must be connect to 0 V.)
Word clock output port.
Digital data Bit clock output port.
Left/Right channel data output port.
Chip enable signal input port.
Data transfer clock input port.
Microcomputer
Data input port.
Interface
Data output port. (N-ch. open drain output.)
Interruption signal output.
Chip reset signal input port.
This port must be set LOW after first applied power on.
Focus detection output port.
Focus detection output port.
GND for digital circuit. Must be connected to 0 V.
General purpose port 1.
General purpose port 2.
General purpose port 3.
Internal VCO control phase comparator output port 1.
Internal VCO control phase comparator output port 2.
GND for internal VCO. Must be connected to 0 V.
PLL
PDO output current adjustment resistor connection port.
Power supply for internal VCO.
VCO frequency range adjustment port.
LASER power detected signal input port.
LASER power control signal output port.
8 – 2
Function
Controlled with serial data command from micro-
computer. When not used, General purpose
input/output terminal 7.
Set it as the input terminal and open it by con-
necting to 0 V, or set it as the output terminal and
open it.