Sharp CD-BA300 Service Manual page 46

CD-BA300
IC1 VHiLC78645E-1: CD Servo (LC78645E) (2/2)
Terminal Name Input/Output Setting in Reset
Pin No.
44 RVSS
45 RCHO
46 RVDD
47 XVDD
48 XOUT
49 XIN
50 FSX/16MIN Input/Output
51 XVSS
52* C2F
53* EFLG
54* 16MOUT
55 ASLRCK
56 ASDACK
57 ASDFIN
58* LRSY
59* DATACK
60* DATA
61 CE
62 CL
63 DI
64 DO
65 *WRQ
66 *RES
67 DRF
68 VDD5
69 VSS
70 CONT3 Input/Output
71 CONT2 Input/Output
72* CONT1 Input/Output
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 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 (61pin), CL (62pin), DI (63pin), DO (64pin), WRQ (65pin), RES 66pin), DRF (67pin)
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– –
Right channel
Output LVDD /2
D/A converter
– –
– –
Crystal
Output –
Oscillator
Input –
Input 7.35kHz Synchronization signal monitor port.
or Clock input port for Digital filter & D/A
– – Crystal
Oscillator
Output H C2 FLAG monitor port.
Output L C1, C2 error corrected monitor port.
Output Clock 16.9344MHz output port.
Input –
Input –
Anti-shock
Input –
Output L
Output L Digital data
Output L
Input –
Input – Microcomputer
Input – Interface
Output (H)
Output H
Input – Chip reset signal input port.
This port must be set LOW after first applied power on.
Output L Focus detection output port.
— — Power supply for Microprocessor.
– – GND for digital circuit. Must be connected to 0V.
Input General purpose port 1.
Input General purpose port 2.
Input General purpose port 3.
Output —
Output Input
— —
Input —
— —
Input —
Input — LASER power detected signal input port.
Output — LASER power control signal output port.
Function
GND for Right channel. Must be connected to 0V.
Right channel output.
Power supply for Right channel.
Power supply for crystal oscillator.
Connected for the 33.8688MHz crystal oscillator ciement.
GND for crystal oscillator. Must be connected to 0V.
Word clock input port.
(If this port does not use, must be connect to 0V.)
Bit clock input port.
(If this port does not use, must be connect to 0V.)
Left/Right channel data input port.
(If this port does not use, must be connect to 0V.)
Word clock output port.
Bit clock output port.
Left/Right channel data output port.
Chip enable signal input port.
Data transfer clock input port.
Data input port.
Data output port. (N-ch. open drain output.)
Interruption signal output.
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 connecting to 0V, or set it as the output terminal
and open it.
Internal VCO control phase comparator output port 1.
Internal VCO control phase comparator output port 2.
GND for internal VCO.Must be connected to 0V.
PLL
PDO output current adjustment resistor connection port.
Power supply for internal VCO.
VCO frequency range adjustment port.
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