Sharp CD-BA250H Service Manual page 39

CD-BA250H/CD-BA2600H
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
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
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 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 (VDD5 V) for a microcomputer interface :
CE (61pin), CL (62pin), DI (63pin), DO (64pin), WRQ (65pin), RES (66pin), DRF (67pin), CONT2 (71pin), CONT3 (70pin).
– –
Output LVDD /2
Input –
Input –
Output –
Input –
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 —
GND for Right channel. Must be connected to 0 V.
Right channel
Right channel output.
D/A converter
Power supply for Right channel.
Power supply for crystal oscillator.
Crystal
Connected for the 33.8688 MHz crystal oscillator cement.
Oscillator
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.
Microcomputer Data transfer clock input port.
Interface Data input port.
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.
Power supply for Microprocessor.
GND for digital circuit. Must be connected to 0 V.
General purpose port 1.
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
General purpose port 2.
it by connecting to 0 V, or set it as the output terminal
and open it.
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.
– 46 –
Function