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LC78625 Arkusz danych(PDF) 28 Page - Sanyo Semicon Device

Numer części LC78625
Szczegółowy opis  Compact Disc Player DSP
Download  35 Pages
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Producent  SANYO [Sanyo Semicon Device]
Strona internetowa  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LC78625 Arkusz danych(HTML) 28 Page - Sanyo Semicon Device

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LC78625E
24. CONT pin; Pin 73: CONT
The CONT pin goes high when a CONT SET command is issued.
The clock that is used as the time base is generated by connecting a 16.9344 MHz oscillator element between these
pins. The OSC OFF command turns off both the VCO and crystal oscillators. Double-speed playback can be
specified by microprocessor command.
• Connect a 16.9344 MHz oscillator element between the XIN (pin 77) and XOUT (pin 78) pins for double-speed
systems. The playback speed can be set by the normal-speed playback and double-speed playback commands.
• Recommended crystal and ceramic oscillator elements
Since the conditions for the load capacitors Cin and Cout used vary with the printed circuit board, this circuit must be
tested on the printed circuit board actually used.
26. 16M and 4.2M pins; Pin 71: 16M, pin 72: 4.2M
In normal- and double-speed playback modes, the 16M pin buffer outputs the 16.9344 MHz external crystal oscillator
16.9344 MHz signal. The 4.2M pin supplies an LA9230/40 Series LSI system clock, continuously outputting a
4.2336 MHz signal. When the oscillator is turned off both these pins will be fixed at either high or low.
Code
COMMAND
RES = L
$0E
CONT Set
L
$8B
CONT and CD-ROM XA reset
q
q
25. Clock oscillator; Pin 77: XIN, pin 78: XOUT
Code
COMMAND
RES = L
$8E
OSC ON
q
q
$8D
OSC OFF
$CE
XTAL 16M
q
q
$C2
Normal-speed playback
q
q
$C1
Double-speed playback
Manufacturer
Product No.
Load capacitance
Damping resistor
Cin/Cout (Cin = Cout)
Rd
Citizen Watch Co., Ltd.
CSA-309 (16.9344 MHz)
6 pF to 10 pF (±10%)
0
(crystal oscillator elements)
TDK, Ltd.
FCR 16.93M2G (16.93 MHz)
15 pF (±10%)
100
Ω (±10%)
(ceramic oscillator elements)
FCR 16.93MCG (16.93 MHz)
30 pF (Built-in capacitor type)
47
Ω (±10%)


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