LC78626E Datasheet, PDF (25/32 Pages) Sanyo Semicon Device – DSP for Compact Disk Players

LC78626E
Single-byte data + $DB
PORT I/O SET
dn = 1: Set CONTn to be an output pin
dn = 0: Set CONTn to be an input pin.
Where n = 2 to 5
The ports that are set to output pins then they can independently output either high or low levels. The lower four bits
of the single byte of data correspond to the respective ports. Starting with the least significant bit of this single byte of
data, the bits correspond to CONT2, CONT3, CONT4, and CONT5. The command uses a two-byte command format
(RWC1 set).
Single-byte data + $DC
PORT OUTPUT
dn = 1: Outputs a high level from the CONTn that is set to being an output
dn = 0: Outputs a low level from the CONTn that is set to being an output
20 The Clock Oscillator Pin 60: XIN, Pin 59: XOUT
Code
$8E
$8D
$CE
$C2
$C1
COMMAND
OSC ON
OSC OFF
XTAL 16M
Normal speed playback
Double speed playback
RES = low
q
q
q
By connecting a 16.9344 MHz oscillator to these pins a clock is generated that serves as the time base.
The OSC OFF command is a command to stop the oscillation of the oscillator and the VCO oscillation. Moreover,
depending on the command, double speed playback is also possible.
Oscillator
(C1)
(C2)
(1) When structuring a double speed playback system, connect a 16.9344 MHz oscillator between the XIN (Pin 60) and
the XOUT (Pin 59), and set the playback speed using the double speed playback command.
(2) Recommended crystal/ceramic oscillator constants.
Manufacturer
Product No.
CITIZEN WATCH CO., LTD.
(Crystal Oscillator)
CSA-309 (16.9344 MHz)
TDK, Ltd.
FCR 16.93M2G (16.93 MHz)
(Ceramic oscillator)
FCR 16.93MCG (16.93 MHz)
Load Capacitance
C1/C2 (C1 = C2)
6 pF to 10 pF (±10%)
15 pF (±10%)
30 pF (Internal type)
Dumping Resistance
Rd
0Ω
100Ω (±10%)
47Ω (±10%)
The load capacitance Cin and Cout will have different requirements depending on the actual print circuit board used,
and thus it is necessary to perform verification testing on the use print circuit board. Consult the oscillator
manufacturer.
21 The 16M and 4.2M Pins Pin 41: 16M, Pin 42: 4.2M
When using double speed/normal speed playback mode, a 16.9344 MHz signal will be output from the 16M pin after
the external crystal oscillator 16.9344 MHz. A 4.2336 MHz will be output constantly from the 4.2M pin, forming a
LA9230/40 Series LSI system clock. When OSC is OFF, both terminals are constantly either high or low.
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