LC78625 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LC78625

Compact Disc Player DSP

SANYO -> Panasonic 

LC78625E

• Tracking brake

The chart shows the relationships between the TES, HFL, and TOFF signals during the track jump C period. The TOFF

signal is extracted from the HFL signal by TES signal edges. When the HFL signal is high, the pickup is over the

mirror surface, and when low, the pickup is over data bits. Thus braking is applied based on the TOFF signal being

high when the pickup is moving from a mirror region to a data region and being low when the pickup is moving from a

data region to a mirror region.

• JP three-value output

Code

$B6

$B7

COMMAND

JP three-value output

JP two-value output (earlier scheme)

RES = L

q

The JP three value output command allows the track jump operation to be controlled from a single pin. However, the

kick gain is 6 dB lower when this pin is used, so applications must increase the gain in the servo system.

• Track check mode

Code

$F0

$F8

$FF

COMMAND

Track check in

Track check out

Two-byte command reset

RES = L

q

The LC78625E will count the specified number of tracks when the microprocessor sends an arbitrary binary value in

the range 8 to 254 after issuing either a track check in or a track check out command.

No. 5502-19/35

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