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

Número de pieza

componentes Descripción

Fabricante

LC78625

Compact Disc Player DSP

SANYO -> Panasonic 

LC78625E

• TJ commands

Code

$A0

$A1

$11

$12

$31

$52

$10

$13

$14

$30

$15

$17

$19

$1A

$39

$5A

$18

$1B

$1C

$38

$1D

$1F

$16

$0F

$8F

$8C

$21

$20

COMMAND

Previous track jump

New track jump

1 TRACK JUMP IN #1

1 TRACK JUMP IN #2

1 TRACK JUMP IN #3

1 TRACK JUMP IN #4

2 TRACK JUMP IN

4 TRACK JUMP IN

16 TRACK JUMP IN

32 TRACK JUMP IN

64 TRACK JUMP IN

128 TRACK JUMP IN

1 TRACK JUMP OUT #1

1 TRACK JUMP OUT #2

1 TRACK JUMP OUT #3

1 TRACK JUMP OUT #4

2 TRACK JUMP OUT

4 TRACK JUMP OUT

16 TRACK JUMP OUT

32 TRACK JUMP OUT

64 TRACK JUMP OUT

128 TRACK JUMP OUT

256 TRACK CHECK

TOFF

TON

TRACK JUMP BRAKE

THLD period TOFF output mode

Reset THLD period TOFF output mode

RES = L

q

q

q

When the LC78625E receives a track jump instruction as a servo command, it first generates accelerating pulses

(period a) and next generates deceleration pulses (period b). The passage of the braking period (period c) completes the

specified jump. During the braking period, the LC78625E detects the beam slip direction from the TES and HFL

inputs. TOFF is used to cut the components in the TE signal that aggravate slip. The jump destination track is captured

by increasing the servo gain with TGL. In THLD period TOFF output mode the TOFF signal is held high during the

period when THLD is high.

Note: Of the modes related to disc motor control, the TOFF pin only goes low in CLV mode, and will be high during

start, stop, and brake operations. Note that the TOFF pin can be turned on and off independently by

microprocessor issued commands. However, this function is only valid when disc motor control is in CLV mode.

No. 5502-17/35

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