LC78631 データシートの表示（PDF） - SANYO -> Panasonic

部品番号

コンポーネント説明

メーカー

LC78631

Compact Disk Player DSP

SANYO -> Panasonic 

• 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

LC78631E

Command

OLD 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 = low

q

q

q

When the LC78631E 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 LC78631E detects the beam slip direction from the TES and

HFL inputs. TOFF is used to cut the components in the TES 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 disk 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 disk motor control is in CLV

mode.

No. 5342-14/34

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