LC78621E Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LC78621E

Compact Disc Player DSP

SANYO -> Panasonic 

LC78621E

Note: 1. If focus is lost during the execution of an internal brake command, the pickup must first be refocussed

and then the internal brake command must be reissued.

2. Since incorrect deceleration state determination is possible depending on the EFM signal playback state

(e.g., disk defects, access in progress), we recommend using these functions in combination with a

microprocessor.

8. Track Jump Circuit; Pin 19: HFL, pin 20: TES, pin 23: TOFF, pin 24: TGL, pin 25: THLD, pin 28: JP+, pin 29: JP–

• The LC78621E supports the two track count modes listed below.

MSB

LSB

00100010

00100011

Command

NEW TRACK COUNT (using the TES/HFL combination)

STANDARD TRACK COUNT (directly counts the TES signal)

RES = low

q

The earlier track count function uses the TES signal directly as the internal track counter clock.

To reduce counting errors resulting from noise on the rising and falling edges of the TES signal, the new track

count function prevents noise induced errors by using the combination of the TES and HFL signals, and

implements a more reliable track count function. However, dirt and scratches on the disk can result in HFL signal

dropouts that may result in missing track count pulses. Thus care is required when using this function.

No. 5223-15/34

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