MN662785TBUC 参数 Datasheet PDF下载

LSI 6 for C 5T pa C

MNs 6278omBUct Disc/CD-RO M Player

MN662785TBUC

1. TYPE

Signal processing integrated circuit for CDs (Compact Discs)

2. OVERVIEW

MN662785TBUC is a signal processing IC for CDs. It incorporates optical servo (focus, tracking,

and traverse servos) processing function, digital signal processing function (EFM demodulation and

error correction), digital servo processing function for spindle motor, anti-shock memory control

function for 16M, 4M, or 1M DRAM in compression or decompression mode available to disc

rotation synchronous playback (jitter-free), a digital filter, and D/A converter. All the processing

functions after the head amplifier (RF amplifier) are incorporated into a single chip.

             

3. FUNCTIONS AND FEATURES

(Optical servo)

・F

ocus (Fo), tracking (Tr), and traverse (TRV) servos

・A

utomatic adjustment functions (Fo/Tr gain, Fo/Tr offset, Fo/Tr balance)

・

On-chip PWM for drive output

・P

rovided with a countermeasure for dropout

・

Provided with anti-shock function

・P

rovided with track cross detection function

                             

(Digital signal processing)

・C

ontaining DSL and PLL

・P

rovided with a frame synchronous detection/protection/interpolation

・

Subcode data processing

Q-data CRC check

On-chip Q-data register

On-chip CD-TEXT-data register

・C

IRC error correction

C1 decoder：double error correction 

  

C2 decoder：triple error correction

On-chip de-interleaving 16K RAM

・A

udio data interpolation processing

4-sampling linear interpolation and previous value hold

・S

oft muting

・D

igital attenuation (256 levels) (-∞, -48 dB to 0 dB, 256 levels)

・S

oft attenuation (256 levels) (-∞, -48 dB to 0 dB, 256 levels)

・D

igital audio interface (EIAJ format), IEC format

・C

ompatible with digital audio interface when anti-shock memory control is turned on.

・C

ompatible with bilingual operation when anti-shock memory control is turned on.

(Spindle motor servo)

・C

LV digital servo

・P

rovided with servo gain selection function

・P

rovided with shaft loss compensation setting function

・P

rovided with forced acceleration/deceleration output level setting function

Public ation date: J une 2002

SDD00026AEM

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