SAA7327 Просмотр технического описания (PDF) - Philips Electronics

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SAA7327

Digital servo processor and Compact Disc decoder with integrated DAC for video CD (CD7 II)

Philips Electronics 

Philips Semiconductors

Digital servo processor and Compact Disc decoder

with integrated DAC for video CD (CD7 II)

Product specification

SAA7327

1 FEATURES

• Integrated bitstream DAC with differential outputs,

operating at 96fs with 3rd order noise shaper; typical

performance of −95 dB signal-to-noise ratio (EIAJ

A-weighted)

• Separate serial input and output interfaces allow data

‘loopback’ mode for use of onboard DAC as stand-alone

DAC for digital audio signals

• Up to 2 times speed mode

• Lock-to-disc mode

• Full error correction strategy, t = 2 and e = 4

• Full subcode (CD graphics) interface

• All standard decoder functions implemented digitally on

chip

• FIFO overflow concealment for rotational shock

resistance

• Digital audio interface (EBU), audio and data

• 2 and 4 times oversampling integrated digital filter,

including fs mode

• Audio data peak level detection

• Kill interface for external DAC deactivation during digital

silence

• All SAA737x (CD7) digital servo and high-level functions

• Low focus noise

• Improved playability performance

• Automatic closed-loop gain control available for focus

and radial loops

• Pulsed sledge support

• Electronic damping of fast radial actuator during long

jump

• Microcontroller loading LOW

• High-level servo control option

• High-level mechanism monitor

• Communication may be via TDA1301/SAA7345

compatible bus or I2C-bus

• On-chip clock multiplier allows the use of 8.4672,

16.9344 or 33.8688 MHz crystals or ceramic

resonators.

2 GENERAL DESCRIPTION

The SAA7327 (CD7 II) is a single chip combining the

functions of a CD decoder, digital servo and bitstream

DAC, especially designed for Video CD applications.

The decoder/servo part is based on the SAA737x (CD7)

and is software compatible with this design. Extra

functions are controlled by use of ‘shadow’ registers

(see Section 7.15.3).

Supply of this Compact Disc IC does not convey an

implied license under any patent right to use this IC in any

Compact Disc application.

3 ORDERING INFORMATION

TYPE

NUMBER

SAA7327H

NAME

QFP64

PACKAGE

DESCRIPTION

plastic quad flat package; 64 leads (lead length 1.6 mm);

body 14 × 14 × 2.7 mm

VERSION

SOT393-1

1999 Jun 17

3

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