SAA7324 datasheet(8/68 Pages) PHILIPS

Part #	SAA7324

Description	Digital servo processor and Compact Disc decoder with integrated DAC CD10 II

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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8 / 68 page

2000 Jun 26

8

Philips Semiconductors

Product speciﬁcation

Digital servo processor and Compact Disc

decoder with integrated DAC (CD10 II)

SAA7324

handbook, full pagewidth

SAA7324H

MGS175

1

2

3

4

5

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7

8

9

10

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14

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16

48

47

46

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34

SBSY

SFSY

SUB

RCK

TEST3

STATUS

SILD

RAB

SCL

SDA

SCLI

SDI

WCLI

V2/V3

VSSD1

HFREF

HFIN

ISLICE

VSSA1

VDDA1

Iref

VRIN

D1

D2

D3

D4

R1

R2

VSSA2

CROUT

CRIN

33

RESET

Fig.2 Pin configuration.

7

FUNCTIONAL DESCRIPTION

7.1

Decoder part

7.1.1

PRINCIPAL OPERATING MODES OF THE DECODER

The decoding part supports a full audio specification and

can operate at two different disc speeds, from

single-speed (n = 1) to 4 times speed (n = 4). The factor ‘n’

is called the overspeed factor. A simplified data flow

through the decoder part is illustrated in Fig.7.

7.1.2

DECODING SPEED AND CRYSTAL FREQUENCY

The SAA7324 is a two speed decoding device, with an

internal Phase-Locked Loop (PLL) clock multiplier.

Depending on the crystal frequency used and the internal

clock settings (selectable via decoder register B), the

playback speeds shown in Table 1 are possible, where ‘n’

is the overspeed factor (1, 2 or 4).

An internal clock multiplier is present, controlled by

SELPLL, and should only be used if a 8.4672 or

16.9344 MHz crystal, ceramic resonator or external clock

is present.

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