SAA7326 Ver la hoja de datos (PDF) - Philips Electronics

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SAA7326

Digital servo processor and Compact Disc decoder with integrated DAC (CD10)

Philips Electronics 

Philips Semiconductors

Digital servo processor and Compact Disc

decoder with integrated DAC (CD10)

handbook, full pagewidth

Product specification

SAA7326

HFREF 1

HFIN 2

ISLICE 3

VSSA1 4

VDDA1 5

Iref 6

VRIN 7

D1 8

D2 9

D3 10

D4 11

R1 12

R2 13

VSSA2 14

CROUT 15

CRIN 16

SAA7326H

48 SBSY

47 SFSY

46 SUB

45 RCK

44 TEST3

43 STATUS

42 SILD

41 RAB

40 SCL

39 SDA

38 RESET

37 SCLI

36 SDI

35 WCLI

34 V2/V3

33 VSSD1

MGL712

Fig.2 Pin configuration.

7 FUNCTIONAL DESCRIPTION

7.1 Decoder part

7.1.1 PRINCIPAL OPERATIONAL 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 2 times speed (n = 2).

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 SAA7326 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 or 2).

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.

1999 Jun 17

8

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