SAA7824 datasheet(67/89 Pages) PHILIPS

Part #	SAA7824

Description	CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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67 / 89 page

2003 Oct 01

67

Philips Semiconductors

Product speciﬁcation

CD audio decoder, digital servo and ﬁlterless

DAC with integrated pre-amp and laser control

SAA7824

Table 59 level1, level2 parameter: amplitude of signal

injected into focus/radial AGC; RAM address

level1 = 69H, level2 = 6AH

Table 60 osc_inc parameter: focus/radial AGC system

control, oscillator frequency; RAM address 68H

Table 61 re_offset parameter: initial value setting

Table 62 re_gain parameter: initial value setting

Table 63 sum_gain parameter: initial value setting

level1, level2 (decimal)

Amplitude of injected

signal

00

1 to 126

higher

127

highest

128 to 255

not allowed

osc_inc

Oscillator frequency Hz

xx00 0000

0

xx00 0001

64.6

xx00 0010

129.2

xx00 0011

193.8

aa

× 64.6

xx11 1111

4069.8

AGC control

00xx xxxx

AGC system off

11xx xxxx

focus AGC active

01xx xxxx

radial AGC active

re_offset

Value

127

128/256

i

i/256

00

−i

−i/256

−128

−128/256

re_gain

Value

−128

not allowed

−127

1/256

−i(−i + 128)/256

−1

127/256

0

128/256

1

129/256

i

(i + 128)/256

127

255/256

sum_gain

Value

−128

not allowed

−127

1/256

−i(−i + 128)/256

−1

127/256

0

128/256

1

129/256

i

(i + 128)/256

127

255/256

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