SAA7824 Datasheet, PDF (58/89 Pages) NXP Semiconductors – CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)

Philips Semiconductors
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
Product specification
SAA7824
8 SUMMARY OF SERVO COMMAND PARAMETERS
VALUES
Table 28 foc_parm1 parameter: focus end lead
frequency, defect detector, offtrack detector
foc_parm1
foc_pole_lead value
(binary)
xxx1 1100
xxx1 1000
xxx0 0000
xxx0 1000
xxx0 1100
xxx1 1101
xxx1 1001
xxx0 0001
xxx0 1001
xxx0 1101
xxx1 1110
xxx1 1010
xxx0 0010
xxx0 1010
xxx0 1110
xxx1 1111
xxx1 1011
xxx0 0011
xxx0 1011
defect_det_sw
x11x xxxx
x10x xxxx
x00x xxxx
x01x xxxx
otd_select
0xxx xxxx
1xxx xxxx
Focus end lead
frequency f₃ kHz
1.97
2.29
2.61
2.94
3.26
3.90
4.55
5.19
5.82
6.46
7.72
8.98
10.22
11.46
12.69
15.13
17.54
19.93
22.28
Defect detector
defect detector does not
influence focus and radial
focus hold on defect
detector
focus and radial hold on
defect detector
undefined, reserved
Offtrack detector
ON track active 1
ON track active 0
Table 29 foc_parm2 parameter: focus low-pass start
frequency, focusing system
foc_parm2
foc_pole_noise value
(binary)
xxx1 1100
xxx1 1000
xxx0 0000
xxx0 1000
xxx0 1100
xxx1 1101
xxx1 1001
xxx0 0001
xxx0 1001
xxx0 1101
xxx1 1110
xxx1 1010
xxx0 0010
xxx0 1010
xxx0 1110
xxx1 1111
xxx1 1011
xxx0 0011
xxx0 1011
detector_arr
xx1x xxxx
xx0x xxxx
Focus low-pass start
frequency f₄ kHz
3.90
4.55
5.19
5.82
6.46
7.72
8.98
10.22
11.46
12.69
15.13
17.54
19.93
22.28
25.40
30.26
35.08
39.86
44.56
Focusing system
single foucault
double foucault
2003 Oct 01
58