SAA7824 Datasheet, PDF (67/89 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
Table 59 level1, level2 parameter: amplitude of signal
injected into focus/radial AGC; RAM address
level1 = 69H, level2 = 6AH
level1, level2 (decimal)
0
1 to 126
127
128 to 255
Amplitude of injected
signal
0
higher
highest
not allowed
Table 60 osc_inc parameter: focus/radial AGC system
control, oscillator frequency; RAM address 68H
osc_inc
xx00 0000
xx00 0001
xx00 0010
xx00 0011
a
xx11 1111
00xx xxxx
11xx xxxx
01xx xxxx
Oscillator frequency Hz
0
64.6
129.2
193.8
a × 64.6
4069.8
AGC control
AGC system off
focus AGC active
radial AGC active
Table 62 re_gain parameter: initial value setting
re_gain
−128
−127
−i
−1
0
1
i
127
Value
not allowed
1/256
(−i + 128)/256
127/256
128/256
129/256
(i + 128)/256
255/256
Table 63 sum_gain parameter: initial value setting
sum_gain
−128
−127
−i
−1
0
1
i
127
Value
not allowed
1/256
(−i + 128)/256
127/256
128/256
129/256
(i + 128)/256
255/256
Table 61 re_offset parameter: initial value setting
re_offset
127
i
0
−i
−128
Value
128/256
i/256
0
−i/256
−128/256
2003 Oct 01
67