SAA7824 Datasheet, PDF (55/89 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
7.17.6 SUMMARY OF SERVO COMMANDS
A list of the servo commands is given in Table 26. These are fully compatible with the SAA732X.
Table 26 Servo commands
COMMANDS
Write commands
Write_focus_coefs1
Write_focus_coefs2
Write_focus_command
Focus_gain_up
Focus_gain_down
Write_radial coefs
CODE
17H
27H
33H
42H
62H
57H
Preset_Latch
Radial_off
Radial_init
Short_jump
Long_jump
Steer_sledge
Preset_init
Write_decoder_reg⁽¹⁾
Write_parameter
Read commands
Read_Q_subcode⁽¹⁾⁽²⁾
Read_status
Read_hilevel_status⁽³⁾
Read_aux_status
81H
C1H
C1H
C3H
C5H
B1H
93H
D1H
A2H
0H
70H
E0H
F0H
BYTES
PARAMETERS
7
<foc_parm3> <foc_int> <ramp_incr> <ramp_height>
<ramp_offset> <FE_start> <foc_gain>
7
<defect_parm> <rad_parm_jump> <vel_parm2>
<vel_parm1> <foc_parm1> <foc_parm2> <CA_drop>
3
<foc_mask> <foc_stat> <FFH>
2
<foc_gain> <foc_parm1>
2
<foc_gain> <foc_parm1>
7
<rad_length_lead> <rad_int> <rad_parm_play>
<rad_pole_noise> <rad_gain> <sledge_parm2>
<sledge_parm_1>
1
<chip_init>
1
‘1CH’
1
‘3CH’
3
<tracks_hi> <tracks_lo> <rad_stat>
5
<brake_dist> <sledge_U_max> <tracks_hi>
<tracks_lo> <rad_stat>
1
<sledge_level>
3
<re_offset> <re_gain> <sum_gain>
1
<decoder_reg_data>
2
<param_ram_addr> <param_data>
up to 12
up to 5
up to 4
up to 3
<Q_sub1 to 10> <peak_l> <peak_r>
<foc_stat> <rad_stat> <rad_int_lpf> <tracks_hi>
<tracks_lo>
<intreq> <dec_stat> <seq_stat> <motor_start_time>
<re_offset> <re_gain> <sum_gain>
Notes
1. These commands are only available when the decoder interface is enabled.
2. <peak_I> and <peak_r> bytes are clocked out LSB first.
3. Decoder status flag information in, <dec_stat> is only valid when the internal decoder interface is enabled.
2003 Oct 01
55