SAA7374GP PHILIPS [NXP Semiconductors], SAA7374GP Datasheet - Page 40

• Manufacturer Part Number: SAA7374GP
• Description: Low voltage digital servo processor and Compact Disc decoder CD7LV
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
7.15.4
A list of the servo commands are given in Table 14. It should be noted that these are not fully backwards compatible with
DSIC2.
Table 14 CD7 servo commands
Notes
1. These commands only available when internal decoder interface is enabled.
2. <peak_l> 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.
1998 Feb 26
Write commands
Write_focus_coefs1
Write_focus_coefs2
Write_focus_command
Focus_gain_up
Focus_gain_down
Write_radial coefs
Preset_Latch
Radial_off
Radial_init
Short_jump
Long_jump
Steer_sledge
Preset_init
Write_decoder_reg
Write_parameter
Read commands
Read_Q_subcode
Read_status
Read_hilevel_status
Read_aux_status
Low voltage digital servo processor and
Compact Disc decoder (CD7LV)
COMMANDS
S
UMMARY OF SERVO COMMANDS
(1)(2)
(1)
(3)
CODE
C1H
C1H
C3H
C5H
B1H
D1H
A2H
E0H
17H
27H
33H
42H
62H
57H
81H
93H
70H
F0H
0H
up to 12
BYTES
up to 5
up to 4
up to 3
7
7
3
2
2
7
1
1
1
3
5
1
3
1
2
<foc_parm3> <foc_int> <ramp_incr> <ramp_height>
<ramp_offset> <FE_start> <foc_gain>
<defect_parm> <rad_parm_jump> <vel_parm2> <vel_parm1>
<foc_parm1> <foc_parm2> <CA_drop>
<foc_mask> <foc_stat> <shock_level>
<foc_gain> <foc_parm1>
<foc_gain> <foc_parm1>
<rad_length_lead> <rad_int> <rad_parm_play> <rad_pole_noise>
<rad_gain> <sledge_parm2> <sledge_parm_1>
<chip_init>
‘1CH’
‘3CH’
<tracks_hi> <tracks_lo> <rad_stat>
<brake_dist> <sledge_U_max> <tracks_hi> <tracks_lo>
<rad_stat>
<sledge_level>
<re_offset> <re_gain> <sum_gain>
<decoder_reg_data>
<param_ram_addr> <param_data>
<Q_sub1..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>
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PARAMETERS
Product specification
SAA7374