SAA7824 datasheet(55/89 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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55 / 89 page

2003 Oct 01

55

Philips Semiconductors

Product speciﬁcation

CD audio decoder, digital servo and ﬁlterless

DAC with integrated pre-amp and laser control

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

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.

COMMANDS

CODE

BYTES

PARAMETERS

Write commands

Write_focus_coefs1

17H

7

<foc_parm3> <foc_int> <ramp_incr> <ramp_height>

<ramp_offset> <FE_start> <foc_gain>

Write_focus_coefs2

27H

7

<defect_parm> <rad_parm_jump> <vel_parm2>

<vel_parm1> <foc_parm1> <foc_parm2> <CA_drop>

Write_focus_command

33H

3

<foc_mask> <foc_stat> <FFH>

Focus_gain_up

42H

2

<foc_gain> <foc_parm1>

Focus_gain_down

62H

2

<foc_gain> <foc_parm1>

Write_radial coefs

57H

7

<rad_length_lead> <rad_int> <rad_parm_play>

<rad_pole_noise> <rad_gain> <sledge_parm2>

<sledge_parm_1>

Preset_Latch

81H

1

<chip_init>

Radial_off

C1H

1

‘1CH’

Radial_init

C1H

1

‘3CH’

Short_jump

C3H

3

<tracks_hi> <tracks_lo> <rad_stat>

Long_jump

C5H

5

<brake_dist> <sledge_U_max> <tracks_hi>

<tracks_lo> <rad_stat>

Steer_sledge

B1H

1

<sledge_level>

Preset_init

93H

3

<re_offset> <re_gain> <sum_gain>

Write_decoder_reg(1)

D1H

1

<decoder_reg_data>

Write_parameter

A2H

2

<param_ram_addr> <param_data>

Read commands

Read_Q_subcode(1)(2)

0H

up to 12

<Q_sub1 to 10> <peak_l> <peak_r>

Read_status

70H

up to 5

<foc_stat> <rad_stat> <rad_int_lpf> <tracks_hi>

<tracks_lo>

Read_hilevel_status(3)

E0H

up to 4

Read_aux_status

F0H

up to 3

<re_offset> <re_gain> <sum_gain>

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