saa7826 NXP Semiconductors, saa7826 Datasheet - Page 56

• Manufacturer Part Number: saa7826
• Description: Cd Audio Decoder, Digital Servo And Filterless Dac With Integrated Pre-amp And Laser Control
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.17.7
Table 27 Servo command parameters
2003 Oct 01
rad_int
rad_gain
rad_parm_jump
vel_parm1
vel_parm2
speed_threshold
hold_mult
brake_dist_max
sledge_long_brake
sledge_Umax
sledge_level
sledge_parm_1
sledge_parm_2
sledge_pulse1
sledge_pulse2
foc_parm_1
foc_parm_2
foc_parm_3
foc_int
foc_gain
CA_drop
ramp_offset
ramp_height
ramp_incr
FE_start
rad_parm_play
rad_pole_noise
rad_length_lead
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
PARAMETER
S
UMMARY OF SERVO COMMAND PARAMETERS
ADDRESS
RAM
1CH
1EH
2AH
1FH
14H
15H
12H
16H
18H
19H
28H
29H
27H
32H
48H
49H
21H
58H
36H
17H
46H
64H
pulsed sledge
pulsed sledge
focus ramp
focus ramp
focus ramp
focus ramp
radial jump
radial jump
radial jump
radial jump
radial jump
radial jump
radial jump
AFFECTS
radial PID
radial PID
radial PID
radial PID
radial PID
focus PID
focus PID
focus PID
focus PID
focus PID
focus PID
sledge
sledge
sledge
sledge
56
POR VALUE
FFH
00H
70H
70H
end of focus lead
defect detector enabling
focus low-pass
focus error normalizing
focus lead length
minimum light level
focus integrator crossover frequency
focus PID loop gain
sensitivity of dropout detector
asymmetry of focus ramp
peak-to-peak value of ramp voltage
slope of ramp voltage
minimum value of focus error
end of radial lead
radial low-pass
length of radial lead
radial integrator crossover frequency
radial loop gain
filter during jump
PI controller crossover frequencies
jump pre-defined profile
maximum speed in fastrad mode
electronic damping
sledge bandwidth during jump
maximum sledge distance allowed in
fast actuator steered mode; the value
of brake_dist_max must be negative
and is irrespective of the direction of
jump
brake distance of sledge
voltage on sledge during long jump
voltage on sledge when steered
sledge integrator crossover frequency
sledge low-pass frequencies
sledge gain
sledge operation mode
pulse width
pulse height
DETERMINES
Product specification
SAA7826