saa7824 NXP Semiconductors, saa7824 Datasheet - Page 64

• Manufacturer Part Number: saa7824
• Description: Cd Audio Decoder, Digital Servo And Filterless Dac With Integrated Pre-amp And Laser Control Phonic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 46 brake_dist_max parameter: maximum sledge
Table 47 sledge_Umax parameter: voltage on sledge
Table 48 sledge_level parameter: voltage on sledge
2003 Oct 01
sledge_Umax (decimal)
sledge_level (decimal)
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
brake_dist_max value
(decimal)
distance allowed in fast actuator steered mode;
RAM address 21H
during long jump
when steered
0...127
127
127
....
....
127
128
128
128
0
0
i
i
1
2
1
1
i
i
i
distance allowed in fast
actuator steered mode,
( i + 128)/256
(128
voltage on sledge
(i + 128)/256
voltage on sledge
number of tracks
Maximum sledge
255/256
127/256
128/256
not allowed
i/256
1/256
i/256
0.5
127
128
1
2
1)/256
i
....
....
0
0
16
16
16
V
V
16
16
DD
V
V
DD
V
V
DD
V
DD
DD
DD
DD
V
V
V
DD
DD
DD
64
Table 49 jumpwatchtime parameter: radial jump
Table 50 playwatchtime parameter: radial play watchdog
Table 51 radcontrol parameter: automatic radial servo
radcontrol
0000 0000
0100 0000
0010 0000
0110 0000
jumpwatchtime
playwatchtime
80H to FFH
watchdog readout time difference; RAM
address 57H
maximum time-out; RAM address 54H
switch-off control; RAM address 59H
7FH
80H
81H
82H
00H
7fH
0H
1H
i
i
j
Hex
00
40
20
60
readout time difference
Radial jump watchdog
maximum time-out ms
Radial play watchdog
(i
(j + 80H)
Product specification
i
80H)
servo on play or
switch-off radial
switch-off radial
switch-off radial
radial servo not
error; no action
error; no action
SAA7824
none
0.25
servo on jump
128
influenced by
servo on play
on jump error
ms
0.5
radial servo
on play error
32
64
0.25
Automatic
0
0
1
switch-off
jump error
watchdog
control
0.5
0.5