SAA7824 Datasheet, PDF (65/89 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
Table 52 hold_mult parameter: velocity proportional part
during long jump, sledge gain in steered sledge
mode; RAM address 49H
hold_mult
vel_prop1
(binary)
0000 xxxx
1000 xxxx
0100 xxxx
1100 xxxx
0010 xxxx
1010 xxxx
0110 xxxx
1110 xxxx
0001 xxxx
1001 xxxx
0101 xxxx
1101 xxxx
0011 xxxx
1011 xxxx
0111 xxxx
1111 xxxx
vel_prop2
xxxx x000
xxxx x001
xxxx x010
xxxx x011
xxxx x100
xxxx x101
xxxx x110
xxxx x111
Velocity
Hex
proportional
part during long
jump K_p
0x
0
8x
0.015625
4x
0.031250
Cx
0.046875
2x
0.062500
Ax
0.078125
6x
0.093750
Ex
0.109375
1x
0.125000
9x
0.140625
5x
0.156250
Dx
0.171875
3x
0.187500
Bx
0.203125
7x
0.218750
Fx
0.234375
Sledge gain in
steered mode
G_S
x0
2
x1
3
x2
4
x3
6
x4
8
x5
12
x6
16
x7
24
Table 53 speed_threshold parameter: maximum sledge
speed allowed in fast actuator steered mode;
RAM address 48H
speed_threshold value
(decimal)
0...127
−1
−2
−3...−127
−128
−64
Maximum sledge speed
allowed in fast actuator
steered mode, number of
tracks (x 1000 tracks/sec)
not allowed
1
2
3...127
128
reset value
Table 54 sledge_long_brake parameter: maximum
sledge distance allowed in sledge steered
mode; RAM address 58H
sledge_long_brake
(decimal)
−1...−128
1
2
3...62
63
−1
Maximum sledge
distance allowed in
sledge steered mode,
number of tracks
test always true
1 × 128
2 × 128
3 × 128...62 × 128
63 × 128
reset value
2003 Oct 01
65