SAA7824 Datasheet, PDF(63/89 Page) NXP Semiconductors – CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)

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SAA7824 Datasheet, PDF (63/89 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 ï¬lterless

DAC with integrated pre-amp and laser control

Product speciï¬cation

SAA7824

Table 43 sledge_pulse2 parameter: sledge pulse height;

RAM address 64H

sledge_pulse2

Hex

0111 1111

78

....

....

0100 0000

40

a

0000 0000

00

....

....

1000 0000

80

Pulse height

full-scale,

positive

half-scale,

positive

level = a/7F,

positive

zero

full-scale,

negative

Table 44 vel_parm1 parameter: gain constant for short

jump, integrator cross-over frequency during

jump; RAM address 1FH

vel_parm1

vel_prop

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_int

xxxx 0000

xxxx 0001

xxxx 0010

Gain constant

Hex

for short jump

Kv

0x

0.1875

8x

0.4375

4x

0.6875

Cx

0.9375

2x

1.1875

Ax

1.4375

6x

1.6875

Ex

1.9375

1x

2.1875

9x

2.4375

5x

2.6875

Dx

2.9375

3x

3.1875

Bx

3.4375

7x

3.6875

Fx

3.9375

Integrator

cross-over

frequency

during jump f0

x0

integrator hold

x1

10.0/Kv

x2

20.0/Kv

vel_parm1

vel_prop

xxxx 0011

i

xxxx 1111

Gain constant

Hex

for short jump

Kv

x3

30.0/Kv

i Ã 10.0/Kv

xF

150.0/Kv

Table 45 vel_parm2 parameter: time constant during

sledge access/actuator access, minimum jump

speed during short jump; RAM address 32H

vel_parm2

vel_setp

(binary)

Hex

Deceleration

time fast

actuator

steered ms

Deceleration

time sledge

steered ms

0000 xxxx

0x

7.5

7.5

1000 xxxx

8x

8.2

8.2

0100 xxxx

4x

9

9

1100 xxxx

Cx

9.7

9.7

0010 xxxx

2x

10.5

10.5

1010 xxxx

Ax

11.2

11.2

0110 xxxx

6x

12.5

12.5

1110 xxxx

Ex

14

14

0001 xxxx

1x

15.5

15.5

1001 xxxx

9x

16.5

16.5

0101 xxxx

5x

20.7

20.7

1101 xxxx

Dx

25

25

0011 xxxx

3x

31.2

31.2

1011 xxxx

Bx

41

41

0111 xxxx

7x

63

63

1111 xxxx

Fx

128

128

vel_min

V1 minimum jump speed

kHz

xxxx 0000

x0

0.0

xxxx 0001

x1

1.0

xxxx 0010

x2

2.0

xxxx 0011

x3

3.0

xxxx 0100

x4

4.0

xxxx 0101

x5

5.0

xxxx 0110

x6

6.0

xxxx 0111

x7

7.0

xxxx 1xxx

undeï¬ned

2003 Oct 01

63

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