CDB43L43 Ver la hoja de datos (PDF) - Cirrus Logic

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componentes Descripción

Fabricante

CDB43L43

Low Voltage, Stereo DAC with Headphone Amp

Cirrus Logic 

CS43L43

5.8 LIMITER ATTACK RATE (ADDRESS 08H) (ARATE)

7

ARATE7

0

6

ARATE6

0

5

ARATE5

0

4

ARATE4

1

3

ARATE3

0

2

ARATE2

0

1

ARATE1

0

0

ARATE0

0

Default = 10h - 2 LRCK’s per 1/8 dB

Function:

The limiter attack rate is user selectable. The rate is a function of sampling frequency, Fs, and the value

in the Limiter Attack Rate register. Rates are calculated using the function RATE = 32/{value}. Where

{value} is the decimal value in the Limiter Attack Rate register and RATE is in LRCK’s per 1/8 dB of

change. NOTE: A value of zero in this register is not recommended, as it will induce erratic behavior of

the limiter. Use the LIM_EN bit to disable the limiter function (see Section 5.10.3).

Binary Code

00000001

00010100

00101000

00111100

01011010

Decimal Value

1

20

40

60

90

LRCK’s per 1/8 dB

32

1.6

0.8

0.53

0.356

Table 11. Example Limiter Attack Rate Settings

5.9 LIMITER RELEASE RATE (ADDRESS 09H) (RRATE)

7

RRATE7

0

6

RRATE6

0

5

RRATE5

1

4

RRATE4

0

3

RRATE3

0

2

RRATE2

0

1

RRATE1

0

0

RRATE0

0

Default = 20h - 16 LRCK’s per 1/8 dB

Function:

The limiter release rate is user-selectable. The rate is a function of sampling frequency, Fs, and the value

in Limiter Release Rate register. Rates are calculated using the function RATE = 512/{value}. Where {val-

ue} is the decimal value in the Limiter Release Rate register and RATE is in LRCK’s per 1/8 dB of change.

NOTE: A value of zero in this register is not recommended, as it will induce erratic behavior of the limiter.

Use the LIM_EN bit to disable the limiter function (see Section 5.10.3).

Binary Code

00000001

00010100

00101000

00111100

01011010

Decimal Value

1

20

40

60

90

LRCK’s per 1/8 dB

512

25

12

8

5

Table 12. Example Limiter Release Rate Settings

DS479PP3

21

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