CS43L43 データシートの表示（PDF） - Cirrus Logic

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CS43L43

Low Voltage, Stereo DAC with Headphone Amp

Cirrus Logic 

CS43L43

5.10 VOLUME AND MIXING CONTROL (ADDRESS 0AH)

7

6

5

4

3

2

TC1

TC0

TC_EN

LIM_EN

ATAPI3

ATAPI2

0

0

0

0

1

0

1

ATAPI1

0

0

ATAPI0

1

5.10.1 TONE CONTROL MODE (TC) BIT 6-7

Default = 00

00 - All settings are taken from user registers

01 - 12 dB of Bass Boost at 100 Hz and 6 dB of Treble Boost at 7 kHz

10 - 8 dB of Bass Boost at 100 Hz and 4 dB of Treble Boost at 7 kHz

11 - 4 dB of Bass Boost at 100 Hz and 2 dB of Treble Boost at 7 kHz

Function:

The Tone Control Mode bits determine how the Bass Boost and Treble Boost features are configured.

The user-defined settings from the Bass and Treble Boost Level and Corner Frequency registers are used

when these bits are set to ‘00’. Alternatively, one of three pre-defined settings may be used.

5.10.2 TONE CONTROL ENABLE (TC_EN) BIT 5

Default = 0

0 - Disabled

1 - Enabled

Function:

The Bass Boost and Treble Boost features are active when this function is enabled.

5.10.3 PEAK SIGNAL LIMITER ENABLE (LIM_EN) BIT 4

Default = 0

0 - Disabled

1 - Enabled

Function:

The CS43L43 will limit the maximum signal amplitude to prevent clipping when this function is enabled.

Peak Signal Limiting is performed by first decreasing the Bass and Treble Boost Levels. If the signal is

still clipping, then the digital attenuation is increased. The attack rate is determined by the Limiter Attack

Rate register.

Once the signal has dropped below the clipping level, the attenuation is decreased back to the user se-

lected level and then, the Bass Boost is increased back to the user selected level. The release rate is

determined by the Limiter Release Rate register.

NOTE: The A=B bit should be set to ‘1’ for optimal limiter performance.

22

DS479PP3

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