CS42L50 datasheet(28/48 Pages) CIRRUS

28 / 48 page

CS42L50

DS544PP1

4.2.19 DE-EMPHASIS CONTROL (DEM)

Default = 00

00 - Disabled

01 - 44.1 kHz

10 - 48 kHz

11 - 32 kHz

Function:

Selects the appropriate digital filter to maintain the standard 15

µs/50 µs digital de-emphasis filter re-

sponse at 32, 44.1 or 48 kHz sample rates. (see Figure 31)

Note:

De-emphasis is not available in Double Speed Mode.

4.2.20 DIGITAL VOLUME CONTROL BYPASS (VCBYP)

Default = 0

0 - Disabled

1 - Enabled

Function:

The digital volume control section is bypassed when this function is enabled. This disables the digital vol-

ume control, muting, bass boost, treble boost, limiting and ATAPI functions. The analog headphone at-

tenuation control will remain functional.

4.2.21 Volume and Mixing Control (address 0Ah)

4.2.22 TONE CONTROL MODE (TC)

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’. Alternately, one of three pre-defined settings may be used.

4.2.23 TONE CONTROL ENABLE (TC_EN)

Default = 0

0 - Disabled

1 - Enabled

Function:

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

765

4321

TC1

TC0

TC_EN

LIM_EN

ATAPI3

ATAPI2

ATAPI1

ATAPI0

000

0100

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