CS42L50 Datasheet, PDF (28/48 Pages) Cirrus Logic – Low Voltage, Stereo CODEC with headphone Amp

CS42L50
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)
7
6
5
4
3
2
1
0
TC1
TC0
TC_EN
LIM_EN
ATAPI3
ATAPI2
ATAPI1
ATAPI0
0
0
0
0
1
0
0
1
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.
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