CS42L55 Datasheet, PDF (47/73 Pages) Cirrus Logic – Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

6.8.2
CS42L55
Line Input Select
Selects the specified analog input signal into line amplifier x.
LINExMUX
0
1
Selected Input to Line Amplifier Ch. x
DACx
PGAx - Use PGAxMUX bit (“PGA x Input Select” on page 49) to select an input channel.
Note: The PGA path must not be selected while the Line Amplifier is powered down.
6.8.3
Headphone Input Select
Selects the specified analog input signal into headphone amplifier x.
HPxMUX
0
1
Selected Input to HP Amplifier Ch. x
DACx
PGAx - Use PGAxMUX bit (“PGA x Input Select” on page 49) to select an input channel.
Note: The PGA path must not be selected while the Headphone Amplifier is powered down.
6.9 HPF Control (Address 09h)
7
HPFB
6
HPFRZB
5
HPFA
4
HPFRZA
3
HPFB_CF1
6.9.1
ADCx High-Pass Filter
Configures the internal high-pass filter after ADCx.
HPFx
0
1
High Pass Filter Status
Disabled
Enabled
2
HPFB_CF0
1
HPFA_CF1
0
HPFA_CF0
6.9.2
ADCx High-Pass Filter Freeze
Configures the high pass filter’s digital DC subtraction and/or calibration after ADCx.
HPFRZx
0
1
High Pass Filter Digital Subtraction
Continuous DC Subtraction
Frozen DC Subtraction
6.9.3
HPF x Corner Frequency
Sets the corner frequency (-3 dB point) for the internal High-Pass Filter (HPF).
HPFx_CF[1:0]
00
01
10
11
HPF Corner Frequency Setting (Fs=48 kHz)
1.8 Hz
119 Hz
236 Hz
464 Hz
DS773F1
47