CS42L55 데이터 시트보기 (PDF) - Cirrus Logic

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CS42L55

Ultra Low Power, Stereo CODEC w/Class H Headphone Amp

Cirrus Logic 

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

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