CS42L56 查看數據表（PDF） - Cirrus Logic

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CS42L56

Ultralow Power, Stereo Codec with Class H Headphone Amp

Cirrus Logic 

CS42L56

of Line

Path

=

Poaf tHhP =

HP/LINE Supply

Decision :

VCP

Case 2 Result

VCP/2

Case 1 Result

-10.5 dB

case1

case2

case2

-10. 5 dB

case1

Effect of Volume Sum in HP or Line Paths

Since the HP and the Line amplifiers also share the same sup-

ply, the explanation above applies to the total gain/attenuation

set in the HP and Line amplifiers. If enabled, the volume set-

tings in the path of both amplifiers are considered before the

charge pump supplies the appropriate rail voltage.

Class H

Controller

Figure 24. HP/Line Channel Effects

Referenced Control Register Location

AINADV[7:0] ........................ “Analog Input Advisory Volume” on page 69

MICxBOOST ....................... “PGA x Preamplifier Gain” on page 77

PDNMICx ............................ “Power Down MIC Bias” on page 59

PGAxVOL............................ “PGAx Volume” on page 78

ADCxMUX ........................... “ADC x Input Select” on page 75

ADCxMUTE......................... “ADC Mute” on page 76

DIGSUM[1:0] ....................... “Digital Sum” on page 76

PDN_DSP ........................... “Power Down DSP” on page 66

HPxVOL[7:0] ....................... “Headphone Volume Control” on page 84

LINExVOL[7:0] .................... “Line Volume Control” on page 84

MSTxVOL[7:0]..................... “Master Volume Control” on page 70

MSTxMUTE......................... “Master Playback Mute” on page 67

AMIXxVOL[6:0].................... “ADC Mixer Channel x Volume” on page 67

PMIXxVOL[6:0].................... “PCM Mixer Channel x Volume” on page 68

DINADV[7:0]........................ “Digital Input Advisory Volume” on page 69

ADCxSWP........................... “ADC Mix Channel Swap” on page 74

PCMxSWP .......................... “PCM Mix Channel Swap” on page 74

HPxMUX.............................. “Headphone Input Select” on page 83

LINExMUX........................... “Line Input Select” on page 83

HPxMUTE ........................... “Headphone Channel x Mute” on page 83

LINExMUTE ........................ “Line Channel x Mute” on page 84

PDN_HPx ............................ “Headphone Power Control” on page 59

PDN_LINEx ......................... “Line Power Control” on page 60

TREB................................... “Treble Gain” on page 73

BASS................................... “Bass Gain” on page 73

TCEN................................... “Tone Control Enable” on page 73

BEEP................................... “Beep Configuration” on page 72

BPVOL ................................ “Beep Volume” on page 72

ADCB=A .............................. “ADC Channel B=A” on page 76

PGAB=A .............................. “PGA Channel B=A” on page 76

BOOSTx .............................. “Boostx” on page 77

PLYBCKB=A........................ “Playback Channels B=A” on page 66

DS851F2

41

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