CS42L56 查看數據表（PDF） - Cirrus Logic
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CS42L56 Datasheet PDF : 92 Pages
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4.4
Analog Outputs
INPUTS FROM ADCA
and ADCB
Fixed Function DSP
AMIXAMUTE
AMIXBMUTE
AMIXAVOL[6:0]
AMIXBVOL[6:0]
PMIXAMUTE
PMIXBMUTE
PMIXAVOL[6:0]
PMIXBVOL[6:0]
VOL
PCMASWAP[1:0]
PCMBSWAP[1:0]
Channel
Swap
Demph
VOL
Channel
Swap
DEEMPH
INV_PCMA
INV_PCMB
OFFTIME[2:0]
ONTIME[3:0]
FREQ[3:0]
BEEP[1:0]
Beep
Generator
BPVOL[4:0]
VOL
MSTAVOL[7:0]
MSTBVOL[7:0]
Chnl Vol.
Settings
ADCASWAP[1:0]
ADCBSWAP[1:0]
VOL
MSTAMUTE
MSTBMUTE
DIGSFT
PLYBCKB=A
CS42L56
LIMARATE[7:0]
LIMRRATE[7:0]
LMAX[2:0]
CUSH[2:0]
LIMSRDIS
LIMIT
LIMIT_ALL
Limiter
Peak
Detect
Bass/
Treble/
Control
TC_EN
BASS_CF[1:0]
TREB_CF[1:0]
BASS[3:0]
TREB[3:0]
DAC
* PDN_DSP
to HP and
Line MUX
Digital Mix to ADC
Serial Interface
*
MSTxVOL[7:0], MSTxMUTE and DIGSFT are always
available regardless of the PDN_DSP setting.
Figure 19. DSP Engine Signal Flow
Referenced Control
DSP
PDN_DSP
DEEMPH
PMIXxMUTE
PMIXxVOL[6:0]
INV_PCMx
PCMxSWAP[1:0]
AMIXxMUTE
AMIXxVOL[6:0]
ADCxSWAP[1:0]
MSTxVOL[7:0]
MSTxMUTE
DIGSFT
PLYBCKB=A
TC_EN
BASS_CF[1:0]
TREB_CF[1:0]
BASS[3:0]
TREB[3:0]
Limiter
LIMIT
LIMIT_ALL
LIMSRDIS
LMAX[2:0]
CUSH[2:0]
LIMARATE[7:0]
LIMRRATE[7:0]
Beep Generator
Register Location
“Power Down DSP” on page 66
“HP/Line De-Emphasis” on page 66
“PCM Mixer Channel x Mute” on page 67
“PCM Mixer Channel x Volume” on page 68
“Invert PCM Signal Polarity” on page 66
“PCM Mix Channel Swap” on page 74
“ADC Mixer Channel x Mute” on page 67
“ADC Mixer Channel x Volume” on page 67
“ADC Mix Channel Swap” on page 74
“Master Volume Control” on page 70
“Master Playback Mute” on page 67
“Digital Soft Ramp” on page 64
“Playback Channels B=A” on page 66
“Tone Control Enable” on page 73
“Bass Corner Frequency” on page 73
“Treble Corner Frequency” on page 72
“Bass Gain” on page 73
“Treble Gain” on page 73
“Peak Detect and Limiter” on page 86
“Peak Signal Limit All Channels” on page 86
“Limiter Soft Ramp Disable” on page 82
“Limiter Maximum Threshold” on page 85
“Limiter Cushion Threshold” on page 85
“Limiter Attack Rate” on page 87
“Limiter Release Rate” on page 86
Refer to “Beep Generator” on page 45 for all referenced controls
DS851F2
37
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