Cirrus Logic CS42L73 - Manual (Page 96)

96 DS882F1
CS42L73
page 96 ). If soft-ramping is disabled, a single volume change will occur according to the
volume control change. If soft ramping is enabled, the volume change is the soft-ramp step
size. With zero cross and soft-ramping enabled, with each zero cross, the volume will step
until it eventually matches the volume control.
6.17.6 Digital Soft-Ramp
Configures an incremental volume ramp from the present level to the new level, at the specified rate. If
Digital Soft-Ramping is enabled (DIGSFT = 1b), the effect of changes to the affected digital volume con-
trols (listed below) is applied progressively over time (see exceptions noted below); if disabled, changes
are applied abruptly, all at once.
Notes:
• This register bit also sets the noise gate mute/unmute volume ramp rate.
• This register bit does not affect the digital mixer’s soft ramping. Register
“Mixer Soft-Ramp
Enable” on page 117 configures the digital mixer’s soft ramping.
• This register bit also affects the ALC and Limiter digital volume attack and release rates
(soft-ramped at programmed rates or abrupt). The ALC and Limiter Attack soft-ramping
can be disabled, regardless of this register control bit, via the override controls
“ALCx
Soft-Ramp Disable” on page 116 and “Limiter Soft-Ramp Disable” on page 100 .
6.17.7 Analog Output Soft Ramp
Configures an incremental volume ramp from the present level to the new level, at the specified rate. If
Analog Output Soft-Ramping is enabled (ANLGOSFT = 1b), the effect of changes to the affected analog
volume controls (listed below) is applied progressively over time; if disabled, changes will be applied
abruptly, all at once.
Notes:
• Refer to section “Analog Zero Cross” on page 95 for a description of the ANLGZC control.
DIGSFT Volume Changes Affected Digital Volume Controls
0 Abruptly take effect with-
out a soft-ramp IPxMUTE ( “Input Path x Digital Mute” on page 97 )
IPxDVOL[7:0] ( “Input Path x Digital Volume Control” on page 99 )
HLxDMUTE ( “Headphone/Line Output (HL) x Digital Mute” on page 101 )
HLxDVOL[7:0] ( “Headphone/Line Output (HL) x Digital Volume Control” on page 101 )
ESLDMUTE ( “Ear Speaker/Speakerphone Line Output Digital Mute” on page 100 )
ESLDVOL[7:0] ( “Ear Speaker/Speakerphone Line Output (ESL) [B] Digital Volume Con-
trol” on page 102 )
SPKDMUTE ( “Ear Speaker/Speakerphone Line Output Digital Mute” on page 100 )
SPKDVOL[7:0] ( “Speakerphone Out [A] Digital Volume Control” on page 102 )
1 Occur with a soft-ramp
Soft-Ramp
Rate: 1/8 dB every Fs cycle
ANLGOSFT Volume Changes Affected Analog Output Volume Controls
0 Abruptly take effect with-
out a soft-ramp HPxAMUTE ( “Headphone x Analog Mute” on page 103 )
HPxAVOL[6:0] ( “Headphone x Analog Volume Control” on page 103 )
LOxAMUTE ( “Line Output x Analog Mute” on page 104 )
LOxAVOL[6:0] ( “Line Output x Analog Volume Control” on page 104 )
1 Occur with a soft ramp
Ramp Rate:
ANLGZC = 0b:
1.0 dB (-50 dB to +12 dB) or 2 dB (-76 dB to -50 dB) every 32 Fs cycles
ANLGZC = 1b:
1.0 dB per ANLGZC event