Cirrus Logic CS43L22 - Manual (Page 44)

44 DS792F2
CS43L22
Confidential Draft
3/4/10
7.11 Miscellaneous Controls (Address 0Eh)
7.11.1 Passthrough Analog
Configures an analog passthrough from the analog inputs to the headphone/line outputs.
7.11.2 Passthrough Mute
Configures an analog mute on the channel x analog in to analog out passthrough.
7.11.3 Freeze Registers
Configures a hold on all register settings.
7.11.4 HP/Speaker De-Emphasis
Configures a 15 μs/50μs digital de-emphasis filter response on the headphone/line and speaker outputs .
7.11.5 Digital Soft Ramp
Configures an incremental volume ramp from the current level to the new level at the specified rate.
7 6 5 4 3 2 1 0
PASSTHRUB PASSTHRUA PASSBMUTE PASSAMUTE FREEZE DEEMPH DIGSFT DIGZC
PASSTHRUx Analog In Routed to HP/Line Output
0 Disabled
1 Enabled
PASSxMUTE Passthrough Mute
0 Disabled
1 Enabled
FREEZE Control Port Status
0 Register changes take effect immediately
1
Modifications may be made to all control port registers without the changes taking effect until after the
FREEZE is disabled.
DEEMPHASIS Control Port Status
0 Disabled
1 Enabled
DIGSFT Volume Changes Affected Digital Volume Controls
0 Does not occur with a soft ramp MSTxMUTE ( “Master Playback Mute” on page 43 ),
HPxMUTE, SPKxMUTE ( “Playback Control 2 (Address 0Fh)” on page 45 ),
PCMxMUTE, PCMxVOL[7:0] ( “PCM Channel x Volume” on page 47 ),
MSTxVOL[7:0] ( “Master Volume Control” on page 51 ),
HPxVOL[7:0] ( “Headphone Volume Control” on page 51 ),
SPKxVOL[7:0] ( “Speaker Volume Control” on page 52 ),
1 Occurs with a soft ramp
Ramp Rate: 1/8 dB every LRCK cycle