CS43L22 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS43L22' PDF : 66 Pages View PDF
Confidential Draft
3/4/10
CS43L22
7.7 Passthrough x Select: PassA (Address 08h), PassB (Address 09h)
7
Reserved
6
Reserved
5
Reserved
4
Reserved
3
2
1
0
PASSASEL4 PASSASEL3 PASSASEL2 PASSASEL1
7.7.1
Passthrough Input Channel Mapping
Selects one or sums/mixes the analog input signal into the passthrough Amplifier. Each bit of the
PASSx_SEL[4:1] word corresponds to individual channels (i.e. PASSx_SEL1 selects AIN1x,
PASSx_SEL2 selects AIN2x, etc.).
PASSxSEL[4:1] Selected Input to Passthrough Channel x
00000
No inputs selected
00001
AIN1x
00010
AIN2x
00100
AIN3x
01000
AIN4x
Application:
“Analog Passthrough” on page 24
Note: Table does not show all possible combinations.
7.8 Analog ZC and SR Settings (Address 0Ah)
7
Reserved
6
Reserved
5
Reserved
4
Reserved
3
ANLGSFTB
2
ANLGZCB
1
ANLGSFTA
0
ANLGZCA
7.8.1
Ch. x Analog Soft Ramp
Configures an incremental volume ramp from the current level to the new level at the specified rate.
ANLGSFTx
0
1
Ramp Rate:
Volume Changes
Do not occur with a soft ramp
Occur with a soft ramp
1/2 dB every 16 LRCK cycles
Affected Analog Volume Controls
PASSxVOL[7:0] (“Passthrough x Volume” on page 46)
7.8.2
Ch. x Analog Zero Cross
Configures when the signal level changes occur for the analog volume controls.
ANLGZCx
0
1
Volume Changes
Do not occur on a zero cross-
ing
Occur on a zero crossing
Affected Analog Volume Controls
PASSxVOL[7:0] (“Passthrough x Volume” on page 46)
Note: If the signal does not encounter a zero crossing, the requested volume change will occur after a
timeout period of 1024 sample periods (approximately 10.7 ms at 48 kHz sample rate).
7.9 Passthrough Gang Control (Address 0Ch)
7
PASSB=A
6
Reserved
5
Reserved
4
Reserved
3
Reserved
2
Reserved
1
Reserved
0
Reserved
7.9.1
Passthrough Channel B=A Gang Control
Configures independent or ganged control of the passthrough channel settings. Mute is not affected.
PASSB=A
0
1
Single Volume Control
Disabled
Enabled
42
DS792F2
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