AK4950 Datasheet, PDF (83/106 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP & mini DSP

[AK4950]
Addr
24H
25H
Register Name
ALC Mode Control 1
ALC Mode Control 2
R/W
Default
D23
IREF7
OREF7
R/W
1
D22
IREF6
OREF6
R/W
1
D21
IREF5
OREF5
R/W
1
D20
IREF4
OREF4
R/W
0
D19
IREF3
OREF3
R/W
0
D18
IREF2
OREF2
R/W
0
D17
IREF1
OREF1
R/W
0
D16
IREF0
OREF0
R/W
1
IREF7-0: Reference Value of ALC Recovery Operation (Recording). 0.375dB step, 242 Level (Table 31)
OREF7-0: Reference Value of ALC Recovery Operation (Playback). 0.375dB step, 242 Level (Table 32)
Default: “E1H” (+30.0dB)
Addr Register Name
D23
26H ALC Mode Control 3
0
R/W
R
Default
0
D22
D21
D20
D19
0
WTM1 WTM0
0
R
R/W
R/W
R
0
0
0
0
D18
D17
D16
0
RFST1 RFST0
R
R/W
R/W
0
0
0
RFST1-0: ALC First Recovery Speed (Table 33)
Default: “00”
* Writing to these registers is valid only when PMFIL bit =“0”. When PMFIL bit = “1”, writings are ignored.
WTM1-0: ALC Recovery Waiting Period (Table 29)
Default: “00”
Addr Register Name
D23
D22
D21
D20
D19
D18
27H ALC Mode Control 3 SMUTE ALC RGAIN2 RGAIN1 RGAIN0
0
R/W
R/W
R/W
R/W
R/W
R/W
R
Default
0
0
0
0
0
0
D17
LMTH1
R/W
0
D16
LMTH0
R/W
0
LMTH1-0: ALC Limiter Detection Level / Recovery Counter Reset Level (Table 27)
Default: “00”
RGAIN2-0: ALC Recovery GAIN Step (Table 30)
Default: “000”
* Writing to these registers is valid only when PMFIL bit =“0”. When PMFIL bit = “1”, writings are ignored.
ALC: ALC Enable
0: ALC Disable (default)
1: ALC Enable
SMUTE: Soft Mute Control
0: Normal Operation (default)
1: DAC outputs soft-muted
* This bit is invalid during an ALC operation.
MS1320-E-00
- 83 -
2011/10