AK4953A Datasheet, PDF (71/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/HP/SPK-AMP

[AK4953A]
Addr
0BH
Register Name
ALC Mode Control 1
R/W
Default
D7
LFST
R/W
0
D6
ALC2
R/W
0
D5
ALC1
R/W
0
D4
ZELMN
R/W
0
D3
LMAT1
R/W
0
D2
LMAT0
R/W
0
D1
LMTH1
R/W
0
D0
LMTH0
R/W
0
LMTH1-0: ALC Limiter Detection Level / Recovery Counter Reset Level (Table 27)
Default: “00”
LMAT1-0: ALC Limiter ATT Step (Table 28)
Default: “00”
ZELMN: Zero Crossing Detection Enable at ALC Limiter Operation
0: Enable (default)
1: Disable
ALC1: ALC Enable for Recording
0: Recording ALC Disable (default)
1: Recording ALC Enable
ALC2: ALC Enable for Playback
0: Playback ALC Disable (default)
1: Playback ALC Enable
LFST: ALC Limiter operation when the output level exceed FS(Full-scale) level.
0: The volume is changed at zero crossing or zero crossing time out. (default)
1: When output of ALC is larger than FS, OVOL value is changed immediately (1/fs).
Addr
0CH
Register Name
ALC Mode Control 2
R/W
Default
D7
IREF7
R/W
1
D6
IREF6
R/W
1
D5
IREF5
R/W
1
D4
IREF4
R/W
0
D3
IREF3
R/W
0
D2
IREF2
R/W
0
D1
IREF1
R/W
0
D0
IREF0
R/W
1
IREF7-0: Reference Value at ALC Recovery Operation. 0.375dB step, 242 Level (Table 32)
Default: “E1H” (+30.0dB)
Addr
0DH
Register Name
ALC Mode Control 3
R/W
Default
D7
RGAIN1
R/W
0
D6
RGAIN0
R/W
0
D5
OREF5
R/W
1
D4
OREF4
R/W
0
D3
OREF3
R/W
1
D2
OREF2
R/W
0
D1
OREF1
R/W
0
D0
OREF0
R/W
0
OREF5-0: Reference value at Playback ALC Recovery Operation. 0.375dB step, 50 Level (Table 33)
Default: “28H” (+6.0dB)
RGAIN1: ALC Recovery GAIN Step (Table 31)
Default: “00”
MS1252-E-00
- 71 -
2010/10