AK4649 Datasheet, PDF (70/96 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK-AMP

[AK4649]
Addr
06H
Register Name
Timer Select
R/W
Default
D7
ADRST
R/W
0
D6
WTM2
R/W
0
D5
ZTM1
R/W
0
D4
ZTM0
R/W
0
D3
WTM1
R/W
0
D2
WTM0
R/W
0
D1
RFST1
R/W
0
D0
RFST0
R/W
0
ADRST: ADC Initialization Cycle Setting
0: 1059/fs (default)
1: 267/fs
WTM2-0: ALC Recovery Waiting Period (Table 28)
A period of recovery operation when any limiter operation does not occur during ALC operation
Default is “000” (128/fs).
ZTM1-0: ALC Limiter/Recovery Operation Zero Crossing Timeout Period (Table 27)
In case of the μP WRITE operation or ALC1 recovery operation, the volume is changed at zero crossing or
timeout.
RFST1-0: ALC First recovery Speed (Table 32)
Default: “00”(4times)
Addr
07H
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
RGAIN0
R/W
0
D0
LMTH0
R/W
0
LMTH1-0: ALC Limiter Detection Level / Recovery Counter Reset Level (Table 25)
Default: “00”
LMTH1 bit is D6 bit of 0BH.
RGAIN1-0: ALC Recovery GAIN Step (Table 29)
Default: “00”
RGAIN1 bit is D7 bit of 0BH.
LMAT1-0: ALC Limiter ATT Step (Table 26)
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).
MS1023-E-01
- 70 -
2010/08