Datasheet

[AK4646]
MS0557-E-06 2011/06
- 58 -
Addr Register Name D7 D6 D5 D4 D3 D2 D1 D0
06H Timer Select 0 WTM2 ZTM1 ZTM0 WTM1 WTM0 RFST1 RFST0
R/W R R/W R/W R/W R/W R/W R/W R/W
Default 0 0 0 0 0 0 0 0
WTM2-0: ALC Recovery Waiting Period (
Table 26)
A period of recovery operation when any limiter operation does not occur during the ALC1 operation
Default is “000” (128/fs).
ZTM1-0: ALC Limiter/Recovery Operation Zero Crossing Timeout Period (
Table 25)
When the IPGA perform zero crossing or timeout, the IPGA value is changed by the
μP WRITE operation,
ALC1 recovery operation. Default is “00” (128/fs).
RFST1-0: ALC Fast Recovery Speed (
Table 30)
Default: “00” (4times)
Addr Register Name D7 D6 D5 D4 D3 D2 D1 D0
07H ALC Mode Control 1 LFST ALC2 ALC1 ZELMN LMAT1 LMAT0
RGAIN0
LMTH0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Default 0 0 0 0 0 0 0 0
LMTH1-0: ALC Limiter Detection Level / Recovery Counter Reset Level (
Table 23)
Default: “00”
LMTH1 bit is D6 bit of 0BH.
RGAIN1-0: ALC Recovery GAIN Step (
Table 27)
Default: “00”
RGAIN1 bit is D7 bit of 0BH.
LMAT1-0: ALC Limiter ATT Step (
Table 24)
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: Limiter function of ALC when the output was bigger than Fs.
0: Output is zero crossing or being changed value of volume at the time of the output is zero crossing time out.
1: When output of ALC is bigger than FS, VOL value is changed instantly.