[AK4646]
Addr Register Name
06H Timer Select
R/W
D7
0
R
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
Default
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
07H ALC Mode Control 1
R/W
D7
LFST
R/W
0
D6
ALC2
R/W
0
D5
ALC1
R/W
0
D4
D3
D2
D1
RGAIN0
R/W
0
D0
LMTH0
R/W
0
ZELMN LMAT1 LMAT0
R/W
0
R/W
0
R/W
0
Default
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.
MS0557-E-05
2011/01
- 58 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
