AK4636 Datasheet, PDF (77/105 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP

[AK4636]
Addr
06H
Register Name
Timer Select
R/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
WTM2 ZTM1 ZTM0 WTM1 WTM0 RFST1 RFST0
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
WTM2-0: ALC1 Recovery Waiting Period (Table 30)
A period of recovery operation when any limiter operation does not occur during the ALC1 operation.
Default is “000”.
ZTM1-0: ALC1, ALC2, IVOL and OVOL Zero crossing timeout Period (Table 29)
The gain is changed by the manual volume controlling (ALC off) or the recovery operation (ALC on) only at
Zero crossing or timeout. The default value is “00”.
RFST1-0 : ALC First recovery Speed (Table 34)
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
1
LMTH1-0: ALC Limiter Detection Level / Recovery Waiting Counter Reset Level (Table 27)
LMTH1 bit is located at D6 bit of 0BH. Default: “01”
RGAIN1-0: ALC Recovery GAIN Step (Table 31)
RGAIN1 bit is located at D7 bit of 0BH. 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 of recoding path Enable
0: Disable (default)
1: Enable
ALC2: ALC2 of playback path Enable
0: Disable (default)
1: Enable
LFST: Limiter function of ALC when the output is bigger than Fs.
0: The volume value is changed at zero crossing or timeout. (default)
1: When output of ALC is bigger than FS, VOL value is changed instantly.
MS1012-E-01
- 77 -
2010/08