[AK4634]
Addr Register Name
09H Input Digital Volume Control IVOL7
D7
D6
IVOL6
R/W
0
D5
IVOL5
R/W
0
D4
IVOL4
R/W
1
D3
IVOL3
R/W
0
D2
IVOL2
R/W
0
D1
IVOL1
R/W
0
D0
IVOL0
R/W
1
R/W
Default
R/W
1
IVOL7-0: Input Digital Volume; 0.375dB step, 242 Level (Table 22)
Default: “91H” (0.0dB)
Addr Register Name
0AH Digital Volume Control
D7
D6
D5
D4
OVOL4
R/W
1
D3
D2
D1
D0
OVOL0
R/W
1
OVOL7 OVOL6 OVOL5
R/W
1
OVOL3 OVOL2 OVOL1
R/W
0
R/W
Default
R/W
0
R/W
0
R/W
0
R/W
0
OVOL7-0: Output Digital Volume; 0.375dB step, 242 Level (Table 23)
Default: “91H” (0.0dB)
Addr Register Name
0BH ALC Mode Control 3
R/W
D7
RGAIN1
R/W
D6
LMTH1
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
Default
0
OREF5-0: Reference value at ALC Recovery operation for playback. 1.5dB step, 60 Level (Table 31)
Default: “28H” (+6.0dB)
LMTH1-0: ALC Limiter Detection Level / Recovery Waiting Counter Reset Level (Table 25)
Default: “01” (-4.1dBFS > ALC Output ≥ -6.0dBFS)
RGAIN1-0: ALC Recovery GAIN Step (Table 29)
RGAIN1 bit is located at D1 bit of 07H. Default: “00”
Addr Register Name
D7
D6
D5
D4
D3
D2
D1
D0
0DH Input Digital Volume Control VOL7
VOL6
VOL5
VOL4
VOL3
VOL2
VOL1
VOL0
R/W
Default
R
-
R
-
R
-
R
-
R
-
R
-
R
-
R
-
VOL7-0: The current volume of ALC; 0.375dB step, 242 Level, Read only (Table 33)
Rev. 0.5
2007/10
- 67 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
