AK4564 Datasheet, PDF (42/48 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH BUILT-IN ALC AND MIC/HP/SPK-AMP

ASAHI KASEI
[AK4564]
ALC Mode Control 3
Addr
Register Name
09H ALC Mode Control 3
Default
D7
REF7
1
D6
REF6
1
D5
REF5
1
D4
REF4
0
D3
REF3
0
D2
REF2
0
D1
REF1
0
D0
REF0
1
REF7-0: Reference value at ALC1 Recovery Operation. 0.375dB step, 242 Levels
During the ALC1 recovery operation, if the REF value exceeds the setting reference value by
Gain operation, REF value does not become larger than the reference value.
GSEL bit selects the gain table of either MIC or LINE.
GAIN(dB)
DATA
MIC
LINE
(GSEL bit = “0”) (GSEL bit = “1”)
F1H
+36.0
+6.0
F0H
+35.625
+5.625
EFH
+35.25
+5.25
•
•
E2H
+30.375
•
+0.375
E1H
+30.0
0
Default
E0H
+29.625
-0.375
DFH
+29.25
-0.75
•
•
04H
-52.875
•
-82.875
03H
-53.25
-83.25
02H
-53.625
-83.625
01H
-54.0
-84.0
00H
MUTE
MUTE
Table 22. Set-up Reference Level at ALC1 Recovery operation
MS0140-E-01
- 42 -
2002/07