AK4561 Datasheet, PDF (24/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp

ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
ALC Mode Control 2
Addr
Register Name
D7
D6
D5
D4
D3
D2
D1
D0
06H ALC Mode Control 2
0
REF6 REF5 REF4 REF3 REF2 REF1 REF0
RESET
0
1
1
0
0
0
0
0
REF6-0: Set the Reference value at ALC Recovery Operation
During the ALC recovery operation, if the IPGA value exceeds the setting reference value by
Gain operation, IPGA does not become the larger than the reference value.
For example, when REF=30H, RATT=2, IPGA=2FH and IPGA will become 2FH + 2step = 31H
by the ALC recovery operation, but the IPGA value becomes 30H as REF value is 30H.
RESET
DATA
GAIN(dB)
MIC
LINE
STEP
LEVEL
60H
+26.0
+0.0
5FH
+25.5
-0.5
5EH
+25.0
-1.0
•
•
•
2CH
+0.0
-26.0
0.5dB
73
2BH
-0.5
-26.5
•
•
•
19H
-9.5
-35.5
18H
-10.0
-36.0
17H
-11.0
-37.0
16H
-12.0
-38.0
•
•
•
1dB
8
11H
-17.0
-43.0
10H
-18.0
-44.0
0FH
-20.0
-46.0
0EH
-22.0
-48.0
•
•
•
2dB
12
05H
-40.0
-66.0
04H
-42.0
-68.0
03H
-46.0
-72.0
02H
-50.0
-76.0
4dB
3
01H
-54.0
-80.0
00H
MUTE MUTE
1
Table 14. Setting Reference Value at ALC Recovery Operation
Rev. 0.9
- 24 -
2000/09