AK4563A Datasheet, PDF (24/39 Pages) Asahi Kasei Microsystems – Low Power 16bit 4ch ADC & 2ch DAC with ALC

ASAHI KASEI
[AK4563A]
Addr
05H
Register Name
ALC Mode Control 2
R/W
RESET
D7
D6
D5
D4
D3
D2
D1
D0
0
REF6 REF5 REF4 REF3 REF2 REF1 REF0
R/W
0
28H
REF6-0: Set the Reference value at ALC Recovery Operation
During the ALC recovery operation, when IPGA value becomes the reference value set by REF6-0, the
gain of the ALC recovery operation exceeds the reference value. The reference value is set commonly as
for Lch and Rch of IPGA0 and IPGA1.
During the ALC recovery operation, if IPGA value exceeds the setting reference value by GAIN operation,
IPGA does not become the larger than the reference value.
For example, when REF6-0 = 30H, RATT = 2 step and IPGA = 2FH, IPGA will become 2FH + 2 step =
31H by the ALC recovery operation, but IPGA value becomes 30H as REF value is 30H.
IPGA should be certainly set to the same value or smaller than REF value before entering ALC mode
(including the FADEIN/OUT operation).
DATA
GAIN(dB)
MIC
LINE
Step Level
60H
+28.0
+6.0
5FH
+27.5
+5.5
5EH
+27.0
+5.0
•
•
•
28H
+0.0
-22.0
0.5dB
73
27H
-0.5
-22.5
•
•
•
19H
-7.5
-29.5
18H
-8.0
-30.0
17H
-9.0
-31.0
16H
-10.0
-32.0
•
•
•
1dB
8
11H
-15.0
-37.0
10H
-16.0
-38.0
0FH
-18.0
-40.0
0EH
-20.0
•
•
-42.0
•
2dB
12
05H
-38.0
-60.0
04H
-40.0
-62.0
03H
-44.0
-66.0
02H
-48.0
-70.0
4dB
3
01H
-52.0
-74.0
00H
MUTE
MUTE
1
Table 14. Setting Reference Value at ALC Recovery Operation
MS0067-E-02
- 24 -
2004/12