AK4538 Datasheet, PDF (54/70 Pages) Asahi Kasei Microsystems – 16Bit DS CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4538]
Addr
0AH
Register Name
ALC Mode Control 2
R/W
Default
D7
D6
D5
D4
D3
D2
D1
D0
0
REF6 REF5 REF4 REF3 REF2 REF1 REF0
RD
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
1
1
0
1
1
0
REF6-0: Reference value at ALC1 Recovery Operation (see Table 33)
During the ALC1 recovery operation, if the IPGA value exceeds the setting reference value by gain operation, then
the IPGA does not become larger than the reference value. For example, when REF7-0 = “30H”, RATT = 2step,
IPGA = 2FH, even if the input signal does not exceed the “ALC1 Recovery Waiting Counter Reset Level”, the
IPGA does not change to 2FH + 2step = 31H, and keeps 30H. Default is “36H”.
DATA (HEX) GAIN (dB)
STEP
47
+27.5
46
+27.0
45
+26.5
:
:
36
+19.0
Default
:
:
10
+0.0
:
:
0.5dB
06
−5.0
05
−5.5
04
−6.0
03
−6.5
02
−7.0
01
−7.5
00
−8.0
Table 33. Setting Reference Value at ALC1 Recovery Operation
MS0198-E-01
- 54 -
2003/5