ak4538 AKM Semiconductor, Inc., ak4538 Datasheet - Page 54

• Manufacturer Part Number: ak4538
• Description: 16bit ?? Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
MS0198-E-01
Addr
0AH
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”.
Register Name
ALC Mode Control 2
Default
R/W
Table 33. Setting Reference Value at ALC1 Recovery Operation
DATA (HEX)
47
46
45
36
10
06
05
04
03
02
01
00
:
:
:
RD
D7
0
0
REF6
R/W
GAIN (dB)
D6
0
+27.5
+27.0
+26.5
+19.0
+0.0
5.0
5.5
6.0
6.5
7.0
7.5
8.0
:
:
:
- 54 -
REF5
R/W
D5
1
0.5dB
STEP
REF4
R/W
D4
1
REF3
R/W
D3
Default
0
REF2
R/W
D2
1
REF1
R/W
D1
1
[AK4538]
REF0
R/W
2003/5
D0
0