AK4632VN AKM [Asahi Kasei Microsystems], AK4632VN Datasheet - Page 52

• Manufacturer Part Number: AK4632VN
• Description: 16-Bit ?? Mono CODEC with ALC & MIC/SPK/Video-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
MS0396-E-00
Addr
08H
ALC1: ALC1 Enable
ALC2: ALC2 Enable
REF6-0: Reference value at ALC1 Recovery Operation (See Table 41)
0: ALC1 Disable (Default)
1: ALC1 Enable
0: ALC2 Disable
1: ALC2 Enable (Default)
Register Name
ALC Mode Control 2
After completing the initializing cycle (512/fs = 64ms @fs=8kHz at ROTM bit = “0”), the ALC2 operation is
enabled. When the PMSPK bit changes from “0” to “1” or PDN pin changes from “L” to “H”, the initilization
cycle starts.
When ALC1 bit is “1”, the ALC1 operation is enabled.
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”.
Default
Table 41. Setting Reference Value at ALC1 Recovery Operation
DATA (HEX)
D7
0
0
47
46
45
36
10
06
05
04
03
02
01
00
:
:
:
REF6
D6
0
GAIN (dB)
- 52 -
+27.5
+27.0
+26.5
+19.0
+0.0
−5.0
−5.5
−6.0
−6.5
−7.0
−7.5
−8.0
REF5
D5
:
:
:
1
REF4
D4
1
0.5dB
STEP
REF3
D3
0
Default
REF2
D2
1
REF1
D1
1
[AK4632]
2005/06
REF0
D0
0