ak4141 AKM Semiconductor, Inc., ak4141 Datasheet - Page 47

• Manufacturer Part Number: ak4141
• Description: Nicam/a2/eia-j Digital Stereo Decoder
• Manufacturer: AKM Semiconductor, Inc.

LMTH1[1:0]: ALC1 Limiter Detection Level / Recovery Waiting Counter Reset Level
LMAT1[1:0]: ALC1 Limiter ATT Step
RGAIN1[1:0]: ALC1 Recovery GAIN Step
ZELMN1: Enable zero crossing detection at ALC1 Limiter operation
ALC1: ALC1 Enable
MS0952-E-00
Addr
27H
LMTH11 LMTH10
Default: “00”
Default: “00”
Default: “00”
0: Enable (default)
1: Disable
0: ALC Disable (default)
1: ALC Enable
0
0
1
1
ALC Mode Control 1
LMAT11
Default
Register Name
R/W
0
0
1
1
Table 27. ALC1 Limiter Detection Level / Recovery Waiting Counter Reset Level
0
1
0
1
LMAT10
RGAIN11
ALC Output ≥ −2.5dBFS
ALC Output ≥ −4.1dBFS
ALC Output ≥ −6.0dBFS
ALC Output ≥ −8.5dBFS
Limiter Detection Level
0
1
0
1
0
0
1
1
ALC1
R/W
ALC1 Output
D7
Table 29. ALC1 Recovery GAIN Step
0
RGAIN10
≥ LMTH
Table 28. ALC1 Limiter ATT Step
0
1
0
1
1
2
2
1
ZELMN
R/W
D6
1
0
ALC1 Output
- 47 -
1 step
2 step
3 step
4 step
ALC1 Limiter ATT Step
R/W
≥ FS
D5
RGAIN1[1:0]
0
GAIN STEP
1
2
4
2
Recovery Waiting Counter Reset Level
−2.5dBFS > ALC Output ≥ −4.1dBFS
−4.1dBFS > ALC Output ≥ −6.0dBFS
−6.0dBFS > ALC Output ≥ −8.5dBFS
−8.5dBFS > ALC Output ≥ −12dBFS
R/W
D4
0
0.375dB
0.750dB
1.125dB
1.500dB
ALC1 Output
≥ FS + 6dB
1
2
4
4
R/W
D3
LMAT1[1:0]
0
(default)
ALC1 Output
≥ FS + 12dB
R/W
D2
0
1
2
8
8
R/W
D1
0
LMTH1[1:0]
(default)
(default)
[AK4141]
R/W
2008/05
D0
0