ak4141 AKM Semiconductor, Inc., ak4141 Datasheet - Page 49

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

ALC2
WTM2[2:0]: ALC2 Recovery Waiting Period
ZTM2[1:0]: ALC2 Zero Crossing Timeout Period
RFST2[1:0]: ALC2 Fast Recovery Speed
MS0952-E-00
Addr
29H
WTM22
0
0
0
0
1
1
1
1
WTM2[2-0] bits set a period of recovery operation when any limiter operation does not occur during ALC2
operation. Default= “000” (128/fs).
At ALC2 recovery operation, the gain changes only when zero crossing or timeout. Default= “00” (128/fs).
Default: “00”(x 4 speed)
ZTM21
Default
Register Name
0
0
1
1
R/W
Timer Select
WTM21
0
0
1
1
0
0
1
1
RFST21 bit
ZTM20
0
1
0
1
0
0
1
1
Table 33. ALC2 Fast Recovery Speed (N/A: Not available)
WTM20
0
1
0
1
0
1
0
1
Table 32. ALC2 Zero Crossing Timeout Period
1024/fs
Table 31. ALC2 Recovery Waiting Period
128/fs
256/fs
512/fs
R/W
D7
0
0
RFST20 bit
16384/fs
1024/fs
2048/fs
4096/fs
8192/fs
128/fs
256/fs
512/fs
ALC2 Zero Crossing Timeout Period
0
1
0
1
R/W
D6
0
ALC Recovery Operation Waiting Period
32kHz
16.0ms
32.0ms
4.0ms
8.0ms
WTM2[2:0]
- 49 -
128.0ms
256.0ms
512.0ms
R/W
32kHz
D5
16.0ms
32.0ms
64.0ms
0
4.0ms
8.0ms
Fast Recovery Speed
44.1kHz
R/W
x 16
D4
11.6ms
23.2ms
N/A
x 4
x 8
0
2.9ms
5.8ms
44.1kHz
185.8ms
371.5ms
11.6ms
23.2ms
46.4ms
92.9ms
2.9ms
5.8ms
R/W
D3
0
ZTM2[1:0]
48kHz
10.7ms
21.3ms
(default)
2.7ms
5.3ms
R/W
D2
170.7ms
341.3ms
48kHz
0
10.7ms
21.3ms
42.7ms
85.3ms
2.7ms
5.3ms
(default)
R/W
D1
0
RFST2[1:0]
(default)
[AK4141]
R/W
2008/05
D0
0