ak4564 AKM Semiconductor, Inc., ak4564 Datasheet - Page 41

• Manufacturer Part Number: ak4564
• Description: 16bit Codec With Built-in Alc And Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ALC Mode Control 2
MS0140-E-01
Addr
08H
LMTH1-0: ALC1 Limiter Detection Level / Recovery Counter Reset Level
FR: Enable ALC1 Fast Recovery Operation
FSTM: This data determines the time of ALC1 recovery period (WTM1-0 bit), IVOL zero crossing timeout period
ALC Mode Control 2
(ZTM1-0 bit), OATT zero crossing timeout period (TM1-0 bit) and FADEIN/OUT period (FDTM1-0 bit)
LMTH1
Default
Register Name
0
0
1
1
ZTM1-0 and WTM1-0 bits.
0: Disable
1: Enable (Default)
If the impulse noise is supplied, the ALC1 recovery operation becomes the faster period than a set of
0: fs = 48kHz (Default)
1: fs = 32kHz
Table 21. ALC1 Limiter Detection Level / Recovery Counter Reset Level
LMTH0 ALC1 Limier Detection Level ALC1 Recovery Waiting Counter Reset Level
0
1
0
1
ALC1 Output -2.5dBFS
ALC1 Output -4.1dBFS
ALC1 Output -6.0dBFS
ALC1 Output -8.5dBFS
D7
0
0
FSTM
D6
0
- 41 -
D5
0
0
-2.5dBFS > ALC1 Output
-4.1dBFS > ALC1 Output -6.0dBFS
-6.0dBFS > ALC1 Output -8.5dBFS
-8.5dBFS > ALC1 Output -12dBFS
D4
0
0
D3
0
0
D2
FR
1
-4.1dBFS
LMTH1 LMTH0
D1
1
2002/07
D0
Default
0