[AK4753]
REF7-0 bits
F1H
F0H
EFH
:
GAIN(dB)
0
-0.375
-0.75
:
Step (dB)
(default)
A0H
9FH
9EH
:
-30.375
-30.75
-31.125
:
0.375
50H
4FH
4EH
:
-60.375
-60.75
-61.125
:
02H
01H
00H
-89.625
-90.0
MUTE
Table 36. Reference Level at Recovery Operation
RFST1 bit
RFST0 bit
Recovery Speed
4 times
0
0
1
1
0
1
0
1
(default)
8 times
16times
N/A
Table 37. Fast Recovery Speed Setting (N/A: not available)
3. Example of the Limiter Operation Setup
An example of the limiter setting is shown in Table 38.
Register Name Comment
fs=8kHz
Operation
fs=44.1kHz
Operation
Data
01
0
Data
01
0
LMTH1-0
ZELMN
ZTM1-0
Limiter detection Level
−4.1dBFS
Enable
32ms
−4.1dBFS
Enable
23.2ms
Limiter zero crossing detection
Zero crossing timeout period
Recovery waiting period
01
11
WTM2-0
*WTM2-0 bits should be the same or
longer data as ZTM1-0 bits.
Reference level at recovery operation
Limiter ATT step
Recovery GAIN step
Fast Recovery Speed
001
32ms
011
23.2ms
REF7-0
F1H
00
00
0dB
1 step
1 step
4 times
F1H
00
00
0dB
1 step
1 step
4 times
LMAT1-0
RGAIN1-0
RFST1-0
00
00
Table 38. Example of the Limiter Operation Setting
MS1311-E-00
2011/07
- 46 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
