AK4635 Datasheet, PDF (49/81 Pages) Asahi Kasei Microsystems – 16-Bit Mono CODEC with ALC & MIC/SPK/Video-AMP

[AK4635]
5. Example of ALC for Playback Operation
Table 35 shows the example of the ALC setting for playback.
Register Name
LMTH1-0
ZELM
ZTM1-0
WTM2-0
OREF5-0
OVOL7-0
LFST
LMAT1-0
RGAIN1-0
ALC2
FRSL1-0
Comment
fs=8kHz
Data
Operation
Limiter detection Level
01
−4.1dBFS
Limiter zero crossing detection
0
Enable
Zero crossing timeout period
00
16ms
Recovery waiting period
*WTM1-0 bits should be more than or 000
16ms
equal to ZTM1-0 bits
Maximum gain at recovery operation
28
+6dB
Gain of IVOL
91
0dB
Fast Limiter Operation
1
ON
Limiter ATT step
00
1step
Recovery GAIN step
00
1 step
ALC enable
1
Enable
Speed of Fast Recovery
00
4 times
Table 35. Examples of the ALC Setting (Play back)
fs=16kHz
Data
Operation
01
−4.1dBFS
0
Enable
01
16ms
001
16ms
28
+6dB
91
0dB
1
ON
00
1step
00
1 step
1
Enable
00
4 times
Rev. 0.6
- 49 -
2007/10