參數(shù)資料
型號: AK4633
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16-Bit Mono CODEC with ALC & MIC/SPK-AMP
中文描述: 16位單聲道編解碼器ALC的
文件頁數(shù): 49/82頁
文件大?。?/td> 688K
代理商: AK4633
ASAHI KASEI
[AK4633]
MS0447-E-03
2006/04
- 49 -
The following registers should not be changed during the ALC operation. These bits should be changed after the ALC
operation is finished by ALC1 = ALC2 bits =
0
or PMPFIL bit =
0
.
LMTH, LMAT1-0, WTM1-0, ZTM1-0, RGAIN1-0, IREF7-0/OREF7-0, ZELM, RFST1-0
Manual Mode
WR (ZTM1-0, WTM1-0)
WR (IREF7-0/OREF5-0)
WR (IVOL7-0/OVOL7-0)
WR (LMAT1-0, RGAIN0, ZELMN, LMTH0)
WR (ALC1= “1”)
Example:
Limiter = Zero crossing Enable
Recovery Cycle = 16ms@8kHz
Limiter and Recovery Step = 1
Maximum Gain = +19.5dB
Limiter Detection Level =
4.1dBFS
ALC1 bit = “1”
(1) Addr=06H, Data=00H
(2) Addr=08H, Data=C5H
(5) Addr=07H, Data=21H
(3) Addr=09H, Data=C5H
ALC Operation
WR (RGAIN1, LMTH1,RFST1-0)
(4) Addr=0BH, Data=28H
*2
*1
Note : WR : Write
*1: The value of volume at starting should be the same or smaller than REF’s.
*2: When setting ALC1 bit or ALC2 bit to
0
, the operation is shifted to manual mode after passing the zero crossing
time set by ZTM1-0 bits.
Figure 36. Registers set-up sequence at ALC operation
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