參數(shù)資料
型號: AK4665A
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 20-Bit Stereo CODEC with MIC/HP-AMP
中文描述: 20位立體聲編解碼器麥克風(fēng)/惠普腺苷
文件頁數(shù): 22/52頁
文件大?。?/td> 541K
代理商: AK4665A
ASAHI KASEI
[AK4665A]
MS0440-E-01
2006/05
- 22 -
Input Digital Volume (IVOL: Manual Mode)
The input digital volume becomes a manual mode when ALC1 bit is “0”. This mode is used in the case shown below.
1. After exiting reset state, set-up the registers for the ALC1 operation (ZTM1-0, LMTH and etc)
2. When the registers for the ALC1 operation (Limiter period, Recovery period and etc) are changed.
For example; when the change of the sampling frequency.
3. When IVOL is used as a manual volume.
IVOL7-0 bits set the gain of the volume control (Table 16). The IVOL value is changed at zero crossing or timeout. Zero
crossing timeout period is set by ZTM1-0 bits.
If IVOL7-0 bits are written during PMADC bit = “0”, IVOL operation starts with the written values at the end of the ADC
initialization cycle after PMADC bit is changed to “1”.
Default
IVOL7-0
GAIN (dB)
Step
FFH
FEH
FDH
:
92H
91H
90H
:
03H
02H
01H
00H
+41.25
+40.875
+40.5
:
+0.375
0.0
0.375
:
53.25
53.625
54
MUTE
0.375dB
Table 16. Input Digital Volume
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