參數(shù)資料
型號： AK4665AEN
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, QCC32
封裝： 5 X 5 MM, 0.50 MM PITCH, LEAD FREE, QFN-32
文件頁數(shù)： 15/52頁
文件大?。?/td> 522K
代理商： AK4665AEN
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”.
IVOL7-0
GAIN (dB)
Step
FFH
+41.25
FEH
+40.875
FDH
+40.5
:
92H
+0.375
91H
0.0
Default
90H
0.375
:
03H
53.25
02H
53.625
01H
54
0.375dB
00H
MUTE
Table 16. Input Digital Volume
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