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參數(shù)資料
| 型號： | AK4561 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 元件分類： | Codec |
| 英文描述： | 16bit CODEC with built-in ALC and MIC/HP-Amp |
| 中文描述： | 16位編解碼器在ALC和內(nèi)置麥克風(fēng)/惠普放大器 |
| 文件頁數(shù)： | 45/48頁 |
| 文件大小： | 332K |
| 代理商： | AK4561 |
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ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
Rev. 0.9
2000/09
- 45 -
n
FADEIN Mode
In FADEIN Mode, the IPGA value is increased at the value set by FDATT when FDIN bit changes from “0” to “1”.
The update period can be set by FDTM1-0 bits. The FADEIN Mode is always detected by the zero crossing operation.
This operation is kept over the REF value or until the limiter operation at once. If the limiter operation is done during
FADAIN cycle, the FADEIN operation becomes the ALC operation.
NOTE: When FDIN and FDOUT bits are “1”, FDOUT operation is enabled.
IPGA Ouput
ALC bit
FDIN bit
(1) (2)
(3)
(4)
(5)
Figure 33. Example for controlling sequence in FADEIN operation
(1)
WR (ALC = FDIN = “0”): The ALC operation is disabled. To start the FADEIN operation, FDIN bit is written in “0”.
(2)
WR (IPGA = “MUTE”): The IPGA output is muted.
(3)
WR (ALC = FDIN = “1”): The FADEIN operation starts. The IPGA changes from the MUTE state to the FADEIN
operation.
(4)
The FADEIN operation is done until the limiter detection level (LMTH) or the reference level (REF6-0). After
completing the FADEIN operation, the AK4561 becomes the ALC operation.
(5)
FADEIN time can be set by FDTM1-0 and FDATT bits
E.g. FDTM1-0 = 32ms, FDATT = 1step
(96 x FDTM1-0) / FDATT = 96 x 32ms / 1 = 3.07s
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK4561VQ | 16bit CODEC with built-in ALC and MIC/HP-Amp |
| AK4562 | LOW POWER 20BIT CODEC WITH PGA |
| AK4562VN | LOW POWER 20BIT CODEC WITH PGA |
| AK4563A | Low Power 16bit 4ch ADC & 2ch DAC with ALC |
| AK4563AVF | Low Power 16bit 4ch ADC & 2ch DAC with ALC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK4561VQ | 制造商:AKM 制造商全稱:AKM 功能描述:16bit CODEC with built-in ALC and MIC/HP-Amp |
| AK4562 | 制造商:AKM 制造商全稱:AKM 功能描述:EVALUATION BOARD REV.A FOR AK4562 |
| AK4562VN | 制造商:AKM 制造商全稱:AKM 功能描述:LOW POWER 20BIT CODEC WITH PGA |
| AK4563A | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power 16bit 4ch ADC & 2ch DAC with ALC |
| AK4563AVF | 制造商:AKM 制造商全稱:AKM 功能描述:Low Power 16bit 4ch ADC & 2ch DAC with ALC |
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