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參數(shù)資料
| 型號(hào)： | AS3543-ECTP |
| 廠商： | ams |
| 文件頁(yè)數(shù)： | 13/92頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC CODEC AUDIO FRONT END 68CTBGA |
| 標(biāo)準(zhǔn)包裝： | 4,000 |
| 類型： | 音頻編解碼器 |
| 應(yīng)用： | 便攜式音頻，電話 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 68-TFBGA |
| 供應(yīng)商設(shè)備封裝： | 68-CTBGA（6x6） |
| 包裝： | 帶卷 (TR) |
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www.austriamicrosystems.com
Revision 1.11
19 - 91
AS3543 3v2
Data Sheet - D e t a i l e d D e s c r i p t i o n - A u d i o F u n c t i o n s
8.2.7
Register Description
8.3
Line Output
8.3.1
General
The line output is designed to provide the audio signal with a typical VPEAK level at a load of minimum 10k, which is a
minimum value for line inputs. If the limiters (N20/N21) are deactivated the peak output voltage is AVDD17/2 Vp.
This AFE has a combined output stage for headphone and line output with an independent gain regulation for left and
right channel with 32 steps @ 1.5dB each. The gain can be set from -40.5dB to +6dB.
If the line output is not enabled, the volume settings are set to their default values. Changing of volume and mute con-
trol can only be done after enabling the output.
Figure 5. Line Output
8.3.2
Auto Fading
By setting a new output volume level, the stage does a automatic fading from the current gain setting to the new target.
Changing the input multiplexer from one source to another will be done by fadeing out to mute, source changing and
fading in of the new source to the target volume. Change from HPH-out to LINE-out is done by fading out of HPH-out
to mute and fading in of the LINE-out to the target volume.
The fading speed can be programmed to 3 different speed levels. The immediate response can be selected as 4th
state.
8.3.3
Ground Noise Cancelation
A separate ground input allows to connect a ground sense line direct from the dock connector ground or line out jack
shield to make the audio output independent from PCB ground noise.
Table 10. Microphone Input Related Register
Name
Base
Offset
Description
2-wire serial
06h
Right Microphone Input volume settings, AGC control
2-wire serial
07h
Left Microphone Input volume settings, MIC supply control
2-wire serial
14h
Enable/disable driver stage
2-wire serial
16h
Enable/disable mixer input
2-wire serial
24h
Interrupt settings for microphone voice activation
2-wire serial
26h
Interrupt settings for microphone detection
2-wire serial
27h
Interrupt settings for remote button press detection
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