參數(shù)資料
型號(hào)： XWM9708CDS
廠商： Wolfson Microelectronics
元件分類(lèi)： Codec
英文描述： AC97 Revision 2.1 Audio Codec
中文描述： AC97音頻編解碼器2.1版
文件頁(yè)數(shù)： 14/28頁(yè)
文件大?。?/td> 205K
代理商： XWM9708CDS
WM9708
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 April 2001
14
When the Codec is a slave device, bits 14 and 13 are not used to validate data in slots 1 and 2.
Instead, if the message ID bits (1:0) match the Codec ID then the address is valid and bit 19 from
slot 1 then indicates if slot 2 is valid.
SYNC
BIT_CLK
SDATA_OUT
VALID
FRAME
SLOT (1)
SLOT (2)
WM9707 SAMPLES
SYNC ASSERTION HERE
WM9707 SAMPLES
FIRST SDATA_OUT
BIT OF FRAME HERE
END OF PREVIOUS AUDIO FRAME
Figure 10 Start of an Audio Output Frame
A new audio output frame begins with a low to high transition of SYNC as shown in Figure 10. SYNC
is synchronous to the rising edge of BITCLK. On the immediately following falling edge of BITCLK,
the WM9708 samples the assertion of SYNC. This falling edge marks the time when both sides of
AC-link are aware of the start of a new audio frame. On the next rising edge of BITCLK, AC
’
97
transitions SDATAOUT into the first bit position of slot 0 (Valid Frame bit). Each new bit position is
presented to AC-link on a rising edge of BITCLK, and subsequently sampled by the WM9708 on the
following falling edge of BITCLK. This sequence ensures that data transitions and subsequent
sample points for both incoming and outgoing data streams are time aligned.
Baseline AC
’
97 specified audio functionality MUST ALWAYS sample rate convert to and from a fixed
48ks/s on the AC
’
97 controller. This requirement is necessary to ensure that interoperability between
the AC
’
97 controller and the WM9708, among other things, can be guaranteed by definition for
baseline specified AC
’
97 features.
SDATAOUT
’
s composite stream is MSB justified (MSB first) with all non-valid slot bit positions
stuffed with 0s by the AC
’
97 controller.
In the event that there are less than 20 valid bits within an assigned and valid time slot, the AC
’
97
controller always stuffs all trailing non-valid bit positions of the 20-bit slot with 0s.
相關(guān)PDF資料
PDF描述
XWT1205 High Power Package Trim and Enable Pin
XWT2405-12 High Power Package Trim and Enable Pin
XWT2405-15 High Power Package Trim and Enable Pin
XWT4805-12 High Power Package Trim and Enable Pin
XWT4805-15 High Power Package Trim and Enable Pin
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XWM9710EFL/RV 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:AC97 Audio CODEC and Mixer with Integrated Headphone Driver
XWM9710EFL/V 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:AC97 Audio CODEC and Mixer with Integrated Headphone Driver
XWM9710EFT/RV 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:AC97 Audio CODEC and Mixer with Integrated Headphone Driver
XWM9710EFT/V 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:AC97 Audio CODEC and Mixer with Integrated Headphone Driver
XWP13006S 制造商:Electro-Term/Hollingsworth 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*