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參數(shù)資料
| 型號： | XWM8711EDS |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | Internet Audio DAC with Integrated Headphone Driver |
| 中文描述： | 互聯(lián)網(wǎng)音頻DAC集成耳機驅(qū)動器 |
| 文件頁數(shù)： | 24/36頁 |
| 文件大小： | 379K |
| 代理商： | XWM8711EDS |
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WM8711
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WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 November 2000
24
USB MODE SAMPLE RATES
In USB mode the MCLK input is 12MHz only.
SAMPLING
RATE
DAC
KHz
48
MCLK
FREQUENCY
SAMPLE
RATE
REGISTER SETTINGS
DIGITAL
FILTER
TYPE
MHz
12.000
BOSR
0
SR3
0
SR2
0
SR1
0
SR0
0
0
44.1
(Note 2)
8
12.000
1
1
0
0
0
1
12.000
0
0
0
0
1
0
8
(Note 1)
32
12.000
1
1
0
0
1
1
12.000
0
0
1
1
0
0
96
12.000
0
0
1
1
1
3
88.2
(Note 3)
12.000
1
1
1
1
1
2
Table 14 USB Mode Sample Rate Look-Up Table
Notes:
1.
8k not exact, actual = 8.021kHz
2.
44.1k not exact, actual = 44.118kHz
3.
88.1k not exact, actual = 88.235kHz
4.
All other combinations of BOSR and SR[3:0] that are not in the truth table are invalid
The BOSR bit represents the base over-sampling rate. This is the rate that the WM8711 digital signal
processing is carried out at and the sampling rate will always be a sub-multiple of this. In USB mode,
with BOSR = 0, the base over-sampling rate is defined at 250Fs, with BOSR = 1, the base over-
sampling rate is defined at 272Fs. This can be used to determine the actual audio sampling rate
required by the DAC.
The exact sample rates supported for all combinations are defined by the relationships in Table 15
below.
ACTUAL SAMPLING RATE
BOSR=0
( 250FS)
KHz
8
TARGET
SAMPLING
RATE
BOSR=1
(272FS)
KHz
8.021
KHz
8
12MHz/(250 x 48/8)
32
12MHz/(272 x 11/2)
not available
32
12MHz/(250 x 48/32)
not available
44.117
44.1
12MHz/272
not available
48
48
12MHz/250
not available
88.235
88.2
12MHz/136
not available
96
96
12MHz/125
Table 15 USB Mode Actual Sample Rates
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| XWM8722EDS | Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XWM8721EDS | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Internet Audio DAC with Integrated Headphone Driver |
| XWM8721EDS/R | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Internet Audio DAC with Integrated Headphone Driver |
| XWM8722EDS | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs |
| XWM8728EDS | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz Stereo DAC with Volume Control |
| XWM8728EDS/R | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz Stereo DAC with Volume Control |
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