參數(shù)資料
型號: WM8716
廠商: Wolfson Microelectronics
英文描述: High Performance 24-bit, 192kHz Stereo DAC
中文描述: 高性能24位,192kHz的立體聲DAC
文件頁數(shù): 9/21頁
文件大?。?/td> 351K
代理商: WM8716
Production Data
WM8716
WOLFSON MICROELECTRONICS LTD
PD Rev 3.1 April 2001
9
8 X FS INPUT SAMPLE RATE
Due to the higher speed of the interface in 8 x fs mode, audio data is input on two pins. The MODE
pin (pin 24) is used as the second input for the right channel data and left data is input on DIN (pin 2).
In this mode, software control of the device is not available. The data can be input in two formats, left
or right justified, selectable by ML/I2S and two word lengths (20 or 24 bit), selectable by CSBIWO. In
both modes the data is always clocked in MSB first.
For left justified data the word start is marked by the falling edge of LRCIN. The data is clocked in on
the next 20/24 BCKIN rising edges. This format is compatible with devices such as the PMD100.
For right justified the data is justified to the rising edge of LRCIN and the data is clocked in on the
preceding 20/24 BCKIN rising edges before the LRCIN rising edge. This format is compatible with
devices such as the DF1704 or SM5842.
In both modes the polarity of LRCIN can be switched using MD/DM0.
Differential hardware mode can be used in conjunction with 8fs mode by setting the DIFFHW
pin high. In differential 8fs mode the data is input on DIN and output differentially. MODE is unused
and must be tied low.
LRCIN (PIN 1)
LEFT AUDIO
DATA DIN
(PIN 2)
RIGHT AUDIO
DATA MODE
(PIN 24)
BCKIN (PIN 3)
1/8fs
B19
B22
B23
B20
B21
B2
B1
B0
B23
B22
B21
B20
B19
B22
B23
B20
B21
B2
B1
B0
B23
B22
B21
B20
LRCIN (PIN 1)
LEFT AUDIO
DATA DIN
(PIN 2)
RIGHT AUDIO
DATA MODE
(PIN 24)
BCKIN (PIN 3)
1/8fs
B19
B22
B23
B20
B21
B2
B1
B0
B19
B22
B23
B20
B21
B2
B1
B0
Figure 5 Audio Data Input Format (8 x fs Operation)
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