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WM8778EDS/R Scheda tecnica(PDF) 24 Page - Wolfson Microelectronics plc

Il numero della parte WM8778EDS/R
Spiegazioni elettronici  24 BIT 192KHZ STEREO CODEC
PDF  50 Pages
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Produttore elettronici  WOLFSON [Wolfson Microelectronics plc]
Homepage  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8778EDS/R Scheda tecnica(HTML) 24 Page - Wolfson Microelectronics plc

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WM8778
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w
PP Rev 1.7 June 2004
24
The WL[1:0] bits are used to control the input word length.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R10 (0Ah)
0001010
DAC Interface Control
5:4
DACWL
[1:0]
10
R11 (0Bh)
0001011
ADC Interface Control
5:4
ADCWL
[1:0]
10
Word Length
00 : 16 bit data
01: 20 bit data
10: 24 bit data
11: 32 bit data
Note: If 32-bit mode is selected in right justified mode, the WM8778 defaults to 24 bits.
In all modes, the data is signed 2's complement. The digital filters always input 24-bit data. If the
DAC is programmed to receive 16 or 20 bit data, the WM8778 pads the unused LSBs with zeros. If
the DAC is programmed into 32 bit mode, the 8 LSBs are ignored.
Note: In 24 bit I
2S mode, any width of 24 bits or less is supported provided that ADCLRC/DACLRC is
high for a minimum of 24 BCLKs and low for a minimum of 24 BCLKs.
A number of options are available to control how data from the Digital Audio Interface is applied to
the DAC.
MASTER MODES
Control bit ADCMS selects between audio interface Master and Slave Modes for ADC. In ADC
Master mode ADCLRC and ADCBCLK are outputs and are generated by the WM8778. In Slave
mode ADCLRC and ADCBCLK are inputs to WM8778.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R12 (0Ch)
0001100
Interface Control
8
ADCMS
0
Audio Interface Master/Slave Mode
select for ADC:
0 : Slave Mode
1: Master Mode
Control bit DACMS selects between audio interface Master and Slave Modes for the DAC. In DAC
Master mode DACLRC and DACBCLK are outputs and are generated by the WM8778. In Slave
mode DACLRC and DACBCLK are inputs to WM8778.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R12 (0Ch)
0001100
Interface Control
7
DACMS
0
Audio Interface Master/Slave Mode
select for DAC:
0 : Slave Mode
1: Master Mode



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