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WM8778EDS/R 데이터시트(PDF) 25 Page - Wolfson Microelectronics plc

부품명 WM8778EDS/R
상세설명  24 BIT 192KHZ STEREO CODEC
PDF  50 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8778EDS/R 데이터시트(HTML) 25 Page - Wolfson Microelectronics plc

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Product Preview
WM8778
w
PP Rev 1.7 June 2004
25
MASTER MODE ADCLRC/DACLRC FREQUENCY SELECT
In ADC Master mode the WM8778 generates ADCLRC and ADCBCLK, in DAC master mode the
WM8778 generates DACLRC and DACBCLK. These clocks are derived from the master clock
(ADCMCLK or DACMCLK). The ratios of ADCMCLK to ADCLRC and DACMCLK to DACLRC are
set by ADCRATE and DACRATE respectively.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
2:0
ADCRATE[2:0]
010
Master Mode MCLK:ADCLRC
Ratio Select:
010: 256fs
011: 384fs
100: 512fs
101: 768fs
R12 (0Ch)
0001100
ADCLRC and DACLRC
Frequency Select
6:4
DACRATE[2:0]
010
Master Mode MCLK:DACLRC
Ratio Select:
000: 128fs
001: 192fs
010: 256fs
011: 384fs
100: 512fs
101: 768fs
ADC OVERSAMPLING RATE SELECT
For ADC operation at 96kHz it is recommended that the user set the ADCOSR bit. This changes the
ADC signal processing oversample rate to 64fs.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R12 (0Ch)
0001100
ADC Oversampling Rate
3
ADCOSR
0
ADC Oversampling Rate Select
0: 128x oversampling
1: 64x oversampling
MUTE MODES
Setting MUTE for the DAC will apply a ‘soft’ mute to the input of the digital filters of the channel
muted.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R8 (08h)
0001000
DAC Mute
0
DMUTE
0
DAC Soft Mute Select
0 : Normal Operation
1: Soft mute enabled



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