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WM8772EFT/R 데이터시트(PDF) 31 Page - Wolfson Microelectronics plc

부품명 WM8772EFT/R
상세설명  24 BIT 192KHZ 6 CHANNEL CODEC WITH VOLUME CONTROL
PDF  70 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8772EFT/R 데이터시트(HTML) 31 Page - Wolfson Microelectronics plc

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Production Data
WM8772EDS – 28 PIN SSOP
w
PD Rev 4.1 October 2004
31
DAC OUTPUT PHASE
The DAC Phase control word determines whether the output of each DAC is non-inverted or inverted
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
Bit
DAC
Phase
0
DAC1L/R
1 = invert
1
DAC2L/R
1 = invert
0000011
DAC Phase
8:6
PHASE
[2:0]
000
2
DAC3L/R
1 = invert
DIGITAL ZERO CROSS-DETECT
The Digital volume control also incorporates a zero cross detect circuit which detects a transition
through the zero point before updating the digital volume control with the new volume. This is
enabled by control bit DZCEN.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0001001
DAC Control
0
ZCD
0
DAC Digital Volume Zero Cross
Disable:
0: Zero cross detect enabled
1: Zero cross detect disabled
MUTE FLAG OUTPUT
The DZFM control bits allow the selection of the six DAC channel zero flag bits for output on the
MUTEB pin. A ‘1’ on MUTE indicates 1024 consecutive zero input samples to the DAC channels
selected.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0001001
Zero Flag
2:1
DZFM[1:0]
00
Selects the output MUTE pin (A ‘1’
indicates 1024 consecutive zero
input samples on the DAC channels
selected.
00: All channels zero
01: Channel 1 zero
10: Channel 2 zero
11: Channel 3 zero
DAC MUTE MODES
The WM8772EDS has individual mutes for each of the three DAC channels. Setting MUTE for a
channel will apply a ‘soft’ mute to the input of the digital filters of the channel muted.
REGISTER ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0001001
DAC Mute
5:3
DMUTE
[2:0]
000
DAC Soft Mute Select
DMUTE [2:0]
DAC CHANNEL 1
DAC CHANNEL 2
DAC CHANNEL 3
000
Not MUTE
Not MUTE
Not MUTE
001
MUTE
Not MUTE
Not MUTE
010
Not MUTE
MUTE
Not MUTE
011
MUTE
MUTE
Not MUTE
100
Not MUTE
Not MUTE
MUTE
101
MUTE
Not MUTE
MUTE
110
Not MUTE
MUTE
MUTE



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