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WM8904ECS/R 데이터시트(PDF) 86 Page - Wolfson Microelectronics plc

부품명 WM8904ECS/R
상세설명  Ultra Low Power CODEC for Portable Audio Applications
PDF  188 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8904ECS/R 데이터시트(HTML) 86 Page - Wolfson Microelectronics plc

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WM8904
Pre-Production
w
PP, Rev 3.3, September 2012
86
The DC Servo control fields associated with start-up operation are described in Table 52. It is
important to note that, to minimise audible pops/clicks, the Start-Up and DAC Write modes of DC
Servo operation should be commanded as part of a control sequence which includes muting and
shorting of the headphone outputs; a suitable sequence is defined in the default Start-Up sequence.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R68 (44h)
DC Servo 1
7
DCS_TRIG_STAR
TUP_3
0
Writing 1 to this bit selects Start-Up
DC Servo mode for LINEOUTR.
In readback, a value of 1 indicates that
the DC Servo Start-Up correction is in
progress.
6
DCS_TRIG_STAR
TUP_2
0
Writing 1 to this bit selects Start-Up
DC Servo mode for LINEOUTL.
In readback, a value of 1 indicates that
the DC Servo Start-Up correction is in
progress.
5
DCS_TRIG_STAR
TUP_1
0
Writing 1 to this bit selects Start-Up
DC Servo mode for HPOUTR.
In readback, a value of 1 indicates that
the DC Servo Start-Up correction is in
progress.
4
DCS_TRIG_STAR
TUP_0
0
Writing 1 to this bit selects Start-Up
DC Servo mode for HPOUTL.
In readback, a value of 1 indicates that
the DC Servo Start-Up correction is in
progress.
3
DCS_TRIG_DAC_
WR_3
0
Writing 1 to this bit selects DAC Write
DC Servo mode for LINEOUTR.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
2
DCS_TRIG_DAC_
WR_2
0
Writing 1 to this bit selects DAC Write
DC Servo mode for LINEOUTL.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
1
DCS_TRIG_DAC_
WR_1
0
Writing 1 to this bit selects DAC Write
DC Servo mode for HPOUTR.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
0
DCS_TRIG_DAC_
WR_0
0
Writing 1 to this bit selects DAC Write
DC Servo mode for HPOUTL.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
R67 (43h)
DC Servo 0
3
DCS_ENA_CHAN
_3
0
DC Servo enable for LINEOUTR
0 = disabled
1 = enabled
2
DCS_ENA_CHAN
_2
0
DC Servo enable for LINEOUTL
0 = disabled
1 = enabled
1
DCS_ENA_CHAN
_1
0
DC Servo enable for HPOUTR
0 = disabled
1 = enabled
0
DCS_ENA_CHAN
_0
0
DC Servo enable for HPOUTL
0 = disabled
1 = enabled



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