wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 80

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8918
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Writing a logic 1 to DCS_TRIG_SERIES_n initiates a series of DC offset measurements and applies
the necessary correction to the associated output. The number of DC Servo operations performed is
determined by DCS_SERIES_NO_01 or DCS_SERIES_NO_23. A maximum of 128 operations may
be selected, though a much lower value will be sufficient in most applications.
The DC Servo control fields associated with active modes (suitable for use on a signal path that is in
active use) are described in Table 49.
R68 (44h)
DC Servo 1
REGISTER
DC Servo 4
ADDRESS
R71 (47h)
BIT
6:0
15
14
13
12
11
10
9
8
DCS_TRIG_SING
DCS_TRIG_SING
DCS_TRIG_SING
DCS_TRIG_SING
DCS_TRIG_SERI
DCS_TRIG_SERI
DCS_TRIG_SERI
DCS_TRIG_SERI
DCS_SERIES_N
O_23 [6:0]
LABEL
ES_3
ES_2
ES_1
ES_0
LE_3
LE_2
LE_1
LE_0
DEFAULT
010_1010
0
0
0
0
0
0
0
0
Writing 1 to this bit selects a single DC
offset correction for LINEOUTR.
In readback, a value of 1 indicates that
the DC Servo single correction is in
progress.
Writing 1 to this bit selects a single DC
offset correction for LINEOUTL.
In readback, a value of 1 indicates that
the DC Servo single correction is in
progress.
Writing 1 to this bit selects a single DC
offset correction for HPOUTR.
In readback, a value of 1 indicates that
the DC Servo single correction is in
progress.
Writing 1 to this bit selects a single DC
offset correction for HPOUTL.
In readback, a value of 1 indicates that
the DC Servo single correction is in
progress.
Writing 1 to this bit selects a series of
DC offset corrections for LINEOUTR.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
Writing 1 to this bit selects a series of
DC offset corrections for LINEOUTL.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
Writing 1 to this bit selects a series of
DC offset corrections for HPOUTR.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
Writing 1 to this bit selects a series of
DC offset corrections for HPOUTL.
In readback, a value of 1 indicates that
the DC Servo DAC Write correction is
in progress.
Number of DC Servo updates to
perform in a series event for
LINEOUTL/LINEOUTR.
0 = 1 updates
1 = 2 updates
...
127 = 128 updates
PD, Rev 4.0, September 2010
DESCRIPTION
Production Data
80