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CS43130 датащи(PDF) 89 Page - Cirrus Logic

номер детали CS43130
подробное описание детали  130-dB, 32-Bit High-Performance DAC with Integrated Headphone Driver
PDF  137 Pages
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производитель  CIRRUS [Cirrus Logic]
домашняя страница  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS43130 датащи(HTML) 89 Page - Cirrus Logic

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DS1073F1
89
CS43130
5.11 Headphone Load Measurement
5.11.4 Disabling the Impedance Measurement Subsystem
Fig. 5-5 shows and Ex. 5-23 describes the steps necessary for enabling the impedance measurement subsystem.
Figure 5-5. Disabling the Impedance Measurement Subsystem Flowchart
Example 5-23. Sequence for Disabling the Impedance Measurement Subsystem
STEP
TASK
REGISTER/BIT FIELDS
VALUE
DESCRIPTION
1 Disable DC impedance measurement
HP Load 1. 0xE0000
0x90
HPLOAD_EN
Reserved
HPLOAD_CHN_SEL
Reserved
HPLOAD_AC_START
HPLOAD_DC_START
1
00
1
00
0
0
HPOUTB selected
Stop DC impedance measurement
2 To continue with measuring AC impedance, see Section 5.11.3. To end measurement, go to the next step.
3 Disable impedance measurement
4 Restore defaults
0x10010
0x99
0x1002C
0x00
0x10010
0x00
Disable Impedance Measurement
Subsystem
Disable both AC/DC
Impedance Measurement
HPLOAD_AC_ START = 0
HPLOAD_DC_START = 0
Turn off Impedance
Measurement Subsystem
HPLOAD_EN = 0
Disable HPLOAD Interrupts
HPLOAD _NO_DC_INT_MASK= 1
HPLOAD_UNPLUG_INT_MASK = 1
HPLOAD_OOR _INT_MASK = 1
HPLOAD_DC_DONE_INT_MASK = 1
HPLOAD_AC_ DONE_INT_MASK = 1
HPLOAD_OFF_INT_MASK = 1
HPLOAD _ON_INT_MASK = 1
Restore Defaults
0x10010 = 0x99
0x1002 C = 0x00
0x100010 = 0x00
HPLOAD_OFF_INT
= 1?
YES
NO
Reset AC frequency
HPLOAD _MEAS_FREQ_LSB = 0x00
HPLOAD_MEAS_FREQ_MSB = 0x00



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