wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 65

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

Production Data
w
Step 1
Step 2
Step 3
Step 4
Step 5
Table 39 Headphone / Line Output Enable Sequence
Step 1
Step 2
Table 40 Headphone / Line Output Disable Sequence
The registers relating to Headphone / Line Output pop suppression control are defined in Table 41.
R90 (5Ah)
Analogue
HP 0
REGISTER
ADDRESS
SEQUENCE
SEQUENCE
BIT
7
6
5
4
HPL_RMV_SHOR
HPL_ENA_OUTP
HPL_ENA_DLY
HPL_ENA = 1
HPR_ENA = 1
HPL_ENA_DLY = 1
HPR_ENA_DLY = 1
DC offset correction
HPL_ENA_OUTP = 1
HPR_ENA_OUTP = 1
HPL_RMV_SHORT = 1
HPR_RMV_SHORT = 1
HPL_RMV_SHORT = 0
HPR_RMV_SHORT = 0
HPL_ENA = 0
HPL_ENA_DLY = 0
HPL_ENA_OUTP = 0
HPR_ENA = 0
HPR_ENA_DLY = 0
HPR_ENA_OUTP = 0
HPL_ENA
LABEL
HEADPHONE DISABLE
HEADPHONE ENABLE
T
DEFAULT
0
0
0
0
Removes HPL short
0 = HPL short enabled
1 = HPL short removed
For normal operation, this bit should
be set as the final step of the HPL
Enable sequence.
Enables HPL output stage
0 = Disabled
1 = Enabled
For normal operation, this bit should
be set to 1 after the DC offset
cancellation has been scheduled.
Enables HPL intermediate stage
0 = Disabled
1 = Enabled
For normal operation, this bit should
be set to 1 after the output signal path
has been configured, and before DC
offset cancellation is scheduled. This
bit should be set with at least 20us
delay after HPL_ENA.
Enables HPL input stage
0 = Disabled
1 = Enabled
For normal operation, this bit should
be set as the first step of the HPL
Enable sequence.
LINEOUTL_ENA = 1
LINEOUTR_ENA = 1
LINEOUTL_ENA_DLY = 1
LINEOUTR_ENA_DLY = 1
DC offset correction
LINEOUTL_ENA_OUTP = 1
LINEOUTR_ENA_OUTP = 1
LINEOUTL_RMV_SHORT = 1
LINEOUTR_RMV_SHORT = 1
LINEOUTL_RMV_SHORT = 0
LINEOUTR_RMV_SHORT = 0
LINEOUTL_ENA = 0
LINEOUTL_ENA_DLY = 0
LINEOUTL_ENA_OUTP = 0
LINEOUTR_ENA = 0
LINEOUTR_ENA_DLY = 0
LINEOUTR_ENA_OUTP = 0
PD, Rev 4.0, September 2010
LINEOUT DISABLE
LINEOUT ENABLE
DESCRIPTION
WM8918
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