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WM8904ECS/R 数据表(PDF) 73 Page - Wolfson Microelectronics plc

部件名 WM8904ECS/R
功能描述  Ultra Low Power CODEC for Portable Audio Applications
PDF  188 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8904ECS/R 数据表(HTML) 73 Page - Wolfson Microelectronics plc

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Pre-Production
WM8904
w
PP, Rev 3.3, September 2012
73
SEQUENCE
HEADPHONE ENABLE
LINEOUT ENABLE
Step 1
HPL_ENA = 1
HPR_ENA = 1
LINEOUTL_ENA = 1
LINEOUTR_ENA = 1
Step 2
HPL_ENA_DLY = 1
HPR_ENA_DLY = 1
LINEOUTL_ENA_DLY = 1
LINEOUTR_ENA_DLY = 1
Step 3
DC offset correction
DC offset correction
Step 4
HPL_ENA_OUTP = 1
HPR_ENA_OUTP = 1
LINEOUTL_ENA_OUTP = 1
LINEOUTR_ENA_OUTP = 1
Step 5
HPL_RMV_SHORT = 1
HPR_RMV_SHORT = 1
LINEOUTL_RMV_SHORT = 1
LINEOUTR_RMV_SHORT = 1
Table 41 Headphone / Line Output Enable Sequence
SEQUENCE
HEADPHONE DISABLE
LINEOUT DISABLE
Step 1
HPL_RMV_SHORT = 0
HPR_RMV_SHORT = 0
LINEOUTL_RMV_SHORT = 0
LINEOUTR_RMV_SHORT = 0
Step 2
HPL_ENA = 0
HPL_ENA_DLY = 0
HPL_ENA_OUTP = 0
HPR_ENA = 0
HPR_ENA_DLY = 0
HPR_ENA_OUTP = 0
LINEOUTL_ENA = 0
LINEOUTL_ENA_DLY = 0
LINEOUTL_ENA_OUTP = 0
LINEOUTR_ENA = 0
LINEOUTR_ENA_DLY = 0
LINEOUTR_ENA_OUTP = 0
Table 42 Headphone / Line Output Disable Sequence
The registers relating to Headphone / Line Output pop suppression control are defined in Table 43.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R90 (5Ah)
Analogue
HP 0
7
HPL_RMV_SHOR
T
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.
6
HPL_ENA_OUTP
0
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.
5
HPL_ENA_DLY
0
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.



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