WM8904
Pre-Production
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
DC Servo DAC Write status
REFER TO
DC Servo
7:4
DCS_DAC_WR_
COMPLETE [3:0]
0000
[3] - LINEOUTR
[2] - LINEOUTL
[1] - HPOUTR
[0] - HPOUTL
0 = DAC Write DC Servo mode not completed.
1 = DAC Write DC Servo mode complete.
DC Servo Start-Up status
[3] - LINEOUTR
DC Servo
3:0
DCS_STARTUP
_COMPLETE
[3:0]
0000
[2] - LINEOUTL
[1] - HPOUTR
[0] - HPOUTL
0 = Start-Up DC Servo mode not completed..
1 = Start-Up DC Servo mode complete.
Register 4Dh DC Servo Readback 0
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
Removes HPOUTL short
0 = HPOUTL short enabled
1 = HPOUTL short removed
Pop Suppression
Control
R90 (5Ah)
Analogue
HP 0
7
HPL_RMV_SHO
RT
0
For normal operation, this bit should be set as the
final step of the HPL Enable sequence.
Enables HPOUTL output stage
0 = Disabled
Pop Suppression
Control
6
5
HPL_ENA_OUT
P
0
0
1 = Enabled
For normal operation, this bit should be set to 1 after
the DC offset cancellation has been scheduled.
Enables HPOUTL intermediate stage
0 = Disabled
Pop Suppression
Control
HPL_ENA_DLY
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 HPOUTL input stage
0 = Disabled
Pop Suppression
Control
4
3
2
HPL_ENA
0
0
0
1 = Enabled
For normal operation, this bit should be set as the
first step of the HPL Enable sequence.
Removes HPOUTR short
0 = HPOUTR short enabled
1 = HPOUTR short removed
Pop Suppression
Control
HPR_RMV_SHO
RT
For normal operation, this bit should be set as the
final step of the HPR Enable sequence.
Enables HPOUTR output stage
0 = Disabled
Pop Suppression
Control
HPR_ENA_OUT
P
1 = Enabled
For normal operation, this bit should be set to 1 after
the DC offset cancellation has been scheduled.
PP, Rev 3.3, September 2012
164
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
