Production Data
WM8945
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
SPKL_SPKVDD
_ENA
0
SPKOUTL enable
10
0 = Disabled
1 = Enabled
Note that SPKOUTL is also
controlled by SPKL_OP_ENA.
When powering down SPKOUTL,
the SPKL_SPKVDD_ENA bit should
be reset first
SPKR_OP_ENA
0
SPKOUTR enable
0 = Disabled
7
1 = Enabled
Note that SPKOUTR is also
controlled by
SPKR_SPKVDD_ENA. When
powering up SPKOUTR, the
SPKR_OP_ENA bit should be
enabled first.
SPKL_OP_ENA
0
SPKOUTL enable
0 = Disabled
6
1 = Enabled
Note that SPKOUTL is also
controlled by SPKL_SPKVDD_ENA.
When powering up SPKOUTL, the
SPKL_OP_ENA bit should be
enabled first
SPKR_MIX_
ENA
0
0
0
Right speaker output mixer enable
0 = Disabled
3
2
1
1 = Enabled
SPKL_MIX_ENA
DACR_ENA
Left speaker output mixer enable
0 = Disabled
1 = Enabled
Right DAC Enable
0 = Disabled
1 = Enabled
DACR_ENA must be set to 1 when
processing right channel data from
the DAC or Digital Beep Generator.
DACL_ENA
0
Left DAC Enable
0 = Disabled
1 = Enabled
0
DACR_ENA must be set to 1 when
processing left channel data from
the DAC or Digital Beep Generator.
Table 68 Power Management Control
THERMAL SHUTDOWN
The WM8945 incorporates a temperature sensor which detects when the device temperature is within
normal limits. The temperature status can be read at any time from the TEMP_STS bit, as described
in Table 69. This bit can be polled at any time, or may output directly on a GPIO pin, or may be used
to generate Interrupt events.
The temperature sensor can be configured to shut down the speaker outputs in the event of an
overtemperature condition. This is configured using the THERR_ACT register field.
PD, May 2011, Rev 4.1
103
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
