wm8953 Wolfson Microelectronics plc, wm8953 Datasheet - Page 40

• Manufacturer Part Number: wm8953
• Description: Low Power Stereo Adc With Pll And Tdm Interface Low Power Stereo Adc With Pll And Tdm Interface
• Manufacturer: Wolfson Microelectronics plc

WM8953
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THERMAL SENSING
The polarity of each ADC output signal can be changed under software control using the
ADCL_DATINV and ADCR_DATINV register bits. The AIFADCL_SRC and AIFADCR_SRC register
bits may be used to select which ADC is used for the left and right digital audio interface data. These
register bits are described in Table 17.
Table 17 ADC Routing and Control
The WM8953 incorporates a thermal sensor in order to provide protection from overheating. The
sensor is enabled by setting TSHUT_ENA. The status of the thermal sensor can be output on a
GPIO pin and/or read from the GPIO registers. Alternatively, the temperature sensor can be
configured to cause an Interrupt event. See “General Purpose Input/Output” for further details.
Note that, if thermal shutdown is required, this must be implemented by the host processor, in
response to the thermal status indication generated by the WM8953.
Table 18 Thermal Shutdown
R4 (04h)
R14 (0Eh)
R2 (02h)
REGISTER
ADDRESS
REGISTER
ADDRESS
15
14
1
0
BIT
14
BIT
AIFADCL_SRC
AIFADCR_SRC
ADCL_DATINV
ADCR_DATINV
TSHUT_ENA
(rw)
LABEL
LABEL
DEFAULT
0b
1b
0b
0b
1b
DEFAULT
Left Digital Audio channel source
0 = Left ADC data is output on left channel
1 = Right ADC data is output on left channel
Right Digital Audio channel source
0 = Left ADC data is output on right channel
1 = Right ADC data is output on right channel
Left ADC Invert
0 = Left ADC output not inverted
1 = Left ADC output inverted
Right ADC Invert
0 = Right ADC output not inverted
1 = Right ADC output inverted
Thermal Sensor Enable
0 = Thermal sensor disabled
1 = Thermal sensor enabled
DESCRIPTION
DESCRIPTION
PD, January 2009, Rev 4.0
Production Data
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