lm49370rl National Semiconductor Corporation, lm49370rl Datasheet - Page 47

• Manufacturer Part Number: lm49370rl
• Description: Audio Sub-system With An Ultra Low Emi, Spread Spectrum, Class D Loudspeaker Amplifier, A Dual-mode Stereo Headphone Amplifier, And A Dedicated Pcm Interface For Bluetooth Transceivers
• Manufacturer: National Semiconductor Corporation

Bits
12.30 STATUS REGISTER
This register is used to report the status of the device.
Note 30: The detection IRQ is cleared when this register has been written to.
Note 31: This field is cleared whenever the STATUS (0x18h) register has been written to.
0
1
2
3
4
5
6
HEADSET
STEREO_
HEADSET
GPIN1
GPIN2
TEMP
Field
BTN
MIC
This field is high when headset presence is detected (only valid if the detection system is enabled). (Note
30)
This field is high when a headset with stereo speakers is detected (only valid if the detection system is
enabled). (Note 30)
This field is high when a headset with a microphone is detected (only valid if the detection system is
enabled). (Note 30)
This field is high when the button on the headset is pressed (only valid if the detection system is enabled).
IRQ is cleared when the button has been released and this register has been written to. (Note 31)
If this field is high then a temperature event has occurred (write to this register to clear IRQ). This field will
stay high even when the IRQ is cleared so long as the event occurs. This bit is only valid whenever the
loudspeaker amplifier is turned off. (Note 31)
When GPIO_SEL is set to a readable configuration a digital input on GPIO1 can be read back here.
When GPIO_SEL is set to a readable configuration, a digital input on the relevant GPIO can be read back
here.
TABLE 31. STATUS (0x18h)
47
Description
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