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| 型号： | WLA49VVA |
| 厂商： | National Semiconductor Corporation |
| 元件分类： | ADC |
| 英文描述： | Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC |
| 中文描述： | 音频子系统的双模单声道立体声耳机和扬声器放大器的高效率和多功能模数转换器 |
| 文件页数： | 62/112页 |
| 文件大小： | 5017K |
| 代理商： | WLA49VVA |
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12.0 Status & Control Registers (Continued)
12.30 STATUS REGISTER
This register is used to report the status of the device.
TABLE 30. STATUS (0x18h)
Bits
Field
Description
0
HEADSET
This field is high when headset presence is detected (only valid if the detection system is
enabled). (Note 29)
1
STEREO_
HEADSET
This field is high when a headset with stereo speakers is detected (only valid if the detection
system is enabled). (Note 29)
2
MIC
This field is high when a headset with a microphone is detected (only valid if the detection system
is enabled). (Note 29)
3
BTN
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.
4
SAR TRIG 1
If this field is high then an event has happened on SAR trigger 1 (write to this register to clear
IRQ).
5
SAR TRIG 2
If this field is high then an event has happened on SAR trigger 2 (write to this register to clear
IRQ).
6
TEMP
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.
7
GPIN
When GPIO_SEL is set to a readable configuration a digital input on GPIO1 can be read back
here.
Note 29: The detection IRQ is cleared when this register has been written to.
LM4935
www.national.com
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