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LM4935 Datasheet(PDF) 49 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4935
Description  Audio Sub-System with Dual-Mode Stereo Headphone and Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
PDF  112 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4935 Datasheet(HTML) 49 Page - National Semiconductor (TI)

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12.0 Status & Control Registers (Continued)
12.28 DETECT CONFIGURATION REGISTER
This register is used to control the headset detection system.
TABLE 29. DETECT (0x17h)
Bits
Field
Description
0
DET_INT
If set an IRQ is raised when a change is detected in the headset status. Clearing this bit will clear
an IRQ that has been triggered by the headset detect.
1
BTN_INT
If set an IRQ is raised when the headset button is pressed. Clearing this bit will clear an IRQ that
has been triggered by a button event.
2
TEMP_INT
If set an IRQ is raised during a temperature event. If cleared, the LM4935 will still automatically
cycle the power amplifiers off if the internal temperature is too high. This bit should not be set
whenever the loudspeaker amplifier is turned on. Clearing this bit will clear an IRQ that has been
triggered by a temperature event.
6:3
HS_
DBNC_TIME
Sets the time used for debouncing the analog signals from the detection inputs used to sense the
insertion/removal of a headset.
HS_DBNC_TIME
Time (ms)
0000
2
0
0001
2
8
0010
2
16
0011
2
32
0100
2
48
0101
2
64
0110
2
96
0111
2
128
1000
2
192
1001
2
256
1010
2
384
1011
2
512
1100
2
768
1101
2
1024
1110
2
1536
1111
2
2048
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