lm49370rl National Semiconductor Corporation, lm49370rl Datasheet - Page 43

• 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
6:3
12.28 DETECT CONFIGURATION REGISTER
This register is used to control the headset detection system.
0
1
2
DBNC_TIME
TEMP_INT
DET_INT
BTN_INT
Field
HS_
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.
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.
If set, an IRQ is raised during a temperature event. The LM49370 will still automatically cycle the class AB
power amplifiers off if the internal temperature is too high. This bit should not be set whenever the class
D amplifier is turned on. Clearing this bit will clear an IRQ that has been triggered by a temperature event.
This 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
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
TABLE 30. DETECT (0x17h)
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
43
Description
Time (ms)
1024
1536
2048
128
192
256
384
512
768
16
32
48
64
96
0
8
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