lm4935rlx National Semiconductor Corporation, lm4935rlx Datasheet - Page 50

• Manufacturer Part Number: lm4935rlx
• Description: Audio Sub-system With Dual-mode Stereo Headphone And Mono High Efficiency Loudspeaker Amplifiers And Multi-purpose Adc
• Manufacturer: National Semiconductor Corporation

www.national.com
Bits
12.0 Status & Control Registers
12.28 DETECT CONFIGURATION REGISTER
This register is used to control the headset detection system.
6:3
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. 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.
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
TABLE 29. DETECT (0x17h)
0000
0001
0010
0100
0101
1000
1001
1010
0011
0110
0111
1011
1100
1101
1110
1111
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
(Continued)
50
Description
Time (ms)
1024
1536
2048
128
192
256
384
512
768
16
32
48
64
96
0
8