LM49370RL/NOPB National Semiconductor, LM49370RL/NOPB Datasheet - Page 43
LM49370RL/NOPB
Manufacturer Part Number
LM49370RL/NOPB
Description
IC AUDIO SUBSYSTEM 1.2W 49USMDXT
Manufacturer
National Semiconductor
Series
Boomer®, PowerWise®r
Type
Class Dr
Datasheet
1.LM49370RLNOPB.pdf
(100 pages)
Specifications of LM49370RL/NOPB
Output Type
1-Channel (Mono) with Mono and Stereo Headphones
Max Output Power X Channels @ Load
1.2W x 1 @ 8 Ohm; 52mW x 2 @ 16 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Features
3D, Depop, I²C, I²S, Microphone, Mute, PCM, Shutdown, SPI, Standby, Volume Control
Mounting Type
Surface Mount
Package / Case
49-MicroSMDxt
Dc
07+
For Use With
LM49370RLEVAL - BOARD EVALUATION LM49370RL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM49370RLTR
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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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