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LM49150 Datasheet(PDF) 17 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM49150
Description  Mono Class D Audio Subsystem with Earpiece Driver and Stereo Ground Referenced Headphone Amplifiers
PDF  28 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM49150 Datasheet(HTML) 17 Page - National Semiconductor (TI)

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FIGURE 4. Start and Stop Diagram
TABLE 1. Chip Address
B7
B6
B5
B4
B3
B2
B1
B0 (R/W)
Chip
Address
1
1
1
1
1
0
0
0
TABLE 2. Control Registers
B7
B6
B5
B4
B3
B2
B1
B0
Shutdown Control
0
0
Spread
Spectrum
GAMP_SD
0
I2CV
DD_SD
Turn_On
_Time
PWR_On
Output Mode Control
0
1
EP
Bypass
HPR_SD
MC3
(HP L&R)
MC2
(HP Mono)
MC1
(LS L&R)
MC0
(LS Mono)
Output Gain Control
1
0
0
INPUT_MUTE
LS_GAIN
HP_GAIN2
HP_GAIN1
HP_GAIN0
Mono Input Volume
Control
1
0
1
MG4
MG3
MG2
MG1
MG0
Left Input Volume
Control
1
1
0
LG4
LG3
LG2
LG1
LG0
Right Input Volume
Control
1
1
1
RG4
RG3
RG2
RG1
RG0
TABLE 3. Shutdown Control Register
Bit
Name
Value
Description
B5
Spread Spectrum
0
Spread Spectrum Disabled
1
Spread Spectrum Enabled
B4
GAMP_SD
0
Normal Operation
1
Disables the gain amplifiers that are not in use, to minimize I
DD.
Recommended for Output Modes 1, 2, 4, 5, 8, 10
B3
0
B2
I2CV
DD_SD
0
I2CV
DD acts as an active low RESET input. If I
2CV
DD drops below
1.1V, the device resets and the I2C registers are restored to their
default state.
1
Normal Operation. I2CV
DD voltage does not reset the device.
B1
Turn_On_Time
0
Normal Turn-On Time (27ms)
1
Fast Turn-On Time (15ms)
B0
PWR_On
0
Device Disabled
1
Device Enabled
TABLE 4. Output Mode Control Register
Bit
Name
Value
Description
B5
EP Bypass
0
Normal Output Mode Operation
1
Speaker and Headphone amplifier goes into shutdown mode and
enables Receiver Bypass path
B4
HPR_SD
0
Normal Operation
1
Disables Right Headphone Output
17
www.national.com



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