lm49150tlx National Semiconductor Corporation, lm49150tlx Datasheet - Page 17

• Manufacturer Part Number: lm49150tlx
• Description: Mono Class D Audio Subsystem With Earpiece Driver And Stereo Ground Referenced Headphone Amplifiers
• Manufacturer: National Semiconductor Corporation

Output Mode Control
Output Gain Control
Mono Input Volume
Right Input Volume
Shutdown Control
Left Input Volume
Address
Chip
Control
Control
Control
Bit
Bit
B5
B4
B5
B4
B3
B2
B1
B0
B7
Spread Spectrum
1
Turn_On_Time
B7
I
EP Bypass
GAMP_SD
0
0
1
1
1
1
2
PWR_On
HPR_SD
CV
Name
Name
DD
B6
_SD
0
1
0
0
1
1
B6
1
Spectrum
Spread
Bypass
B5
EP
0
1
0
1
TABLE 4. Output Mode Control Register
TABLE 3. Shutdown Control Register
FIGURE 4. Start and Stop Diagram
Value
B5
Value
TABLE 2. Control Registers
1
INPUT_MUTE
0
1
0
1
GAMP_SD
TABLE 1. Chip Address
0
1
0
1
0
0
1
0
1
0
1
HPR_SD
MG4
RG4
LG4
B4
Normal Output Mode Operation
Speaker and Headphone amplifier goes into shutdown mode and
enables Receiver Bypass path
Normal Operation
Disables Right Headphone Output
Spread Spectrum Disabled
Spread Spectrum Enabled
Normal Operation
Disables the gain amplifiers that are not in use, to minimize I
Recommended for Output Modes 1, 2, 4, 5, 8, 10
I
1.1V, the device resets and the I
default state.
Normal Operation. I
Normal Turn-On Time (27ms)
Fast Turn-On Time (15ms)
Device Disabled
Device Enabled
B4
2
17
1
CV
DD
(HP L&R)
LS_GAIN
acts as an active low RESET input. If I
MC3
MG3
RG3
LG3
B3
0
B3
1
2
I
CV
HP_GAIN2
(HP Mono)
2
CV
DD
MG2
MC2
RG2
LG2
B2
DD
Description
Description
voltage does not reset the device.
_SD
B2
0
2
C registers are restored to their
HP_GAIN1
(LS L&R)
Turn_On
_Time
MG1
MC1
RG1
LG1
B1
B1
0
2
CV
DD
HP_GAIN0
300446s2
B0 (R/W)
(LS Mono)
drops below
PWR_On
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MG0
MC0
RG0
LG0
B0
0
DD
.