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LM4931ITL/NOPB 데이터시트(PDF) 13 Page - Texas Instruments

부품명 LM4931ITL/NOPB
상세설명  LM4931 Boomer™ Audio Power Amplifier Series Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
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제조업체  TI2 [Texas Instruments]
홈페이지  https://www.ti.com
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LM4931ITL/NOPB 데이터시트(HTML) 13 Page - Texas Instruments

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LM4931
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SNAS251E – APRIL 2004 – REVISED MAY 2013
Table 3. BASIC_CONFIG (00h) (SET = LOGIC 1, CLEAR = LOGIC 0) (continued)
4
SOFTRESET
If set, resets the LM4931, excluding the I2C/SPI registers and PLL. SOFTRESET should be cleared
to resume normal operation.
5
DAC_
Disables the audio DAC dither.
DITHER_OFF
6
BYPASS_BYPASS
If set the power management and control circuit will assume that bypass is at VDD/2 even when
such condition is false(2).
7
RSVD
RESERVED(3)
(2)
It is recommended to alter this bit only while the part is in Powerdown mode.
(3)
Reserved bits should be set to zero when programming the associated register.
Voice Codec Configuration Register
This register configures the voiceband codec, sidetone attenuation, and selected control functions.
Table 4. DEFAULT CHART FOR VOICE_CONFIG (01h)
DATA BIT
7
6
5
4
3
2
1
0
DEFAULT
0
0
0
0
0
0
0
0
Table 5. VOICE_CONFIG (01h) (SET = LOGIC 1, CLEAR = LOGIC 0)
Address
Register
Description
3:0
SIDETONE_ATTEN
Programs the attenuation of the digital sidetone. Attenuation is set as follows:
3:0
Sidetone
3:0
Sidetone Attenuation
Attenuation
0000
Mute
1000
–9dB
0001
–30dB
1001
–6dB
0010
–27dB
1010
–3dB
0011
–24dB
1011
0dB
0100
–21dB
1100
0dB
0101
–18dB
1101
0dB
0110
–15dB
1110
0dB
0111
–12dB
1111
0dB
4
AUTO_SIDE
This will automatically disable the sidetone when in a VOICE over loudspeaker mode except when
the headphone is connected and the loudspeaker is muted by the HP_SENSE control.
5
RSVD
RESERVED(1)
6
VADC_DITHER_OFF
Disables the Voice ADC dither.
7
VDAC_DITHER_OFF
Disables the Voice DAC dither.
(1)
Reserved bits should be set to zero when programming the associated register.
Microphone Gain Registers
This register is used to control the gain of the microphone preamplifier.
Table 6. DEFAULT CHART FOR MIC_GAIN (02h)
DATA BIT
7
6
5
4
3
2
1
0
DEFAULT
0
0
0
0
0
0
0
0
Copyright © 2004–2013, Texas Instruments Incorporated
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