參數(shù)資料
型號: LM4931
廠商: National Semiconductor Corporation
英文描述: Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
中文描述: 與單聲道音頻子系統(tǒng)高效揚(yáng)聲器和立體聲耳機(jī)放大器
文件頁數(shù): 15/47頁
文件大?。?/td> 1640K
代理商: LM4931
Voice Codec Configuration Register
This register configures the voiceband codec, sidetone attenuation, and selected control functions.
DEFAULT CHART FOR VOICE_CONFIG (01h)
DATA BIT
DEFAULT
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
VOICE_CONFIG (01h) (SET = LOGIC 1, CLEAR = LOGIC 0)
Address Register
3:0
Description
Programs the attenuation of the digital sidetone. Attenuation is set as follows:
3:0
Sidetone
Attenuation
0000
Mute
0001
–30dB
0010
–27dB
0011
–24dB
0100
–21dB
0101
–18dB
0110
–15dB
0111
–12dB
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.
RESERVED (Note 14)
Disables the Voice ADC dither.
Disables the Voice DAC dither.
SIDETONE_ATTEN
3:0
Sidetone
Attenuation
–9dB
–6dB
–3dB
0dB
0dB
0dB
0dB
0dB
1000
1001
1010
1011
1100
1101
1110
1111
4
AUTO_SIDE
5
6
7
RSVD
VADC_DITHER_OFF
VDAC_DITHER_OFF
L
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