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TW2864D Datasheet(PDF) 89 Page - Renesas Technology Corp

Part # TW2864D
Description  4-Channel Video Decoders and Audio Codecs For Security Applications
PDF  110 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

TW2864D Datasheet(HTML) 89 Page - Renesas Technology Corp

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TW2864
FN7745 Rev. 0.00
Page 89 of 110
September 28, 2012
Index
Audio Detection Period
[7]
[6]
[5]
[4]
[3]
[2]
[1]
[0]
0xE1
AAMPMD
ADET_FILT
ADET_
TH4[4]
ADET_
TH3[4]
ADET_
TH2[4]
ADET_
TH1[4]
AAMPMD
Define the audio detection method.
0
Detect audio if absolute amplitude is greater than threshold (default)
1
Detect audio if differential amplitude is greater than threshold
ADET_FILT
Select the filter for audio detection
0
Wide LPF (default)
.
.
.
.
7
Narrow LPF
Index
Audio Detection Threshold
[7]
[6]
[5]
[4]
[3]
[2]
[1]
[0]
0xE1
AAMPMD
ADET_FILT
ADET_
TH4[4]
ADET_
TH3[4]
ADET_
TH2[4]
ADET_
TH1[4]
0xE2
ADET_TH2[3:0]
ADET_TH1[3:0]
0xE3
ADET_TH4[3:0]
ADET_TH3[3:0]
ADET_TH
Define the threshold value for audio detection.
ADET_TH1 : Audio input AIN1.
ADET_TH2 : Audio input AIN2.
ADET_TH3 : Audio input AIN3.
ADET_TH4 : Audio input AIN4.
0
Low value (default)
.
.
.
.
31 High value
If fs=8kHz Audio Clock setting mode,
Reg0xE1=0xC0,Reg0xE2=0xAA,Reg0xE3=0xAA are typical setting value.
If fs=16kHz/32kHz/44.1kHz/48kHz Audio Clock setting mode,
Reg0xE1=0xE0,Reg0xE2=0xBB,Reg0xE3=0xBB are typical setting value.



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