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AN3959 датащи(PDF) 43 Page - STMicroelectronics

номер детали AN3959
подробное описание детали  The purpose of this application note is to describe
PDF  65 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3959 датащи(HTML) 43 Page - STMicroelectronics

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AN3959
Software setup to use the STA381BW/STA381BWS devices (ST Map)
Doc ID 022081 Rev 3
43/65
Compression ratio - 1:2 = 4
●
Coefficient value = HEX [(4/26) * 223] = HEX (524288) = 0x080000
●
Write in RAM:
–
0x57
→0x080000
–
0x61
→0x080000
Attack rate: +4 dB/msec
●
Coefficient value = HEX [(4/26) * 223] = HEX (524288) = 0x080000
●
Write in RAM:
0x55
→0x080000
0x5F
→0x080000
Release rate: 0.01953 dB/msec
●
Coefficient value = HEX (Value * 223) = HEX (0.01953*223) = 0x027EF9
●
Write in RAM:
0x54
→0x027EF9
0x5E
→0x027EF9
Dynamic attack rate: 0.039 dB/msec
●
Coefficient value = HEX (Value * 223) = HEX (0.039*223) = 0x04FDF3
●
Write in RAM:
0x71
→0x04FDF3
Offset: 0.5 dB for all DRC
●
Coefficient value = HEX [(0.5/26) * 223] = 0x010000
●
Write in RAM:
0x68
→0x010000
0x69
→0x010000
0x6A
→0x010000
0x6B
→0x010000



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