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STA339BWS データシート(PDF) 69 Page - STMicroelectronics

部品番号 STA339BWS
部品情報  FFX with 100-dB SNR and dynamic range
PDF  79 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA339BWS データシート(HTML) 69 Page - STMicroelectronics

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STA339BWS
Register description
79
Figure 21. EQDRC scheme
Extended postscale range
Postscale is an attenuation by default. When PS48DB is set to 1, an offset of 48 dB is
applied to the configured word, so postscale can act as a gain too.
Extended attack rate
The attack rate shown in Table 66 can be extended to provide up to 8 dB/ms attack rate on
both limiters.
Extended biquad selector
De-emphasis filter as well as bass and treble controls can be configured as user defined
filters when equalization coefficients link is activated (BQL = 1) and the corresponding BQx
bit is set to 1.
Table 77. Bit PS48DB description
PS48DB
Mode
0
Postscale value is applied as defined in coefficient RAM
1
Postscale value is applied with offset of +48 dB with respect to the coefficient
RAM value
Table 78. Bit XAR1 description
XAR1
Mode
0
Limiter1 attack rate is configured using Table 66
1
Limiter1 attack rate is 8 dB/ms
Table 79. Bit XAR2 description
XAR2
Mode
0
Limiter2 attack rate is configured using Table 66
1
Limiter2 attack rate is 8 dB/ms



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