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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STA381BWS датащи(PDF) 117 Page - STMicroelectronics |
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STA381BWS датащи(HTML) 117 Page - STMicroelectronics |
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117 / 174 page  DocID018937 Rev 7 117/174 STA381BWS Register description: Sound Terminal compatibility 7.5.1 Noise-shaper bandwidth selection 7.5.2 AM mode enable The STA381BWS features an FFX processing mode that minimizes the amount of noise generated in the frequency range of AM radio. This mode is intended for use when FFX is operating in a device with an active AM tuner. The SNR of the FFX processing is reduced to approximately 83 dB in this mode, which is still greater than the SNR of AM radio. 7.5.3 PWM speed mode 7.5.4 Zero-crossing enable The ZCE bit enables zero-crossing adjustment. When volume is adjusted on digital zero- crossing, no clicks are audible. 7.5.5 Soft volume update enable Table 119. Noise-shaper bandwidth selection Bit R/W RST Name Description 2 R/W 0 NSBW 1: Third order NS 0: Fourth order NS Table 120. AM mode enable Bit R/W RST Name Description 3 R/W 0 AME 0: Normal FFX operation 1: AM reduction mode FFX operation Table 121. PWM speed mode Bit R/W RST Name Description 4 R/W 0 PWMS 0: Normal speed (384 kHz) all channels 1: Odd speed (341.3 kHz) all channels. Not suitable for binary BTL mode. Table 122. Zero-crossing enable Bit R/W RST Name Description 6 R/W 0 ZCE 1: Volume adjustments only occur at digital zero-crossing 0: Volume adjustments occur immediately Table 123. Soft volume update enable Bit R/W RST Name Description 7 R/W 1 SVE 1: Volume adjustments ramp according to SVR settings 0: Volume adjustments occur immediately Obsolete Product(s) - Obsolete Product(s) |
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