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TDA7417 датащи(PDF) 14 Page - STMicroelectronics |
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TDA7417 датащи(HTML) 14 Page - STMicroelectronics |
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14 / 34 page ![]() Description of the audioprocessor TDA7417 14/34 AutoZero-Remain In some cases, for example if the µP is executing a refresh cycle of the IIC-Bus- programming, it is not useful to start a new AutoZero-action because no new source is selected and an undesired mute would appear at the outputs. For such applications, it can be switched in the AutoZero-Remain-Mode (Bit 6 of the subaddress-byte). If this bit is set to high, the AutoZero will not be invoked and the old adjustment-value remains. 4.3 Loudness There are four parameters programmable in the loudness stage: 4.3.1 Attenuation Figure 4 shows the attenuation as a function of frequency at fP = 400Hz. Figure 4. Loudness Attenuation @ fP = 400Hz 4.3.2 Peak Frequency Figure 5 shows the four possible peak-frequencies at 400, 800 and 2400Hz. Figure 5. Loudness Center frequencies @ Attn. = 15dB |
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