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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8595 датащи(PDF) 30 Page - Wolfson Microelectronics plc |
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WM8595 датащи(HTML) 30 Page - Wolfson Microelectronics plc |
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30 / 82 page  WM8595 Production Data w PD, Rev 4.2, January 2011 30 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R2 DAC1_CTRL1 02h 7 DAC1 _ZCEN 1 DAC Digital Volume Control Zero Cross Enable 0 = Do not use zero cross 1 = Use zero cross R7 DAC2_CTRL1 07h 7 DAC2 _ZCEN Table 17 DAC Digital Volume Control SOFTMUTE A soft mute can be applied to DAC1 and DAC2 independently. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R2 DAC1_CTRL1 02h 9 DAC1_ MUTE 0 DAC Softmute 0 = Normal operation 1 = Softmute applied R7 DAC2_CTRL1 07h 9 DAC2_ MUTE 0 Table 18 DAC Softmute Control -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 0 0.001 0.002 0.003 0.004 0.005 0.006 Time(s) Figure 18 Application and Release of DAC Soft Mute Figure 18 shows the applications and release of DAC soft mute whilst a full amplitude sinusoid is being played at 48kHz sampling rate. When DACx_MUTE (lower trace) is asserted, the output (upper trace) of the appropriate DAC will decay exponentially from the DC level of the last input sample towards VMID2C with a time constant of approximately 64 input samples. When DACx_MUTE is de-asserted, the output will restart immediately from the current input sample. |
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