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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8602 датащи(PDF) 29 Page - Wolfson Microelectronics plc |
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WM8602 датащи(HTML) 29 Page - Wolfson Microelectronics plc |
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29 / 46 page  Product Preview WM8602 w PP Rev 1.5 May 2004 29 VOLXX[7:0] VOLUME LEVEL 00(hex) -∞dB (mute) 01(hex) -103dB : : : : CF(hex) 0dB : : : : FE(hex) +23.5dB FF(hex) +24dB Table 32 Volume Control Levels DUAL VOLUME CONTROL Setting the DVC register bit causes the volume settings to be applied in pairs. For example, the DVCF causes the Left channel volume settings to be applied to both the Left and Right channels from the next audio input sample. No update to the VOL registers is required for DVC to take effect. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R11 (0Bh) Dual Volume Control 0 DVCF 0 Dual Volume Control – Left/Right Channels: 0 : Use VOLFR setting for Right channel 1: Apply VOLFL setting to Right channel Table 33 Dual Volume Control SOFT MUTE AND AUTO-MUTE The WM8602 has a Soft Mute function set by the SMUTE control bit. Figure 20 shows the application and release of SMUTE while a full amplitude sinusoid is being played at 48kHz sampling rate. When SMUTE (lower trace) is asserted, the output (upper trace) begins to decay exponentially from the DC level of the last input sample. The output will decay towards zero with a time constant of approximately 64 input samples. When SMUTE is turned off, the output will restart almost immediately from the current input sample, thus possibly causing a pop sound. This function is disabled by default. |
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