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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) 32 Page - Wolfson Microelectronics plc |
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WM8595 датащи(HTML) 32 Page - Wolfson Microelectronics plc |
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32 / 82 page  WM8595 Production Data w PD, Rev 4.2, January 2011 32 ANALOGUE OUTPUT VOLUME CONTROL ANALOGUE VOLUME CONTROL Each analogue output includes analogue volume control. Volume changes can be applied to each output immediately as they are written. Alternatively, all volume changes can be written, and then all volume changes can be applied simultaneously using the volume update feature. Volume control includes optional zero cross functionality. When zero cross is enabled, volume changes are not applied until the output level crosses the DC level of the analogue channel (VMID). Zero cross helps to prevent pop and click noise when changing volume settings. The zero cross function includes a timeout which forces volume changes if a zero cross event does not occur. The timeout period is a maximum of 278ms. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R19 PGA1L_VOL 13h 7:0 PGA1L_ VOL[7:0] 00001100 PGA Volume 0000 0000 = +6dB 0000 0001 = +5.5dB …0.5dB steps 00001100 = 0dB … 1001 1110 = -73.5dB 1001 1111 = PGA Mute R20 PGA1R_VOL 14h 7:0 PGA1R_ VOL[7:0] R21 PGA2L_VOL 15h 7:0 PGA2L_ VOL[7:0] R22 PGA2R_VOL 16h 7:0 PGA2R_ VOL[7:0] R19 PGA1L_VOL 13h 8 PGA1L_ VU 0 PGA Volume Update 0 = Latch corresponding volume setting into Register Map but do not update volume 1 = Latch corresponding volume setting into Register Map and update all channels simultaneously R20 PGA1R_VOL 14h 8 PGA1R_ VU R21 PGA2L_VOL 15h 8 PGA2L_ VU R22 PGA2R_VOL 16h 8 PGA2R_ VU R25 PGA_CTRL1 19h 2 PGA1L_ ZC 0 PGA Gain Zero Cross Enable 0 = PGA gain updates occur immediately 1 = PGA gain updates occur on zero cross 3 PGA1R_ ZC 4 PGA2L_ ZC 5 PGA2R_ ZC Table 22 Analogue Volume Control |
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