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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8903CLGEFK/R датащи(PDF) 57 Page - Wolfson Microelectronics plc |
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WM8903CLGEFK/R датащи(HTML) 57 Page - Wolfson Microelectronics plc |
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57 / 178 page  Production Data WM8903 w PD, Rev 4.5, June 2012 57 DAC DIGITAL VOLUME CONTROL The output level of each DAC can be controlled digitally over a range from -71.625dB to 0dB in 0.375dB steps. The level of attenuation for an eight-bit code is detailed in Table 31. The DAC_VU bit controls the loading of digital volume control data. When DAC_VU is set to 0, the DACL_VOL or DACR_VOL control data is loaded into the respective control register, but does not actually change the digital gain setting. Both left and right gain settings are updated when a 1 is written to DAC_VU. This makes it possible to update the gain of both channels simultaneously. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R30 (1Eh) DAC Digital Volume Left 8 DACVU N/A DAC Volume Update Writing a 1 to this bit causes left and right DAC volume to be updated simultaneously (Write-Only Register) 7:0 DACL_VOL [7:0] 1100_0000 (0dB) Left DAC Digital Volume 00h = Mute 01h = -71.625dB 02h = -71.250dB … (0.375dB steps) C0h = 0dB … (0.375dB steps) EFh to FFh = +17.625dB (See Table 31 for volume range) R31 (1Fh) DAC Digital Volume Right 8 DACVU N/A DAC Volume Update Writing a 1 to this bit causes left and right DAC volume to be updated simultaneously (Write-Only Register) 7:0 DACR_VOL [7:0] 1100_0000 (0dB) Right DAC Digital Volume 00h = Mute 01h = -71.625dB 02h = -71.250dB … (0.375dB steps) C0h = 0dB … (0.375dB steps) EFh to FFh = +17.625dB (See Table 31 for volume range) Table 30 DAC Digital Volume Control |
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