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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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STA382BW Scheda tecnica(PDF) 147 Page - STMicroelectronics |
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STA382BW Scheda tecnica(HTML) 147 Page - STMicroelectronics |
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147 / 172 page  STA382BW Register description: Sound Terminal compatibility Doc ID 022783 Rev 1 147/172 7.18 Extra volume resolution configuration registers (address 0x3F; 0x40) Extra volume resolution allows fine volume tuning by steps of 0.125 dB. The feature is enabled when VRESEN=1, as depicted in Figure 41. The overall channel volume in this case will be CxVol+CxVR (in dB), while the master volume will be MVOL+MVR (in dB). Figure 41. Extra resolution volume scheme If VRESEN = 0 the channel volume will be defined only by the CxVol registers. Fine tuning steps can be set according to the following table for channels 1, 2,3, and master volume. Table 164. Volume fine-tuning steps D7 D6 D5 D4 D3 D2 D1 D0 VRESEN VRESTG C3VR[1] C3VR[0] C2VR[1] C2VR[0] C1VR[1] C1VR[0] 10 00 00 0 0 D7 D6 D5 D4 D3 D2 D1 D0 reserved reserved reserved reserved reserved reserved MVR[1] MVR[0] 00 00 00 0 0 CxVR/MVR Mode 00 0 dB 01 -0.125 dB 10 -0.25 dB 11 -0.375 dB Audio Data Out CxVOL Soft Volume X X Audio Data In VRESEN VRESTG CxVR MVOL or CxVOL’event 1 0 0 1 Audio Data Out CxVOL Soft Volume X X Audio Data In VRESEN VRESTG CxVR MVOL or CxVOL’event 1 0 0 1 |
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