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WM8991 Datasheet(PDF) 70 Page - Wolfson Microelectronics plc |
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WM8991 Datasheet(HTML) 70 Page - Wolfson Microelectronics plc |
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70 / 174 page  WM8991 Pre-Production w PP, May 2008, Rev 3.1 70 REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION 8 OPVU[2] N/A Output PGA Volume Update Writing a 1 to this bit will update LOPGA, ROPGA, LOUTVOL and ROUTVOL volumes simultaneously. 7 LOPGAZC 0b LOPGA Zero Cross Enable 0 = Zero cross disabled 1 = Zero cross enabled R32 (20h) 6:0 LOPGAVOL [6:0] 79h (0dB) LOPGA Volume (See Table 36 for output PGA volume control range) 8 OPVU[3] N/A Output PGA Volume Update Writing a 1 to this bit will update LOPGA, ROPGA, LOUTVOL and ROUTVOL volumes simultaneously. 7 ROPGAZC 0b ROPGA Zero Cross Enable 0 = Zero cross disabled 1 = Zero cross enabled R33 (21h) 6:0 ROPGAVOL [6:0] 79h (0dB) ROPGA Volume (See Table 36 for output PGA volume control range) 8 OPVU[0] N/A Output PGA Volume Update Writing a 1 to this bit will update LOPGA, ROPGA, LOUTVOL and ROUTVOL volumes simultaneously. 7 LOZC 0b LOUT (Left Headphone Output) Zero Cross Enable 0 = Zero cross disabled 1 = Zero cross enabled R28 (1Ch) 6:0 LOUTVOL [6:0] 00h (mute) LOUT (Left Headphone Output) Volume (See Table 36 for output PGA volume control range) 8 OPVU[1] N/A Output PGA Volume Update Writing a 1 to this bit will update LOPGA, ROPGA, LOUTVOL and ROUTVOL volumes simultaneously. 7 ROZC 0b ROUT (Right Headphone Output) Zero Cross Enable 0 = Zero cross disabled 1 = Zero cross enabled R29 (1Dh) 6:0 ROUTVOL [6:0] 00h (mute) ROUT (Right Headphone Output) Volume (See Table 36 for output PGA volume control range) Table 35 LOPGA, ROPGA, LOUT and ROUT Volume Control |
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