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WM9710 датащи(PDF) 19 Page - Wolfson Microelectronics plc |
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WM9710 датащи(HTML) 19 Page - Wolfson Microelectronics plc |
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19 / 32 page ![]() WM9710 Production Data w PD Rev 4.0 December 2003 19 SLOT NUMBER SYNC SDATAOUT SDATAIN TAG PHASE TAG CMD ADR CMD DATA PCM LEFT PCM RIGHT RSRVD RSRVD RSRVD TAG STATUS ADDR STATUS DATA PCM LEFT PCM RIGHT RSRVD RSRVD RSRVD RSRVD RSRVD RSRVD RSRVD DATA PHASE 01 23 4 5 67 89 10 11 12 PCM C (n+1) PCM R (n+1) PCM L (n+1) CODEC ID SLOTREQ 3-12 RSRVD RSRVD RSRVD RSRVD RSRVD RSRVD Figure 9 AC’97 Standard Bi-Directional Audio Frame SYNC BITCLK SDATAOUT VALID FRAME SLOT(1) SLOT(2) SLOT(12) '0' '0' '0' 19 0 19 0 19 0 19 0 TAG PHASE DATA PHASE 20.8 µS (48kHz) 12.288MHz 81.4nS END OF PREVIOUS AUDIO FRAME TIME SLOT 'VALID' BITS ('1' = TIME SLOT CONTAINS VALID PCM DATA) SLOT (1) SLOT (2) SLOT (3) SLOT (12) Figure 10 AC-link Audio Output Frame The datastreams currently defined by the AC’97 specification include: PCM playback - 2 output slots 2-channel composite PCM output stream PCM record data - 2 input slots 2-channel composite PCM input stream Control - 2 output slots Control Register write port Status - 2 input slots Control Register read port Optional modem line codec output - 1 output slot Modem line codec DAC input stream Optional modem line codec input – 1 input slot Modem line codec ADC output stream Optional dedicated microphone input - 1 input slot Dedicated microphone input stream in support of stereo AEC and/or other voice applications. |
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