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WM9713 датащи(PDF) 25 Page - Wolfson Microelectronics plc |
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WM9713 датащи(HTML) 25 Page - Wolfson Microelectronics plc |
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25 / 111 page ![]() Preliminary Technical Data WM9713L 1 PTD, March 2004, Rev 2.2 25 LEFT CHANNEL RIGHT CHANNEL PCMFS PCMCLK PCMADC/ PCMDAC n 3 2 1 n-2 n-1 LSB MSB n 3 2 1 n-2 n-1 1 BCLK / VXCLK Input Word Length (WL) 1/fs Figure 7 DSP Mode Audio Interface (mode A, FSP=0) LEFT CHANNEL RIGHT CHANNEL PCMFS PCMCLK PCMADC/ PCMDAC n 3 2 1 n-2 n-1 LSB MSB n 3 2 1 n-2 n-1 1 BCLK / VXCLK Input Word Length (WL) 1/fs Figure 7 DSP Mode Audio Interface (mode B, FSP=1) In Left Justified mode, the MSB is available on the first rising edge of PCMCLK following a PCMFS transition. The other bits up to the LSB are then transmitted in order. Depending on word length, PCMCLK frequency and sample rate, there may be unused PCMCLK cycles before each PCMFS transition. LEFT CHANNEL RIGHT CHANNEL PCMFS PCMCLK PCMADC/ PCMDAC 1/fs n 3 2 1 n-2 n-1 LSB MSB n 3 2 1 n-2 n-1 LSB MSB Figure 8 Left Justified Audio Interface (assuming n-bit word length) In Right Justified mode, the LSB is available on the last rising edge of PCMCLK before a PCMFS transition. All other bits are transmitted before (MSB first). Depending on word length, PCMCLK frequency and sample rate, there may be unused PCMCLK cycles after each PCMFS transition. |
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